search

IEEERobotics / high-level

CV, localization, mapping, planning, and generally anything that will run on the PandaBoard
BSD 2-Clause "Simplified" License
2 stars 1 forks source link

MATLAB visualization #12

Closed dfarrell07 closed 11 years ago

dfarrell07 commented 11 years ago

I'm trying to get a MATLAB script working properly, with very little background in MATLAB. I hope this will be obvious to someone with more experience, since I have lots of other work in the nav package that I need to focus on, and asking for help seems more efficient than continuing trying to debug MATLAB.

Using these files, I'd like to execute the MATLAB script and see the resulting visualization. The script takes two input files, a course description and a path solution. Two example pairs, env1.cfg/sol1.txt and env2.cfg/sol2.txt, are included in the previously linked Gist. It also takes a resolution, which I gave as .025 (same value used in env1.cfg). There is no other documentation on this script, most regrettably.

For my attempts, I reserved and used the Matlab R2012b (Win7) VM from NCSU's VCL. After storing those example files locally on the machine's Desktop, renaming the .cfg files to be .txt files so MATLAB can identify them, and adding my Desktop to MATLAB's path (when prompted), I ran:

>> plot_3Dpath('C:\Users\drfarrel\Desktop\sol1.txt', 'C:\Users\drfarrel\Desktop\env1.txt', .025)
reading in map of size 15 by 15

Which gives no apparent result other than the printed line I included above. Since I'm not getting any obvious errors, I'm not sure what's going wrong. There are no files generated and placed in MATLAB's directory or the Desktop. No new windows, like I would expect for a plot, are displayed.

How can I view the result of this script?

ealamaster commented 11 years ago

I'm guessing the problem is that you're ending your plot statements with semicolons, which counter-intuitively means "suppress output" in MATLAB.

-Ethan

On Thu, Mar 21, 2013 at 4:16 AM, Daniel Farrell notifications@github.comwrote:

I'm trying to get a MATLAB script working properly, with very little background in MATLAB. I hope this will be obvious to someone with more experience, since I have lots of other work in the nav package that I need to focus on, and asking for help seems more efficient than continuing trying to debug MATLAB.

Using these files https://gist.github.com/dfarrell07/5210909, I'd like to execute the MATLAB script and see the resulting visualization. The script takes two input files, a course description and a path solution. Two example pairs, env1.cfg/sol1.txt and env2.cfg/sol2.txt, are included in the previously linked Gist. It also takes a resolution, which I gave as .025 (same value used in env1.cfg). There is no other documentation on this script, most regrettably.

For my attempts, I reserved and used the Matlab R2012b (Win7) VM from NCSU's VCL. After storing those example files locally on the machine's Desktop, renaming the .cfg files to be .txt files so MATLAB can identify them, and adding my Desktop to MATLAB's path (when prompted), I ran:

plot_3Dpath('C:\Users\drfarrel\Desktop\sol1.txt', 'C:\Users\drfarrel\Desktop\env1.txt', .025)reading in map of size 15 by 15

Which gives no apparent result other than the printed line I included above. Since I'm not getting any obvious errors, I'm not sure what's going wrong. There are no files generated and placed in MATLAB's directory or the Desktop. No new windows, like I would expect for a plot, are displayed.

How can I view the result of this script?

— Reply to this email directly or view it on GitHubhttps://github.com/NCSUhardware/high-level/issues/12 .

R00ney commented 11 years ago

I would second Ethan's answer.

Matlab commands can all run with-out the semicolon's.

To actually see the output you are looking for, either un-semicolon the line where that variable is stored to, or at the end of the script, simply type the names of the specific outputs you want to see.

The only difference in the above is that in 1) the variable and its value will be displayed every time that command executes, where as in 2) the variable and value will be displayed only once, after every thing has executed.

This is my short answer.

I am looking into it in more detail right now, and hope to have a more complete answer for you soon.

Neal

On Thu, Mar 21, 2013 at 10:24 AM, ealamaster notifications@github.comwrote:

I'm guessing the problem is that you're ending your plot statements with semicolons, which counter-intuitively means "suppress output" in MATLAB.

-Ethan

On Thu, Mar 21, 2013 at 4:16 AM, Daniel Farrell notifications@github.comwrote:

I'm trying to get a MATLAB script working properly, with very little background in MATLAB. I hope this will be obvious to someone with more experience, since I have lots of other work in the nav package that I need to focus on, and asking for help seems more efficient than continuing trying to debug MATLAB.

