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rafaqz / DimensionalData.jl

Named dimensions and indexing for julia arrays and other data
https://rafaqz.github.io/DimensionalData.jl/stable/
MIT License
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Selecting out of bounds `..` on a `DimArray` should throw BoundsError #577

Open felixcremer opened 8 months ago

felixcremer commented 8 months ago

When I subset a Raster with the wrong year I get the error below. I tried to reduce this to a artificially created DimArray but failed. I would have expected this to fail already during the subsetting but maybe there is a use case for it to return a zero dimension. 


url = "http://esgf1.dkrz.de/thredds/fileServer/cosmo-rea/reanalysis/EUR-6km/DWD/ECMWF-ERAINT/REA6/r1i1p1f1/COSMO/v1/mon/atmos/tas/v20230314/tas_EUR-6km_ECMWF-ERAINT_REA6_r1i1p1f1_COSMO_v1_mon_199601-199612.nc"
filename = split(url, "/")[end]
mkpath("data/")
p = "data/$filename"
if !isfile(p)
  download(url, p)
end
r = Raster(p, key="tas")

julia> summer = r[Ti=Date(1995,4,1)..Date(1995, 10,1)]
104×142×0 Raster{Union{Missing, Float32},3} tas with dimensions: 
  X Sampled{Float64} Float64[-7.557552218296486, -7.502551037136502, …, -1.9474317399783132, -1.8924305588183294] ForwardOrdered Explicit Intervals{Center},
  Y Sampled{Float64} Float64[-3.1625523990153646, -3.107551183040055, …, 4.537617837528135, 4.592619053503444] ForwardOrdered Explicit Intervals{Center},
  Ti Sampled{DateTime} DateTime[] ForwardOrdered Explicit Intervals{Center}
extent: ERROR: BoundsError: attempt to access 2×0 Matrix{DateTime} at index [1, 1]
Stacktrace:
  [1] getindex
    @ ./essentials.jl:14 [inlined]
  [2] _bounds
    @ ~/.julia/packages/DimensionalData/lbGZS/src/LookupArrays/lookup_arrays.jl:204 [inlined]
  [3] _bounds
    @ ~/.julia/packages/DimensionalData/lbGZS/src/LookupArrays/lookup_arrays.jl:202 [inlined]
  [4] _bounds
    @ ~/.julia/packages/DimensionalData/lbGZS/src/LookupArrays/lookup_arrays.jl:198 [inlined]
  [5] bounds
    @ ~/.julia/packages/DimensionalData/lbGZS/src/LookupArrays/lookup_arrays.jl:194 [inlined]
  [6] bounds
    @ ~/.julia/packages/DimensionalData/lbGZS/src/Dimensions/dimension.jl:193 [inlined]
  [7] map
    @ ./tuple.jl:275 [inlined]
  [8] bounds
    @ ~/.julia/packages/DimensionalData/lbGZS/src/Dimensions/dimension.jl:222 [inlined]
  [9] extent
    @ ~/.julia/packages/DimensionalData/lbGZS/src/Dimensions/dimension.jl:277 [inlined]
 [10] extent
    @ ~/.julia/packages/DimensionalData/lbGZS/src/array/array.jl:65 [inlined]
 [11] show_after(io::IOContext{Base.TTY}, mime::MIME{Symbol("text/plain")}, A::Raster{Union{Missing, Float32}, 3, Tuple{X{DimensionalData.Dimensions.LookupArrays.Sampled{Float64, Vector{Float64}, DimensionalData.Dimensions.LookupArrays.ForwardOrdered, DimensionalData.Dimensions.LookupArrays.Explicit{Matrix{Float64}}, DimensionalData.Dimensions.LookupArrays.Intervals{DimensionalData.Dimensions.LookupArrays.Center}, DimensionalData.Dimensions.LookupArrays.Metadata{Rasters.NCDsource, Dict{String, Any}}}}, Y{DimensionalData.Dimensions.LookupArrays.Sampled{Float64, Vector{Float64}, DimensionalData.Dimensions.LookupArrays.ForwardOrdered, DimensionalData.Dimensions.LookupArrays.Explicit{Matrix{Float64}}, DimensionalData.Dimensions.LookupArrays.Intervals{DimensionalData.Dimensions.LookupArrays.Center}, DimensionalData.Dimensions.LookupArrays.Metadata{Rasters.NCDsource, Dict{String, Any}}}}, Ti{DimensionalData.Dimensions.LookupArrays.Sampled{DateTime, Vector{DateTime}, DimensionalData.Dimensions.LookupArrays.ForwardOrdered, DimensionalData.Dimensions.LookupArrays.Explicit{Matrix{DateTime}}, DimensionalData.Dimensions.LookupArrays.Intervals{DimensionalData.Dimensions.LookupArrays.Center}, DimensionalData.Dimensions.LookupArrays.Metadata{Rasters.NCDsource, Dict{String, Any}}}}}, Tuple{}, Array{Union{Missing, Float32}, 3}, Symbol, DimensionalData.Dimensions.LookupArrays.Metadata{Rasters.NCDsource, Dict{String, Any}}, Missing})
    @ Rasters ~/.julia/packages/Rasters/k5UxK/src/show.jl:5
