fitMeanMSD has NaN values?

[mr-september]

Hi, I have been trying to do MSD analysis, following parts of this manual and this tutorial. However, I am hitting a wall with NaN values:

Error using fit>iFit (line 232)
X, Y and WEIGHTS cannot have NaN values.

Error in fit (line 116)
[fitobj, goodness, output, convmsg] = iFit( xdatain, ydatain, fittypeobj, ...

Error in msdanalyzer/fitMeanMSD (line 44)
[fo, gof] = fit(t, y, ft, 'Weights', w);

Error in MSD_a (line 63)
[fo, gof] = ma.fitMeanMSD;

My whole Matlab script (the error comes from the very last section % calculate diffusion coefficiency):

% housekeeping
addpath('C:\Users\...\MSD-a\Fiji.app\scripts' )

% import track

file_path_tracks = 'PEI_chan00_Tracks.xml';
tracks = importTrackMateTracks(file_path_tracks);
n_tracks = numel( tracks );
fprintf('Found %d tracks in the file.\n', n_tracks)

% remove Z set time scale

clipZ = true; % Remove Z coordinates, if you know you can.
scaleT = true; % Use physical time for T.
tracks = importTrackMateTracks(file_path_tracks, clipZ, scaleT);
tracks{1}(5, :)

[ tracks, md ] = importTrackMateTracks(file_path_tracks, ...
clipZ, scaleT);
md

% plot figure

figure
hold on
c = jet(n_tracks);
for s = 1 : n_tracks
x = tracks{s}(:, 2);
y = tracks{s}(:, 3);
plot(x, y, '.-', 'Color', c(s, :))
end
axis equal
xlabel( [ 'X (' md.spaceUnits ')' ] )
ylabel( [ 'Y (' md.spaceUnits ')' ] )

% MSD calculation
SPACE_UNITS = 'µm';
TIME_UNITS = 's';
ma = msdanalyzer(2, SPACE_UNITS, TIME_UNITS);
ma = ma.addAll(tracks);

disp(ma)
ma = ma.computeMSD;
ma.msd

% Plot MSD
figure
ma.plotMSD;

% weighted average

cla
ma.plotMeanMSD(gca, true)
mmsd = ma.getMeanMSD;
t = mmsd(:,1);
x = mmsd(:,2);
dx = mmsd(:,3) ./ sqrt(mmsd(:,4));
errorbar(t, x, dx, 'k')

% calculate diffusion coefficiency
[fo, gof] = ma.fitMeanMSD;
plot(fo)
ma.labelPlotMSD;
legend off

And my PEI_chan00_Tracks.xml as outputted from TrackMate on FIJI (sorry about the mess, GitHub doesn't allow attaching this format):