Using these files https://gist.github.com/dfarrell07/5210909, I'd like to execute the MATLAB script and see the resulting visualization. The script takes two input files, a course description and a path solution. Two example pairs, env1.cfg/sol1.txt and env2.cfg/sol2.txt, are included in the previously linked Gist. It also takes a resolution, which I gave as .025 (same value used in env1.cfg). There is no other documentation on this script, most regrettably.

For my attempts, I reserved and used the Matlab R2012b (Win7) VM from NCSU's VCL. After storing those example files locally on the machine's Desktop, renaming the .cfg files to be .txt files so MATLAB can identify them, and adding my Desktop to MATLAB's path (when prompted), I ran:

plot_3Dpath('C:\Users\drfarrel\Desktop\sol1.txt', 'C:\Users\drfarrel\Desktop\env1.txt', .025)reading in map of size 15 by 15

Which gives no apparent result other than the printed line I included above. Since I'm not getting any obvious errors, I'm not sure what's going wrong. There are no files generated and placed in MATLAB's directory or the Desktop. No new windows, like I would expect for a plot, are displayed.

How can I view the result of this script?

— Reply to this email directly or view it on GitHub< https://github.com/NCSUhardware/high-level/issues/12> .

— Reply to this email directly or view it on GitHubhttps://github.com/NCSUhardware/high-level/issues/12#issuecomment-15241308 .

R00ney commented 11 years ago

Output_of_Sol1 Output_of_Sol2

Hey Daniel,

Actually, your code runs fine and does output a nice interactive plot.

See attached pictures for what I saw by running the same command and input files you did.

I suspect there was an error in your VCL connection where it didn't actually open the plot windows.

Let me know if I can help any further with Matlab stuff, as I'm feel pretty decent with programming in Matlab.

Neal

On Thu, Mar 21, 2013 at 12:04 PM, Neal O'Hara ngo1991@gmail.com wrote:

I would second Ethan's answer.

Matlab commands can all run with-out the semicolon's.

To actually see the output you are looking for, either un-semicolon the line where that variable is stored to, or at the end of the script, simply type the names of the specific outputs you want to see.

The only difference in the above is that in 1) the variable and its value will be displayed every time that command executes, where as in 2) the variable and value will be displayed only once, after every thing has executed.

This is my short answer.

I am looking into it in more detail right now, and hope to have a more complete answer for you soon.

Neal

On Thu, Mar 21, 2013 at 10:24 AM, ealamaster notifications@github.comwrote:

I'm guessing the problem is that you're ending your plot statements with semicolons, which counter-intuitively means "suppress output" in MATLAB.

-Ethan

On Thu, Mar 21, 2013 at 4:16 AM, Daniel Farrell notifications@github.comwrote:

I'm trying to get a MATLAB script working properly, with very little background in MATLAB. I hope this will be obvious to someone with more experience, since I have lots of other work in the nav package that I need to focus on, and asking for help seems more efficient than continuing trying to debug MATLAB.

Using these files https://gist.github.com/dfarrell07/5210909, I'd like to execute the MATLAB script and see the resulting visualization. The script takes two input files, a course description and a path solution. Two example pairs, env1.cfg/sol1.txt and env2.cfg/sol2.txt, are included in the previously linked Gist. It also takes a resolution, which I gave as .025 (same value used in env1.cfg). There is no other documentation on this script, most regrettably.

For my attempts, I reserved and used the Matlab R2012b (Win7) VM from NCSU's VCL. After storing those example files locally on the machine's Desktop, renaming the .cfg files to be .txt files so MATLAB can identify them, and adding my Desktop to MATLAB's path (when prompted), I ran:

plot_3Dpath('C:\Users\drfarrel\Desktop\sol1.txt', 'C:\Users\drfarrel\Desktop\env1.txt', .025)reading in map of size 15 by 15

Which gives no apparent result other than the printed line I included above. Since I'm not getting any obvious errors, I'm not sure what's going wrong. There are no files generated and placed in MATLAB's directory or the Desktop. No new windows, like I would expect for a plot, are displayed.

How can I view the result of this script?

— Reply to this email directly or view it on GitHub< https://github.com/NCSUhardware/high-level/issues/12> .

— Reply to this email directly or view it on GitHubhttps://github.com/NCSUhardware/high-level/issues/12#issuecomment-15241308 .

dfarrell07 commented 11 years ago

Awesome, thanks for the quick help @R00ney and @ealamaster. I'll look into getting a copy of MATLAB from NCSU now, to avoid any problems that may have been caused by my rdesktop connection to the VCL machine.