 [12] show(io::IOContext{Base.TTY}, mime::MIME{Symbol("text/plain")}, A::Raster{Union{Missing, Float32}, 3, Tuple{X{DimensionalData.Dimensions.LookupArrays.Sampled{Float64, Vector{Float64}, DimensionalData.Dimensions.LookupArrays.ForwardOrdered, DimensionalData.Dimensions.LookupArrays.Explicit{Matrix{Float64}}, DimensionalData.Dimensions.LookupArrays.Intervals{DimensionalData.Dimensions.LookupArrays.Center}, DimensionalData.Dimensions.LookupArrays.Metadata{Rasters.NCDsource, Dict{String, Any}}}}, Y{DimensionalData.Dimensions.LookupArrays.Sampled{Float64, Vector{Float64}, DimensionalData.Dimensions.LookupArrays.ForwardOrdered, DimensionalData.Dimensions.LookupArrays.Explicit{Matrix{Float64}}, DimensionalData.Dimensions.LookupArrays.Intervals{DimensionalData.Dimensions.LookupArrays.Center}, DimensionalData.Dimensions.LookupArrays.Metadata{Rasters.NCDsource, Dict{String, Any}}}}, Ti{DimensionalData.Dimensions.LookupArrays.Sampled{DateTime, Vector{DateTime}, DimensionalData.Dimensions.LookupArrays.ForwardOrdered, DimensionalData.Dimensions.LookupArrays.Explicit{Matrix{DateTime}}, DimensionalData.Dimensions.LookupArrays.Intervals{DimensionalData.Dimensions.LookupArrays.Center}, DimensionalData.Dimensions.LookupArrays.Metadata{Rasters.NCDsource, Dict{String, Any}}}}}, Tuple{}, Array{Union{Missing, Float32}, 3}, Symbol, DimensionalData.Dimensions.LookupArrays.Metadata{Rasters.NCDsource, Dict{String, Any}}, Missing})
    @ DimensionalData ~/.julia/packages/DimensionalData/lbGZS/src/array/show.jl:27
 [13] (::REPL.var"#55#56"{REPL.REPLDisplay{REPL.LineEditREPL}, MIME{Symbol("text/plain")}, Base.RefValue{Any}})(io::Any)
    @ REPL ~/.julia/juliaup/julia-1.9.4+0.x64.linux.gnu/share/julia/stdlib/v1.9/REPL/src/REPL.jl:276
 [14] with_repl_linfo(f::Any, repl::REPL.LineEditREPL)
    @ REPL ~/.julia/juliaup/julia-1.9.4+0.x64.linux.gnu/share/julia/stdlib/v1.9/REPL/src/REPL.jl:557
 [15] display(d::REPL.REPLDisplay, mime::MIME{Symbol("text/plain")}, x::Any)
    @ REPL ~/.julia/juliaup/julia-1.9.4+0.x64.linux.gnu/share/julia/stdlib/v1.9/REPL/src/REPL.jl:262
 [16] display(d::REPL.REPLDisplay, x::Any)
    @ REPL ~/.julia/juliaup/julia-1.9.4+0.x64.linux.gnu/share/julia/stdlib/v1.9/REPL/src/REPL.jl:281
 [17] display(x::Any)
    @ Base.Multimedia ./multimedia.jl:340
 [18] #invokelatest#2
    @ ./essentials.jl:819 [inlined]
 [19] invokelatest
    @ ./essentials.jl:816 [inlined]
 [20] (::VSCodeServer.var"#67#72"{Bool, Bool, Bool, Module, String, Int64, Int64, String, VSCodeServer.ReplRunCodeRequestParams})()
    @ VSCodeServer ~/.vscode/extensions/julialang.language-julia-1.61.2/scripts/packages/VSCodeServer/src/eval.jl:229
 [21] withpath(f::VSCodeServer.var"#67#72"{Bool, Bool, Bool, Module, String, Int64, Int64, String, VSCodeServer.ReplRunCodeRequestParams}, path::String)
    @ VSCodeServer ~/.vscode/extensions/julialang.language-julia-1.61.2/scripts/packages/VSCodeServer/src/repl.jl:274
 [22] (::VSCodeServer.var"#66#71"{Bool, Bool, Bool, Module, String, Int64, Int64, String, VSCodeServer.ReplRunCodeRequestParams})()
    @ VSCodeServer ~/.vscode/extensions/julialang.language-julia-1.61.2/scripts/packages/VSCodeServer/src/eval.jl:179
 [23] hideprompt(f::VSCodeServer.var"#66#71"{Bool, Bool, Bool, Module, String, Int64, Int64, String, VSCodeServer.ReplRunCodeRequestParams})
    @ VSCodeServer ~/.vscode/extensions/julialang.language-julia-1.61.2/scripts/packages/VSCodeServer/src/repl.jl:38
 [24] (::VSCodeServer.var"#65#70"{Bool, Bool, Bool, Module, String, Int64, Int64, String, VSCodeServer.ReplRunCodeRequestParams})()
    @ VSCodeServer ~/.vscode/extensions/julialang.language-julia-1.61.2/scripts/packages/VSCodeServer/src/eval.jl:150
 [25] with_logstate(f::Function, logstate::Any)
    @ Base.CoreLogging ./logging.jl:514
 [26] with_logger
    @ ./logging.jl:626 [inlined]
 [27] (::VSCodeServer.var"#64#69"{VSCodeServer.ReplRunCodeRequestParams})()
    @ VSCodeServer ~/.vscode/extensions/julialang.language-julia-1.61.2/scripts/packages/VSCodeServer/src/eval.jl:255
 [28] #invokelatest#2
    @ ./essentials.jl:819 [inlined]
 [29] invokelatest(::Any)
    @ Base ./essentials.jl:816
 [30] macro expansion
    @ ~/.vscode/extensions/julialang.language-julia-1.61.2/scripts/packages/VSCodeServer/src/eval.jl:34 [inlined]
 [31] (::VSCodeServer.var"#62#63")()
    @ VSCodeServer ./task.jl:514
rafaqz commented 8 months ago