<?xml version="1.0" encoding="UTF-8"?>
<Tracks nTracks="1" spaceUnits="pixel" frameInterval="1.0" timeUnits="frame" generationDateTime="Fri, 31 Dec 2021 00:44:16" from="TrackMate v7.4.0">
  <particle nSpots="423">
    <detection t="0" x="243.91340860624987" y="342.884031899681" z="0.0" />
    <detection t="1" x="243.37191200945378" y="343.84266326207654" z="0.0" />
    <detection t="2" x="243.48862247307162" y="343.218811985051" z="0.0" />
    <detection t="3" x="243.80818393062617" y="342.71267505358526" z="0.0" />
    <detection t="4" x="244.6699589289865" y="341.1865422465219" z="0.0" />
    <detection t="5" x="243.99688189694" y="342.84752211349456" z="0.0" />
    <detection t="6" x="244.43138665612986" y="341.2458458716915" z="0.0" />
    <detection t="7" x="243.7580033763809" y="342.703188463087" z="0.0" />
    <detection t="8" x="244.00771996971704" y="342.4693247748605" z="0.0" />
    <detection t="9" x="244.06595144508702" y="342.82585001801306" z="0.0" />
    <detection t="10" x="243.55139707604897" y="343.38607994076096" z="0.0" />
    <detection t="11" x="244.11812957910607" y="342.3975326136204" z="0.0" />
    <detection t="12" x="243.7032778050904" y="343.69995490156924" z="0.0" />
    <detection t="13" x="244.16351365918496" y="342.54552482997155" z="0.0" />
    <detection t="14" x="244.22296231027093" y="343.35102540893917" z="0.0" />
    <detection t="15" x="243.56937742908158" y="342.7292821795872" z="0.0" />
    <detection t="16" x="244.00725527325406" y="343.22039752649897" z="0.0" />
    <detection t="17" x="243.7257164924326" y="342.6726444680566" z="0.0" />
    <detection t="18" x="244.36271031200394" y="341.55902913192915" z="0.0" />
    <detection t="19" x="244.0070180504403" y="342.7024811909327" z="0.0" />
    <detection t="20" x="243.99443275048745" y="342.889222949332" z="0.0" />
    <detection t="21" x="244.32595064823605" y="342.26326222073084" z="0.0" />
    <detection t="22" x="243.44424186204208" y="343.5480510031946" z="0.0" />
    <detection t="23" x="243.62705348186304" y="343.5302002076695" z="0.0" />
    <detection t="24" x="243.0827673351158" y="344.4293294897878" z="0.0" />
    <detection t="25" x="244.54959582859496" y="343.5271224995209" z="0.0" />
    <detection t="26" x="244.62408731620184" y="342.24025470757766" z="0.0" />
    <detection t="27" x="244.09759839536667" y="341.33440261887415" z="0.0" />
    <detection t="28" x="244.13272086462143" y="341.640870597733" z="0.0" />
    <detection t="29" x="244.11298201756682" y="342.2039462260154" z="0.0" />
    <detection t="30" x="243.83895207803724" y="342.47518785145866" z="0.0" />
    <detection t="31" x="243.86338880659605" y="343.1416087910114" z="0.0" />
    <detection t="32" x="244.9599622443296" y="340.28742770646824" z="0.0" />
    <detection t="33" x="243.68650961482882" y="341.9145482846327" z="0.0" />
    <detection t="34" x="243.71983035668694" y="343.32090240539" z="0.0" />
    <detection t="35" x="243.89153299978483" y="344.28990442720453" z="0.0" />
    <detection t="36" x="243.24093289957074" y="344.2709193016204" z="0.0" />
    <detection t="37" x="243.64701918583182" y="341.30948539943284" z="0.0" />
    <detection t="38" x="244.51406358447684" y="342.1814466747606" z="0.0" />
    <detection t="39" x="244.83535200947853" y="341.981446879541" z="0.0" />
    <detection t="40" x="244.22074709220644" y="342.6533580101045" z="0.0" />
    <detection t="41" x="243.50262269398482" y="343.58804916605345" z="0.0" />
    <detection t="42" x="244.20315448630978" y="342.12156298310606" z="0.0" />
    <detection t="43" x="243.31249731034987" y="343.01525511410995" z="0.0" />
    <detection t="44" x="243.64048051250032" y="343.3213979630938" z="0.0" />
    <detection t="45" x="244.5433492876832" y="341.3119268815028" z="0.0" />
    <detection t="46" x="244.37180790350288" y="342.24346868147586" z="0.0" />
    <detection t="47" x="244.0410472363703" y="342.0807734829141" z="0.0" />
    <detection t="48" x="245.26435436532822" y="341.16419790663167" z="0.0" />
    <detection t="49" x="244.90434680894606" y="342.234438690088" z="0.0" />
    <detection t="50" x="244.17662754575892" y="342.30503838348596" z="0.0" />
    <detection t="51" x="244.14915332202622" y="342.1311456096883" z="0.0" />
    <detection t="52" x="244.21695010871542" y="341.743029702457" z="0.0" />
    <detection t="53" x="243.6689339399493" y="343.24544903408713" z="0.0" />
    <detection t="54" x="243.48164973157463" y="343.810607707057" z="0.0" />
    <detection t="55" x="244.6520331999213" y="340.84934651624474" z="0.0" />
    <detection t="56" x="244.76133528173045" y="340.9056626323231" z="0.0" />
    <detection t="57" x="244.529132869555" y="342.60600650064447" z="0.0" />
    <detection t="58" x="244.4031216414121" y="341.51602427293346" z="0.0" />
    <detection t="59" x="243.97934449190836" y="341.9516265374781" z="0.0" />
    <detection t="60" x="244.1974885748928" y="342.36624323964094" z="0.0" />