I think it used to error, we mustn't have actually tested that it did.

But now Im not sure if it should? A zero length range is allowed in indexing.

felixcremer commented 8 months ago

Yes, a zero length range is allowed, but this is a range which is not empty but has no overlap to the range of the time axis of the DimArray. Sorry I was not clear. In this example the time axis of the array is the month from 1996 but I am trying to subset with a interval from 1995. One gets an Array back with one dimension zero which can't be used for anything afterwards. 

julia> dims(r,Ti)
Ti Sampled{DateTime} ForwardOrdered Explicit DimensionalData.Dimensions.LookupArrays.Intervals{DimensionalData.Dimensions.LookupArrays.Center}
wrapping: 12-element Vector{DateTime}:
 1996-01-16T12:00:00
 1996-02-15T12:00:00
 1996-03-16T12:00:00
 1996-04-16T00:00:00
 1996-05-16T12:00:00
 1996-06-16T00:00:00
 1996-07-16T12:00:00
 1996-08-16T12:00:00
 1996-09-16T00:00:00
 1996-10-16T12:00:00
 1996-11-16T00:00:00
 1996-12-16T12:00:00

The other case would be to have a zero length interval and then the subsetting should work and return a slice of the data. This also works for an MWE but it fails as well for the example data with a time axis:

julia> summer = rger[Ti=Date(1996,4,1)..Date(1996, 4,1)]
104×142×0 Raster{Union{Missing, Float32},3} tas with dimensions: 
  X Sampled{Float64} Float64[-7.557552218296486, -7.502551037136502, …, -1.9474317399783132, -1.8924305588183294] ForwardOrdered Explicit Intervals{Center},
  Y Sampled{Float64} Float64[-3.1625523990153646, -3.107551183040055, …, 4.537617837528135, 4.592619053503444] ForwardOrdered Explicit Intervals{Center},
  Ti Sampled{DateTime} DateTime[] ForwardOrdered Explicit Intervals{Center}
extent: Error showing value of type Raster{Union{Missing, Float32}, 3, Tuple{X{DimensionalData.Dimensions.LookupArrays.Sampled{Float64, Vector{Float64}, DimensionalData.Dimensions.LookupArrays.ForwardOrdered, DimensionalData.Dimensions.LookupArrays.Explicit{Matrix{Float64}}, DimensionalData.Dimensions.LookupArrays.Intervals{DimensionalData.Dimensions.LookupArrays.Center}, DimensionalData.Dimensions.LookupArrays.Metadata{Rasters.NCDsource, Dict{String, Any}}}}, Y{DimensionalData.Dimensions.LookupArrays.Sampled{Float64, Vector{Float64}, DimensionalData.Dimensions.LookupArrays.ForwardOrdered, DimensionalData.Dimensions.LookupArrays.Explicit{Matrix{Float64}}, DimensionalData.Dimensions.LookupArrays.Intervals{DimensionalData.Dimensions.LookupArrays.Center}, DimensionalData.Dimensions.LookupArrays.Metadata{Rasters.NCDsource, Dict{String, Any}}}}, Ti{DimensionalData.Dimensions.LookupArrays.Sampled{DateTime, Vector{DateTime}, DimensionalData.Dimensions.LookupArrays.ForwardOrdered, DimensionalData.Dimensions.LookupArrays.Explicit{Matrix{DateTime}}, DimensionalData.Dimensions.LookupArrays.Intervals{DimensionalData.Dimensions.LookupArrays.Center}, DimensionalData.Dimensions.LookupArrays.Metadata{Rasters.NCDsource, Dict{String, Any}}}}}, Tuple{}, Array{Union{Missing, Float32}, 3}, Symbol, DimensionalData.Dimensions.LookupArrays.Metadata{Rasters.NCDsource, Dict{String, Any}}, Missing}:
ERROR: BoundsError: attempt to access 2×0 Matrix{DateTime} at index [1, 1]
Stacktrace:
  [1] getindex
    @ ./essentials.jl:14 [inlined]
  [2] _bounds
    @ ~/.julia/packages/DimensionalData/lbGZS/src/LookupArrays/lookup_arrays.jl:204 [inlined]
  [3] _bounds
    @ ~/.julia/packages/DimensionalData/lbGZS/src/LookupArrays/lookup_arrays.jl:202 [inlined]
  [4] _bounds
    @ ~/.julia/packages/DimensionalData/lbGZS/src/LookupArrays/lookup_arrays.jl:198 [inlined]
  [5] bounds
    @ ~/.julia/packages/DimensionalData/lbGZS/src/LookupArrays/lookup_arrays.jl:194 [inlined]
  [6] bounds
    @ ~/.julia/packages/DimensionalData/lbGZS/src/Dimensions/dimension.jl:193 [inlined]
  [7] map
    @ ./tuple.jl:275 [inlined]
  [8] bounds
    @ ~/.julia/packages/DimensionalData/lbGZS/src/Dimensions/dimension.jl:222 [inlined]
  [9] extent
    @ ~/.julia/packages/DimensionalData/lbGZS/src/Dimensions/dimension.jl:277 [inlined]
 [10] extent
    @ ~/.julia/packages/DimensionalData/lbGZS/src/array/array.jl:65 [inlined]
 [11] show_after(io::IOContext{Base.TTY}, mime::MIME{Symbol("text/plain")}, A::Raster{Union{Missing, Float32}, 3, Tuple{X{DimensionalData.Dimensions.LookupArrays.Sampled{Float64, Vector{Float64}, DimensionalData.Dimensions.LookupArrays.ForwardOrdered, DimensionalData.Dimensions.LookupArrays.Explicit{Matrix{Float64}}, DimensionalData.Dimensions.LookupArrays.Intervals{DimensionalData.Dimensions.LookupArrays.Center}, DimensionalData.Dimensions.LookupArrays.Metadata{Rasters.NCDsource, Dict{String, Any}}}}, Y{DimensionalData.Dimensions.LookupArrays.Sampled{Float64, Vector{Float64}, DimensionalData.Dimensions.LookupArrays.ForwardOrdered, DimensionalData.Dimensions.LookupArrays.Explicit{Matrix{Float64}}, DimensionalData.Dimensions.LookupArrays.Intervals{DimensionalData.Dimensions.LookupArrays.Center}, DimensionalData.Dimensions.LookupArrays.Metadata{Rasters.NCDsource, Dict{String, Any}}}}, Ti{DimensionalData.Dimensions.LookupArrays.Sampled{DateTime, Vector{DateTime}, DimensionalData.Dimensions.LookupArrays.ForwardOrdered, DimensionalData.Dimensions.LookupArrays.Explicit{Matrix{DateTime}}, DimensionalData.Dimensions.LookupArrays.Intervals{DimensionalData.Dimensions.LookupArrays.Center}, DimensionalData.Dimensions.LookupArrays.Metadata{Rasters.NCDsource, Dict{String, Any}}}}}, Tuple{}, Array{Union{Missing, Float32}, 3}, Symbol, DimensionalData.Dimensions.LookupArrays.Metadata{Rasters.NCDsource, Dict{String, Any}}, Missing})
    @ Rasters ~/.julia/packages/Rasters/k5UxK/src/show.jl:5