    <detection t="61" x="244.54365377002205" y="341.57703017904083" z="0.0" />
    <detection t="62" x="243.1959057081634" y="343.04636901180476" z="0.0" />
    <detection t="63" x="243.0842330131855" y="342.15245958160597" z="0.0" />
    <detection t="64" x="243.83377561688" y="342.58059298210804" z="0.0" />
    <detection t="65" x="244.21449600473989" y="342.2684754965984" z="0.0" />
    <detection t="66" x="244.32856982758508" y="341.6833165992277" z="0.0" />
    <detection t="67" x="243.09036640915792" y="344.269179878661" z="0.0" />
    <detection t="68" x="244.51735435055917" y="341.78803984394983" z="0.0" />
    <detection t="69" x="242.7334103407636" y="343.5298890299723" z="0.0" />
    <detection t="70" x="245.20958619299356" y="341.5377079436816" z="0.0" />
    <detection t="71" x="244.25033690718467" y="343.4754524545308" z="0.0" />
    <detection t="72" x="243.988036766094" y="342.79558528580606" z="0.0" />
    <detection t="73" x="244.09902513587528" y="343.1952247218019" z="0.0" />
    <detection t="74" x="245.03380372112719" y="341.9053055825794" z="0.0" />
    <detection t="75" x="243.94692399028904" y="342.9198037000831" z="0.0" />
    <detection t="76" x="244.96976711539253" y="341.66184562242364" z="0.0" />
    <detection t="77" x="244.87968330053044" y="342.184166560177" z="0.0" />
    <detection t="78" x="243.66178856486667" y="342.40058136245574" z="0.0" />
    <detection t="79" x="244.73549350331075" y="342.7775619176628" z="0.0" />
    <detection t="80" x="245.10384645644984" y="341.5552664972483" z="0.0" />
    <detection t="81" x="243.98799741658425" y="343.9387784640773" z="0.0" />
    <detection t="82" x="243.8532641352346" y="342.9913580307215" z="0.0" />
    <detection t="83" x="244.5388677482134" y="341.7338595715441" z="0.0" />
    <detection t="84" x="244.27205555957516" y="342.7218200930488" z="0.0" />
    <detection t="85" x="243.81355445839603" y="343.0928886774595" z="0.0" />
    <detection t="86" x="243.49917200724155" y="341.4052904073161" z="0.0" />
    <detection t="87" x="244.70504013147814" y="341.34788132965275" z="0.0" />
    <detection t="88" x="243.78182408522167" y="343.347807515264" z="0.0" />
    <detection t="89" x="243.69856745189372" y="342.8115798972077" z="0.0" />
    <detection t="90" x="243.99061084014028" y="340.41826956882494" z="0.0" />
    <detection t="91" x="244.3524409610545" y="342.27472702129046" z="0.0" />
    <detection t="92" x="243.8184862514945" y="343.52285399769994" z="0.0" />
    <detection t="93" x="244.19580728765902" y="342.62521139475103" z="0.0" />
    <detection t="94" x="243.77064339999075" y="342.27298212444066" z="0.0" />
    <detection t="95" x="244.37434126346463" y="342.342245021982" z="0.0" />
    <detection t="96" x="243.78502906135307" y="343.2110770867522" z="0.0" />
    <detection t="97" x="243.5922284262749" y="342.7702658067456" z="0.0" />
    <detection t="98" x="244.03114582910317" y="341.90524721216104" z="0.0" />
    <detection t="99" x="243.58504072285814" y="342.31048667785655" z="0.0" />
    <detection t="100" x="243.65669945328887" y="342.48756961098394" z="0.0" />
    <detection t="101" x="243.7124667365678" y="342.87432481878676" z="0.0" />
    <detection t="102" x="243.9331004565169" y="342.4867682651395" z="0.0" />
    <detection t="103" x="243.8862205814322" y="343.1931085333094" z="0.0" />
    <detection t="104" x="243.53970323260276" y="342.79361388159504" z="0.0" />
    <detection t="105" x="242.87401303345064" y="342.79329667143895" z="0.0" />
    <detection t="106" x="244.00335067647285" y="342.6324893771325" z="0.0" />
    <detection t="107" x="244.18555279227343" y="343.20417942261" z="0.0" />
    <detection t="108" x="244.75173502648218" y="342.65650931635054" z="0.0" />
    <detection t="109" x="243.83231691640356" y="343.19682348428927" z="0.0" />
    <detection t="110" x="244.79475871185764" y="341.504197210704" z="0.0" />
    <detection t="111" x="243.69157551238675" y="342.7109216318799" z="0.0" />
    <detection t="112" x="243.88116408133" y="341.49668453028386" z="0.0" />
    <detection t="113" x="243.18031069817965" y="343.0738870849031" z="0.0" />
    <detection t="114" x="243.93273019621145" y="342.37021922341984" z="0.0" />
    <detection t="115" x="244.41690158044608" y="343.15277893923707" z="0.0" />
    <detection t="116" x="243.31966586100762" y="343.5883955360841" z="0.0" />
    <detection t="117" x="243.92944667900957" y="342.96857307295255" z="0.0" />
    <detection t="118" x="243.61110871712992" y="343.18327046202324" z="0.0" />
    <detection t="119" x="243.7607476525357" y="342.06016719156815" z="0.0" />
    <detection t="120" x="244.39138214501165" y="342.3707241411568" z="0.0" />
    <detection t="121" x="243.6123368214537" y="343.18949327817506" z="0.0" />
    <detection t="122" x="244.48105585733893" y="342.6377821441258" z="0.0" />
    <detection t="123" x="244.0891670416133" y="342.4788747396938" z="0.0" />
    <detection t="124" x="243.7893198799499" y="341.2012813571606" z="0.0" />
    <detection t="125" x="243.13651493051972" y="342.59266569193653" z="0.0" />
    <detection t="126" x="244.00754284961965" y="342.1371790996892" z="0.0" />
    <detection t="127" x="243.7461115888613" y="343.34466069831154" z="0.0" />
    <detection t="128" x="243.97207871724495" y="342.923882443868" z="0.0" />
    <detection t="129" x="243.4800760705681" y="343.7862769636631" z="0.0" />
    <detection t="130" x="243.67886875246623" y="343.23894919473963" z="0.0" />
    <detection t="131" x="244.2659793350271" y="340.446509655625" z="0.0" />
    <detection t="132" x="242.75136084996146" y="343.6603593040879" z="0.0" />
    <detection t="133" x="243.40519776935645" y="343.18745621596315" z="0.0" />
    <detection t="134" x="243.8602092563097" y="341.2546376875875" z="0.0" />
    <detection t="135" x="244.45286502286743" y="342.30852161554816" z="0.0" />
    <detection t="136" x="244.06004070121108" y="342.83072759002494" z="0.0" />
    <detection t="137" x="243.48674448714237" y="341.6207053342686" z="0.0" />
    <detection t="138" x="243.8754329060689" y="341.7038490128814" z="0.0" />
    <detection t="139" x="244.29726518275066" y="342.71993617386727" z="0.0" />
    <detection t="140" x="243.45475969984736" y="342.3839962548006" z="0.0" />
    <detection t="141" x="245.25269584286187" y="342.41287602597424" z="0.0" />
    <detection t="142" x="243.96256880304088" y="343.26921552396703" z="0.0" />
    <detection t="143" x="243.54634935949372" y="343.30089929092765" z="0.0" />
    <detection t="144" x="244.03428477003158" y="342.59485345699994" z="0.0" />
    <detection t="145" x="244.39094869100992" y="341.7834697153699" z="0.0" />
    <detection t="146" x="244.49163744890748" y="341.8614351471927" z="0.0" />
    <detection t="147" x="244.7791015895681" y="341.17336202658083" z="0.0" />
    <detection t="148" x="243.28990399160597" y="342.081770053412" z="0.0" />
    <detection t="149" x="243.31774848151179" y="342.47179068230844" z="0.0" />
    <detection t="150" x="244.11591700404819" y="343.75215117681876" z="0.0" />
    <detection t="151" x="243.83287390583914" y="342.605222839501" z="0.0" />
    <detection t="152" x="244.07630781801222" y="342.8017645815374" z="0.0" />
    <detection t="153" x="244.21228441923628" y="342.1219915392759" z="0.0" />
    <detection t="154" x="243.5339974892303" y="342.67925699189993" z="0.0" />
    <detection t="155" x="243.97445264025188" y="342.35323099393315" z="0.0" />
    <detection t="156" x="244.25532983133184" y="342.75508991911977" z="0.0" />
    <detection t="157" x="243.85972783129097" y="341.67667062050555" z="0.0" />
    <detection t="158" x="244.1766631791401" y="342.38569856063776" z="0.0" />
    <detection t="159" x="242.65056235341547" y="344.09530990020886" z="0.0" />
    <detection t="160" x="243.93262349391026" y="341.9632019184528" z="0.0" />
    <detection t="161" x="244.26085747436636" y="342.07088112353676" z="0.0" />
    <detection t="162" x="244.576436396957" y="341.8875205663469" z="0.0" />
    <detection t="163" x="244.61588049529126" y="341.30594552034734" z="0.0" />
    <detection t="164" x="244.01356835528577" y="343.598374630768" z="0.0" />
    <detection t="165" x="244.00277772433392" y="341.95460077708105" z="0.0" />
    <detection t="166" x="244.44000006855993" y="342.4274075685272" z="0.0" />
    <detection t="167" x="244.52871964529186" y="342.431158875548" z="0.0" />
    <detection t="168" x="243.95272498357" y="340.80499123218743" z="0.0" />
    <detection t="169" x="244.49099042197906" y="342.37444199355514" z="0.0" />
    <detection t="170" x="244.8503079782891" y="341.0733563987545" z="0.0" />
    <detection t="171" x="244.4026006024286" y="341.36301332739464" z="0.0" />
    <detection t="172" x="244.1083208071712" y="341.8880067459057" z="0.0" />
    <detection t="173" x="244.40014175133138" y="341.4918946714053" z="0.0" />
    <detection t="174" x="244.4074249665167" y="341.39849002222303" z="0.0" />
    <detection t="175" x="243.65095121023802" y="343.23689202982115" z="0.0" />
    <detection t="176" x="244.19726952188486" y="342.3260638626879" z="0.0" />
    <detection t="177" x="244.99386837651164" y="341.8355982098644" z="0.0" />
    <detection t="178" x="244.87602057159853" y="342.83737258285555" z="0.0" />
    <detection t="179" x="244.25900080515703" y="342.72662853582716" z="0.0" />
    <detection t="180" x="243.8660456635342" y="342.48579503840875" z="0.0" />
    <detection t="181" x="244.33546915277793" y="342.5783639878837" z="0.0" />
    <detection t="182" x="244.09291507349826" y="341.2951466394404" z="0.0" />
    <detection t="183" x="243.79763565724778" y="342.7040901319229" z="0.0" />
    <detection t="184" x="243.9126410736268" y="343.22190705837255" z="0.0" />
    <detection t="185" x="243.9240718521019" y="341.50243536720086" z="0.0" />