 [12] show(io::IOContext{Base.TTY}, mime::MIME{Symbol("text/plain")}, A::Raster{Union{Missing, Float32}, 3, Tuple{X{DimensionalData.Dimensions.LookupArrays.Sampled{Float64, Vector{Float64}, DimensionalData.Dimensions.LookupArrays.ForwardOrdered, DimensionalData.Dimensions.LookupArrays.Explicit{Matrix{Float64}}, DimensionalData.Dimensions.LookupArrays.Intervals{DimensionalData.Dimensions.LookupArrays.Center}, DimensionalData.Dimensions.LookupArrays.Metadata{Rasters.NCDsource, Dict{String, Any}}}}, Y{DimensionalData.Dimensions.LookupArrays.Sampled{Float64, Vector{Float64}, DimensionalData.Dimensions.LookupArrays.ForwardOrdered, DimensionalData.Dimensions.LookupArrays.Explicit{Matrix{Float64}}, DimensionalData.Dimensions.LookupArrays.Intervals{DimensionalData.Dimensions.LookupArrays.Center}, DimensionalData.Dimensions.LookupArrays.Metadata{Rasters.NCDsource, Dict{String, Any}}}}, Ti{DimensionalData.Dimensions.LookupArrays.Sampled{DateTime, Vector{DateTime}, DimensionalData.Dimensions.LookupArrays.ForwardOrdered, DimensionalData.Dimensions.LookupArrays.Explicit{Matrix{DateTime}}, DimensionalData.Dimensions.LookupArrays.Intervals{DimensionalData.Dimensions.LookupArrays.Center}, DimensionalData.Dimensions.LookupArrays.Metadata{Rasters.NCDsource, Dict{String, Any}}}}}, Tuple{}, Array{Union{Missing, Float32}, 3}, Symbol, DimensionalData.Dimensions.LookupArrays.Metadata{Rasters.NCDsource, Dict{String, Any}}, Missing})
    @ DimensionalData ~/.julia/packages/DimensionalData/lbGZS/src/array/show.jl:27
 [13] (::REPL.var"#55#56"{REPL.REPLDisplay{REPL.LineEditREPL}, MIME{Symbol("text/plain")}, Base.RefValue{Any}})(io::Any)
    @ REPL ~/.julia/juliaup/julia-1.9.4+0.x64.linux.gnu/share/julia/stdlib/v1.9/REPL/src/REPL.jl:276
 [14] with_repl_linfo(f::Any, repl::REPL.LineEditREPL)
    @ REPL ~/.julia/juliaup/julia-1.9.4+0.x64.linux.gnu/share/julia/stdlib/v1.9/REPL/src/REPL.jl:557
 [15] display(d::REPL.REPLDisplay, mime::MIME{Symbol("text/plain")}, x::Any)
    @ REPL ~/.julia/juliaup/julia-1.9.4+0.x64.linux.gnu/share/julia/stdlib/v1.9/REPL/src/REPL.jl:262
 [16] display(d::REPL.REPLDisplay, x::Any)
    @ REPL ~/.julia/juliaup/julia-1.9.4+0.x64.linux.gnu/share/julia/stdlib/v1.9/REPL/src/REPL.jl:281
 [17] display(x::Any)
    @ Base.Multimedia ./multimedia.jl:340
 [18] #invokelatest#2
    @ ./essentials.jl:819 [inlined]
 [19] invokelatest
    @ ./essentials.jl:816 [inlined]
 [20] print_response(errio::IO, response::Any, show_value::Bool, have_color::Bool, specialdisplay::Union{Nothing, AbstractDisplay})
    @ REPL ~/.julia/juliaup/julia-1.9.4+0.x64.linux.gnu/share/julia/stdlib/v1.9/REPL/src/REPL.jl:305
 [21] (::REPL.var"#57#58"{REPL.LineEditREPL, Pair{Any, Bool}, Bool, Bool})(io::Any)
    @ REPL ~/.julia/juliaup/julia-1.9.4+0.x64.linux.gnu/share/julia/stdlib/v1.9/REPL/src/REPL.jl:287
 [22] with_repl_linfo(f::Any, repl::REPL.LineEditREPL)
    @ REPL ~/.julia/juliaup/julia-1.9.4+0.x64.linux.gnu/share/julia/stdlib/v1.9/REPL/src/REPL.jl:557
 [23] print_response(repl::REPL.AbstractREPL, response::Any, show_value::Bool, have_color::Bool)
    @ REPL ~/.julia/juliaup/julia-1.9.4+0.x64.linux.gnu/share/julia/stdlib/v1.9/REPL/src/REPL.jl:285
 [24] (::REPL.var"#do_respond#80"{Bool, Bool, REPL.var"#93#103"{REPL.LineEditREPL, REPL.REPLHistoryProvider}, REPL.LineEditREPL, REPL.LineEdit.Prompt})(s::REPL.LineEdit.MIState, buf::Any, ok::Bool)
    @ REPL ~/.julia/juliaup/julia-1.9.4+0.x64.linux.gnu/share/julia/stdlib/v1.9/REPL/src/REPL.jl:899
 [25] (::VSCodeServer.var"#101#104"{REPL.var"#do_respond#80"{Bool, Bool, REPL.var"#93#103"{REPL.LineEditREPL, REPL.REPLHistoryProvider}, REPL.LineEditREPL, REPL.LineEdit.Prompt}})(mi::REPL.LineEdit.MIState, buf::IOBuffer, ok::Bool)
    @ VSCodeServer ~/.vscode/extensions/julialang.language-julia-1.61.2/scripts/packages/VSCodeServer/src/repl.jl:122
 [26] #invokelatest#2
    @ ./essentials.jl:819 [inlined]
 [27] invokelatest
    @ ./essentials.jl:816 [inlined]
 [28] run_interface(terminal::REPL.Terminals.TextTerminal, m::REPL.LineEdit.ModalInterface, s::REPL.LineEdit.MIState)
    @ REPL.LineEdit ~/.julia/juliaup/julia-1.9.4+0.x64.linux.gnu/share/julia/stdlib/v1.9/REPL/src/LineEdit.jl:2647
 [29] run_frontend(repl::REPL.LineEditREPL, backend::REPL.REPLBackendRef)
    @ REPL ~/.julia/juliaup/julia-1.9.4+0.x64.linux.gnu/share/julia/stdlib/v1.9/REPL/src/REPL.jl:1300
 [30] (::REPL.var"#62#68"{REPL.LineEditREPL, REPL.REPLBackendRef})()
    @ REPL ./task.jl:514
felixcremer commented 8 months ago