    <detection t="186" x="244.1525407547283" y="343.15724802411626" z="0.0" />
    <detection t="187" x="245.35127284628993" y="341.5403896042332" z="0.0" />
    <detection t="188" x="243.82718927103178" y="343.1384498073379" z="0.0" />
    <detection t="189" x="243.57173597559637" y="343.7921845215232" z="0.0" />
    <detection t="190" x="243.7695920903639" y="343.11634244037396" z="0.0" />
    <detection t="191" x="245.22088202194604" y="341.33990721080073" z="0.0" />
    <detection t="192" x="244.9583883521766" y="341.43004406365833" z="0.0" />
    <detection t="193" x="244.03527278990742" y="342.4335072828263" z="0.0" />
    <detection t="194" x="244.01329866768197" y="342.8244171967862" z="0.0" />
    <detection t="195" x="243.5911217258679" y="343.7401346082835" z="0.0" />
    <detection t="196" x="243.4595889268096" y="341.8547172703083" z="0.0" />
    <detection t="197" x="244.16681902567944" y="342.2086080720939" z="0.0" />
    <detection t="198" x="243.79189517403677" y="341.80900267963364" z="0.0" />
    <detection t="199" x="243.97640753018788" y="342.75443297734506" z="0.0" />
    <detection t="200" x="243.22982351500707" y="342.2038807431261" z="0.0" />
    <detection t="201" x="243.60912762058683" y="341.85223533400045" z="0.0" />
    <detection t="202" x="243.68550036915295" y="342.7325857062062" z="0.0" />
    <detection t="203" x="244.30532404811035" y="341.6684353949809" z="0.0" />
    <detection t="204" x="243.5879485216657" y="343.13551870640623" z="0.0" />
    <detection t="205" x="243.14125554199813" y="342.1832975717731" z="0.0" />
    <detection t="206" x="243.72041678086154" y="341.7904919201363" z="0.0" />
    <detection t="207" x="243.65356573018786" y="343.34751555868445" z="0.0" />
    <detection t="208" x="243.8476804543635" y="341.95712290289987" z="0.0" />
    <detection t="209" x="244.11941014248453" y="342.0053434828735" z="0.0" />
    <detection t="210" x="243.4069636667843" y="341.08293440957004" z="0.0" />
    <detection t="211" x="243.80739757032785" y="340.85374007917636" z="0.0" />
    <detection t="212" x="244.03773907504578" y="340.90964026561574" z="0.0" />
    <detection t="213" x="244.17068177681242" y="340.8293883689112" z="0.0" />
    <detection t="214" x="243.73244614991523" y="343.34119468790925" z="0.0" />
    <detection t="215" x="244.45597198634206" y="341.2729775309307" z="0.0" />
    <detection t="216" x="243.8665017422282" y="343.4499521579972" z="0.0" />
    <detection t="217" x="243.5227628085193" y="342.5193217554694" z="0.0" />
    <detection t="218" x="244.26401647740423" y="343.3924268998538" z="0.0" />
    <detection t="219" x="243.77317015824045" y="342.47109908376" z="0.0" />
    <detection t="220" x="243.4408770504021" y="343.93580440810507" z="0.0" />
    <detection t="221" x="243.61882402562395" y="342.6602556017235" z="0.0" />
    <detection t="222" x="244.78346607920133" y="342.3017227508746" z="0.0" />
    <detection t="223" x="244.21387852089347" y="342.20512125718545" z="0.0" />
    <detection t="224" x="244.67838410813164" y="341.6777085121233" z="0.0" />
    <detection t="225" x="243.40279420948082" y="342.5609287585216" z="0.0" />
    <detection t="226" x="244.20561341179703" y="342.84862516409083" z="0.0" />
    <detection t="227" x="243.85040289109085" y="342.814936047266" z="0.0" />
    <detection t="228" x="243.8428051095688" y="342.5131790184941" z="0.0" />
    <detection t="229" x="244.2867267953085" y="340.1474317136585" z="0.0" />
    <detection t="230" x="243.83194849103828" y="343.2685025655878" z="0.0" />
    <detection t="231" x="243.82715462000613" y="342.831404723339" z="0.0" />
    <detection t="232" x="244.17899096601803" y="342.41372008892307" z="0.0" />
    <detection t="233" x="244.5790571959925" y="342.4467808684368" z="0.0" />
    <detection t="234" x="243.90771504049073" y="341.0052375661655" z="0.0" />
    <detection t="235" x="243.54090177243114" y="342.5451204291999" z="0.0" />
    <detection t="236" x="243.84608166460544" y="342.59376378464816" z="0.0" />
    <detection t="238" x="242.68801332274677" y="345.28795039741556" z="0.0" />
    <detection t="239" x="243.48881996602827" y="342.48802536970777" z="0.0" />
    <detection t="240" x="242.75742411131577" y="343.26360248142214" z="0.0" />
    <detection t="241" x="243.99565060395867" y="342.6932831227367" z="0.0" />
    <detection t="242" x="242.90257156670273" y="342.96371336698957" z="0.0" />
    <detection t="243" x="244.38372811494085" y="343.48112204257217" z="0.0" />
    <detection t="244" x="244.36106177611376" y="342.022314341895" z="0.0" />
    <detection t="245" x="244.52213397437612" y="342.72009151877586" z="0.0" />
    <detection t="246" x="243.352288681213" y="342.4474636317599" z="0.0" />
    <detection t="247" x="243.6831971485601" y="343.20608672887016" z="0.0" />
    <detection t="248" x="243.79614078936544" y="342.9989505121543" z="0.0" />
    <detection t="249" x="244.0568634862462" y="342.0828985939355" z="0.0" />
    <detection t="250" x="244.7337222406053" y="341.1645159962176" z="0.0" />
    <detection t="251" x="243.19233367326694" y="344.07677837599937" z="0.0" />
    <detection t="252" x="243.69626312723486" y="342.328994685248" z="0.0" />
    <detection t="253" x="245.11932918083812" y="340.50168459363107" z="0.0" />
    <detection t="254" x="244.23197762228557" y="342.214942316703" z="0.0" />
    <detection t="255" x="244.4690157058266" y="342.0887961873523" z="0.0" />
    <detection t="256" x="243.36615678738528" y="344.06059715186507" z="0.0" />
    <detection t="257" x="244.69371643883377" y="340.74053150847556" z="0.0" />
    <detection t="258" x="244.13067650489128" y="341.20609016291695" z="0.0" />
    <detection t="259" x="243.890906325819" y="342.60494585560804" z="0.0" />
    <detection t="260" x="243.5823708879247" y="343.7718082120638" z="0.0" />
    <detection t="261" x="243.49680083760356" y="342.46848552278226" z="0.0" />
    <detection t="262" x="244.00577237447757" y="342.9760062843658" z="0.0" />
    <detection t="263" x="244.96399302781535" y="340.82624014147774" z="0.0" />
    <detection t="264" x="244.26281907506274" y="342.82460518080353" z="0.0" />
    <detection t="265" x="244.47344538785273" y="341.3426104868375" z="0.0" />
    <detection t="266" x="245.16989029346266" y="341.4553042949032" z="0.0" />
    <detection t="267" x="243.75951089959312" y="341.6804924096941" z="0.0" />
    <detection t="268" x="244.33468404950494" y="342.6873921031434" z="0.0" />
    <detection t="269" x="244.21095059282817" y="341.88216044863736" z="0.0" />
    <detection t="270" x="244.14266184012953" y="342.50762488492563" z="0.0" />
    <detection t="271" x="244.4157339997343" y="341.922098083413" z="0.0" />
    <detection t="272" x="243.6837672591101" y="343.10189618885397" z="0.0" />
    <detection t="273" x="244.92538928478723" y="341.41304321232536" z="0.0" />
    <detection t="274" x="243.24593172929625" y="342.3565755275834" z="0.0" />
    <detection t="275" x="243.56519979128788" y="342.3168785381863" z="0.0" />
    <detection t="276" x="244.0500752144194" y="342.2668979949546" z="0.0" />
    <detection t="277" x="243.42349713329082" y="341.7562643134804" z="0.0" />
    <detection t="278" x="243.42019274837335" y="342.88991875603045" z="0.0" />
    <detection t="279" x="244.1200477375553" y="342.43694152061687" z="0.0" />
    <detection t="280" x="244.4141508017694" y="342.8833658240946" z="0.0" />
    <detection t="281" x="242.86873943881128" y="343.46215863074485" z="0.0" />
    <detection t="282" x="244.06571963606862" y="341.7981258670276" z="0.0" />
    <detection t="283" x="244.381835423386" y="342.746542620995" z="0.0" />
    <detection t="284" x="242.979299671856" y="343.5400589874954" z="0.0" />
    <detection t="285" x="243.5118105409633" y="343.9239963843594" z="0.0" />
    <detection t="286" x="244.5645026710385" y="341.7998791450622" z="0.0" />
    <detection t="287" x="243.61098600509473" y="341.9079082981496" z="0.0" />
    <detection t="288" x="244.14964271302838" y="340.7094566340824" z="0.0" />
    <detection t="289" x="244.42593621902446" y="341.76228180560497" z="0.0" />
    <detection t="290" x="244.72350891924347" y="342.38293464515704" z="0.0" />
    <detection t="291" x="243.77205366207878" y="342.871719115871" z="0.0" />
    <detection t="292" x="243.95913530313845" y="342.1677323101139" z="0.0" />
    <detection t="293" x="244.51403541891892" y="341.3305491245965" z="0.0" />
    <detection t="294" x="243.851429661963" y="341.8492468773561" z="0.0" />
    <detection t="295" x="244.249787663575" y="342.2407445592217" z="0.0" />
    <detection t="296" x="243.5621852276741" y="343.57848008016083" z="0.0" />
    <detection t="297" x="243.61378589455055" y="343.172657610172" z="0.0" />
    <detection t="298" x="244.79103662831713" y="342.20069873924797" z="0.0" />
    <detection t="299" x="243.7095527905251" y="342.7009352465478" z="0.0" />
    <detection t="300" x="243.57480839489463" y="340.6610613391488" z="0.0" />
    <detection t="301" x="244.434603971032" y="342.30566764911913" z="0.0" />
    <detection t="302" x="244.00314376945968" y="341.9112819969903" z="0.0" />
    <detection t="303" x="244.2711798370843" y="343.6715252118184" z="0.0" />
    <detection t="304" x="244.8314179495765" y="340.20583609859585" z="0.0" />
    <detection t="305" x="243.98104799222625" y="343.3838970844967" z="0.0" />
    <detection t="306" x="244.50903372598205" y="342.96516804558905" z="0.0" />
    <detection t="307" x="245.1723734022332" y="341.78925629018664" z="0.0" />
    <detection t="308" x="243.60454599136074" y="343.63860564903626" z="0.0" />
    <detection t="309" x="242.86658566353762" y="343.9410954809222" z="0.0" />
    <detection t="310" x="244.13016882743167" y="341.83593767563036" z="0.0" />
    <detection t="311" x="243.60964668620872" y="342.8389347944353" z="0.0" />