For a plain DimArray subsetting with a zero width interval works as expected but I still would expect the out of bounds case to throw a BoundsError:

julia> arr = DimArray(reshape(1:100,10,10), (X(1:10), Y(1:10)))
10×10 DimArray{Int64,2} with dimensions: 
  X Sampled{Int64} 1:10 ForwardOrdered Regular Points,
  Y Sampled{Int64} 1:10 ForwardOrdered Regular Points
      1   2   3   4   5   6   7   8   9   10
  1   1  11  21  31  41  51  61  71  81   91
  2   2  12  22  32  42  52  62  72  82   92
  ⋮                   ⋮                    ⋮
  9   9  19  29  39  49  59  69  79  89   99
 10  10  20  30  40  50  60  70  80  90  100

julia> arr[X=1..1] 
1×10 DimArray{Int64,2} with dimensions: 
  X Sampled{Int64} 1:1 ForwardOrdered Regular Points,
  Y Sampled{Int64} 1:10 ForwardOrdered Regular Points
    1   2   3   4   5   6   7   8   9  10
 1  1  11  21  31  41  51  61  71  81  91

julia> arr[X=100..103] # This should throw a BoundsError
0×10 DimArray{Int64,2} with dimensions: 
  X Sampled{Int64} 11:10 ForwardOrdered Regular Points,
  Y Sampled{Int64} 1:10 ForwardOrdered Regular Points
    1  2  3  4  5  6  7  8  9  10
rafaqz commented 8 months ago

Ah ok that makes sense. Yeah it should be out if bounds.