    <detection t="312" x="243.7163483612423" y="342.4714599931169" z="0.0" />
    <detection t="313" x="244.04218527408997" y="342.65094610179625" z="0.0" />
    <detection t="314" x="243.97395211723293" y="343.86950673571704" z="0.0" />
    <detection t="315" x="243.66684078005636" y="343.7349205080597" z="0.0" />
    <detection t="316" x="243.07318472064136" y="342.0669440670113" z="0.0" />
    <detection t="317" x="243.77281754106542" y="341.59322752286334" z="0.0" />
    <detection t="318" x="243.74705688230202" y="342.19226840485436" z="0.0" />
    <detection t="319" x="244.04277368884183" y="341.947749152301" z="0.0" />
    <detection t="320" x="243.83506935276398" y="341.6363015897159" z="0.0" />
    <detection t="321" x="244.06394607310756" y="342.3073704900957" z="0.0" />
    <detection t="322" x="244.28415209240677" y="342.8730645035705" z="0.0" />
    <detection t="323" x="244.0016936369698" y="342.85280900350426" z="0.0" />
    <detection t="324" x="243.64628225340354" y="343.2943622445597" z="0.0" />
    <detection t="325" x="243.64491101752506" y="340.382078543182" z="0.0" />
    <detection t="326" x="243.47503053204295" y="343.574031971357" z="0.0" />
    <detection t="327" x="243.41105320954202" y="344.1447359143825" z="0.0" />
    <detection t="328" x="243.62830869070663" y="342.42240382145974" z="0.0" />
    <detection t="329" x="244.22303192624494" y="341.6475834004336" z="0.0" />
    <detection t="330" x="244.12782080297512" y="341.4541472679037" z="0.0" />
    <detection t="331" x="243.89727453417674" y="343.38366693672043" z="0.0" />
    <detection t="332" x="244.69512382775224" y="340.4589968788083" z="0.0" />
    <detection t="333" x="244.61322830119062" y="339.6776379855296" z="0.0" />
    <detection t="334" x="243.7304380319593" y="342.22664373203514" z="0.0" />
    <detection t="335" x="243.60568450724836" y="341.6751723853535" z="0.0" />
    <detection t="336" x="243.81934437914498" y="343.64083645898563" z="0.0" />
    <detection t="337" x="243.8412499775233" y="343.155605737758" z="0.0" />
    <detection t="338" x="244.52070955540196" y="342.94816251727195" z="0.0" />
    <detection t="339" x="244.72274367579988" y="341.760260684095" z="0.0" />
    <detection t="340" x="244.2109664232425" y="341.227454281009" z="0.0" />
    <detection t="341" x="244.50424702161627" y="341.64670863138286" z="0.0" />
    <detection t="342" x="243.98696681637708" y="342.80043527355696" z="0.0" />
    <detection t="343" x="243.6169290020807" y="342.987189552959" z="0.0" />
    <detection t="344" x="244.31168299101742" y="341.8434203651287" z="0.0" />
    <detection t="345" x="243.45560025552658" y="343.26670628447874" z="0.0" />
    <detection t="346" x="243.61146934324987" y="343.5711669385198" z="0.0" />
    <detection t="347" x="243.83801976376046" y="342.96228816978845" z="0.0" />
    <detection t="348" x="242.9987448455195" y="344.4455437528835" z="0.0" />
    <detection t="349" x="244.53189004394736" y="342.0078766222082" z="0.0" />
    <detection t="350" x="244.34965344834637" y="343.02688623587517" z="0.0" />
    <detection t="351" x="243.8899311155621" y="343.3285175237478" z="0.0" />
    <detection t="352" x="244.59725347231222" y="342.0048286810631" z="0.0" />
    <detection t="353" x="243.52028104888703" y="344.47565287780327" z="0.0" />
    <detection t="354" x="244.29826473413237" y="342.8570633744583" z="0.0" />
    <detection t="355" x="244.30052144629457" y="342.99555539921687" z="0.0" />
    <detection t="356" x="243.70506807052263" y="343.0183113237741" z="0.0" />
    <detection t="357" x="243.28513596224477" y="343.8185131654382" z="0.0" />
    <detection t="358" x="244.24033217453552" y="340.56662412765445" z="0.0" />
    <detection t="359" x="243.2006970168961" y="344.420715387274" z="0.0" />
    <detection t="360" x="244.684150293526" y="341.8563535283276" z="0.0" />
    <detection t="361" x="242.79704753963534" y="345.3346461335017" z="0.0" />
    <detection t="362" x="245.1256494790178" y="340.7155555856981" z="0.0" />
    <detection t="363" x="243.43505644221293" y="343.52183602658016" z="0.0" />
    <detection t="364" x="243.76245677105868" y="342.6789073191635" z="0.0" />
    <detection t="365" x="244.36624707894734" y="341.00138964545346" z="0.0" />
    <detection t="366" x="243.48182126322845" y="343.34671295963653" z="0.0" />
    <detection t="367" x="244.36612799351553" y="342.97361896070953" z="0.0" />
    <detection t="368" x="244.28544615230507" y="343.0196835449454" z="0.0" />
    <detection t="369" x="243.9918391044588" y="341.9738751277761" z="0.0" />
    <detection t="370" x="244.356133617931" y="341.98960945024294" z="0.0" />
    <detection t="371" x="244.17931472470275" y="342.16236923575025" z="0.0" />
    <detection t="372" x="244.38692184359687" y="341.8314572170186" z="0.0" />
    <detection t="373" x="243.65087773472203" y="342.59138919263756" z="0.0" />
    <detection t="374" x="244.57459854795192" y="341.63940523898384" z="0.0" />
    <detection t="375" x="245.07225857645057" y="341.2326181071784" z="0.0" />
    <detection t="376" x="244.22871353067043" y="341.7128310917319" z="0.0" />
    <detection t="377" x="243.46798496748812" y="343.21456788011784" z="0.0" />
    <detection t="378" x="243.49524237527018" y="343.19985814898024" z="0.0" />
    <detection t="379" x="244.3319616508302" y="341.34411440741684" z="0.0" />
    <detection t="380" x="244.26849286041625" y="340.8826798204739" z="0.0" />
    <detection t="381" x="243.69694698628834" y="343.80897169165434" z="0.0" />
    <detection t="382" x="243.05531790117837" y="343.0496816951775" z="0.0" />
    <detection t="383" x="245.22933627814572" y="342.098178283379" z="0.0" />
    <detection t="384" x="244.1773775615671" y="342.0866793186716" z="0.0" />
    <detection t="385" x="244.05381386437188" y="343.1986540072997" z="0.0" />
    <detection t="386" x="244.39408135404767" y="343.0590385164544" z="0.0" />
    <detection t="387" x="244.029849787628" y="341.799236633735" z="0.0" />
    <detection t="388" x="244.41273898106763" y="342.9297465071306" z="0.0" />
    <detection t="389" x="243.38574793216543" y="343.89761570768064" z="0.0" />
    <detection t="390" x="244.80173685047862" y="342.34157096869154" z="0.0" />
    <detection t="391" x="243.8999469257682" y="342.2077572230232" z="0.0" />
    <detection t="392" x="244.2191729615871" y="341.7426656523668" z="0.0" />
    <detection t="393" x="243.915328727274" y="344.06763353318195" z="0.0" />
    <detection t="394" x="243.4415543697379" y="343.98295208404966" z="0.0" />
    <detection t="395" x="244.51336333169854" y="340.9535718045827" z="0.0" />
    <detection t="396" x="244.0578574443905" y="340.76423989781983" z="0.0" />
    <detection t="397" x="243.91245008403266" y="342.4466517945998" z="0.0" />
    <detection t="398" x="244.03217143811293" y="342.941214824612" z="0.0" />
    <detection t="399" x="244.1978782956599" y="343.04819686933433" z="0.0" />
    <detection t="400" x="243.73848748492992" y="342.6923449762576" z="0.0" />
    <detection t="401" x="243.89549270565465" y="342.41288249577525" z="0.0" />
    <detection t="402" x="244.2027325288378" y="342.31964117700846" z="0.0" />
    <detection t="403" x="244.52214352565608" y="342.2141644112634" z="0.0" />
    <detection t="404" x="244.16389875975014" y="342.82614102449804" z="0.0" />
    <detection t="405" x="244.25840167031296" y="342.9235744923958" z="0.0" />
    <detection t="406" x="243.915427504851" y="342.9676938303268" z="0.0" />
    <detection t="407" x="243.85979259116152" y="342.3909778085828" z="0.0" />
    <detection t="408" x="243.33502250187024" y="343.4487765289997" z="0.0" />
    <detection t="409" x="243.7338581741474" y="342.6558379785023" z="0.0" />
    <detection t="410" x="243.0183864691459" y="344.26253253042063" z="0.0" />
    <detection t="411" x="244.16996138307113" y="342.57292842666914" z="0.0" />
    <detection t="412" x="244.13527769590496" y="342.0666091951257" z="0.0" />
    <detection t="413" x="243.026431280147" y="342.424675183517" z="0.0" />
    <detection t="414" x="244.17478407619075" y="341.53275460008894" z="0.0" />
    <detection t="415" x="243.8382276918444" y="342.7102356575479" z="0.0" />
    <detection t="416" x="244.13947269149944" y="342.0957901406573" z="0.0" />
    <detection t="417" x="244.05220740421703" y="341.31859106947417" z="0.0" />
    <detection t="418" x="243.85793638400204" y="340.8446018674191" z="0.0" />
    <detection t="419" x="244.09058094003132" y="341.76507450664" z="0.0" />
    <detection t="420" x="244.73533480541968" y="341.2792053882503" z="0.0" />
    <detection t="421" x="243.58544871761143" y="342.9334984777053" z="0.0" />
    <detection t="422" x="243.431320056101" y="343.2301651661782" z="0.0" />
    <detection t="423" x="244.10975559275707" y="340.14118211428126" z="0.0" />
  </particle>
</Tracks>

Apologies in advance because this sounds like a rather trivial problem on the surface, but I am quite new to Matlab, and I have no clue how to even begin looking for these NaN values.

[mr-september]

Not sure if I am on the right track, but I did notice that the mmsd object generated from mmsd = ma.getMeanMSD contains only Inf or NaN values.

In the getMeanMSD.m, lines 109-110 appear to be relevant:

% Standard deviation
mstd = sqrt( sum_weight ./ (sum_weight.^2 - sum_square_weight) .* sum_weighted_variance );

[mr-september]

After some more thought on this, I think it's a misunderstanding on my part on what is being done.

Typically, there are multiple particles/spots and tracks, from which statistics like mean, std deviation arise.

In my case, since only 1 particle is tracked, inf/NaN values should be expected for std deviation.

In a similar vein, it also makes no sense to "fit" a graph onto a single sampled curve.

Assuming this misunderstanding is the cause, I will close this issue. Please re-open if I am wrong!