# Plotting with colorbar and NaN

**URL:** <https://discourse.julialang.org/t/plotting-with-colorbar-and-nan/123165>\
**Category:** General Usage\
**Tags:** plotting\
**Created:** [November 27, 2024, 1:17pm UTC](https://discourse.julialang.org/t/plotting-with-colorbar-and-nan/123165 "2024-11-27T13:17:55Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![gasparalfaro](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/gasparalfaro/32/32802_2.png) [@gasparalfaro](https://discourse.julialang.org/u/gasparalfaro)\
**Post date:** [November 27, 2024, 1:17pm UTC](https://discourse.julialang.org/t/plotting-with-colorbar-and-nan/123165/1 "2024-11-27T13:17:55Z")

</div>

I found a code that I could execute a year ago (last time I executed was November 14th 2023, I think) but with packages updated as today it gives error. I could simplify the code to this MWE:

```julia
y1 = [1 2 3 ; 4 5 6; 7 8 9]

y2 = [1 NaN 3; 4 NaN 6; 7 NaN 9]

y3 = [NaN 2 3; NaN 5 6; NaN 8 9]

y4 = [1 2 3; NaN 5 6; NaN 8 9]

x = [1,2,3]

plot(x,y1, linez = [1,2,3], colorbar = true)

plot(x,y2, linez = [1,2,3], colorbar = true)

plot(x,y3, linez = [1,2,3], colorbar = true)

plot(x,y4, linez = [1,2,3], colorbar = true)

```

The first two plots are well executed, the problem is when the array contains its first column full of NaN or when only one element in first column is not NaN.

The code can execute well if `linez = [1,2,3], colorbar = true` is absent.

The error it produces is the following:

```julia
ERROR: BoundsError: attempt to access 0-element Vector{Any} at index [0]
Stacktrace:
  [1] throw_boundserror(A::Vector{Any}, I::Tuple{Int64})
    @ Base .\essentials.jl:14
  [2] getindex(A::Vector{Any}, i::Int64)
    @ Base .\essentials.jl:916
  [3] _before_layout_calcs(plt::Plots.Plot{Plots.PyPlotBackend})
    @ Plots C:\Users\PC\.julia\packages\Plots\sxUvK\src\backends\deprecated\pyplot.jl:980
  [4] prepare_output(plt::Plots.Plot{Plots.PyPlotBackend})
    @ Plots C:\Users\PC\.julia\packages\Plots\sxUvK\src\plot.jl:232
  [5] show
    @ C:\Users\PC\.julia\packages\Plots\sxUvK\src\output.jl:231 [inlined]
  [6] __binrepr(m::MIME{Symbol("image/svg+xml")}, x::Plots.Plot{Plots.PyPlotBackend}, context::Nothing)
    @ Base.Multimedia .\multimedia.jl:171
  [7] _textrepr
    @ .\multimedia.jl:163 [inlined]
  [8] stringmime(m::MIME{Symbol("image/svg+xml")}, x::Plots.Plot{Plots.PyPlotBackend})
    @ Base64 C:\Users\PC\.julia\juliaup\julia-1.11.1+0.x64.w64.mingw32\share\julia\stdlib\v1.11\Base64\src\Base64.jl:44
  [9] display(d::VSCodeServer.InlineDisplay, m::MIME{Symbol("image/svg+xml")}, x::Any)
    @ VSCodeServer c:\Users\PC\.vscode\extensions\julialang.language-julia-1.127.2\scripts\packages\VSCodeServer\src\display.jl:68
 [10] display(d::VSCodeServer.InlineDisplay, mime::String, x::Any)
    @ Base.Multimedia .\multimedia.jl:228
 [11] display(d::VSCodeServer.InlineDisplay, x::Any)
    @ VSCodeServer c:\Users\PC\.vscode\extensions\julialang.language-julia-1.127.2\scripts\packages\VSCodeServer\src\display.jl:207
 [12] display(x::Any)
    @ Base.Multimedia .\multimedia.jl:340
 [13] #invokelatest#2
    @ .\essentials.jl:1055 [inlined]
 [14] invokelatest
    @ .\essentials.jl:1052 [inlined]
 [15] (::VSCodeServer.var"#69#74"{Bool, Bool, Bool, Module, String, Int64, Int64, String, VSCodeServer.ReplRunCodeRequestParams})()
    @ VSCodeServer c:\Users\PC\.vscode\extensions\julialang.language-julia-1.127.2\scripts\packages\VSCodeServer\src\eval.jl:237
 [16] withpath(f::VSCodeServer.var"#69#74"{Bool, Bool, Bool, Module, String, Int64, Int64, String, VSCodeServer.ReplRunCodeRequestParams}, path::String)
    @ VSCodeServer c:\Users\PC\.vscode\extensions\julialang.language-julia-1.127.2\scripts\packages\VSCodeServer\src\repl.jl:276
 [17] (::VSCodeServer.var"#68#73"{Bool, Bool, Bool, Module, String, Int64, Int64, String, VSCodeServer.ReplRunCodeRequestParams})()
    @ VSCodeServer c:\Users\PC\.vscode\extensions\julialang.language-julia-1.127.2\scripts\packages\VSCodeServer\src\eval.jl:179
 [18] hideprompt(f::VSCodeServer.var"#68#73"{Bool, Bool, Bool, Module, String, Int64, Int64, String, VSCodeServer.ReplRunCodeRequestParams})
    @ VSCodeServer c:\Users\PC\.vscode\extensions\julialang.language-julia-1.127.2\scripts\packages\VSCodeServer\src\repl.jl:38
 [19] #67
    @ c:\Users\PC\.vscode\extensions\julialang.language-julia-1.127.2\scripts\packages\VSCodeServer\src\eval.jl:150 [inlined]
 [20] with_logstate(f::VSCodeServer.var"#67#72"{Bool, Bool, Bool, Module, String, Int64, Int64, String, VSCodeServer.ReplRunCodeRequestParams}, logstate::Base.CoreLogging.LogState)
    @ Base.CoreLogging .\logging\logging.jl:522
 [21] with_logger
    @ .\logging\logging.jl:632 [inlined]
 [22] (::VSCodeServer.var"#66#71"{VSCodeServer.ReplRunCodeRequestParams})()
    @ VSCodeServer c:\Users\PC\.vscode\extensions\julialang.language-julia-1.127.2\scripts\packages\VSCodeServer\src\eval.jl:263
 [23] #invokelatest#2
    @ .\essentials.jl:1055 [inlined]
 [24] invokelatest(::Any)
    @ Base .\essentials.jl:1052
 [25] (::VSCodeServer.var"#64#65")()
    @ VSCodeServer c:\Users\PC\.vscode\extensions\julialang.language-julia-1.127.2\scripts\packages\VSCodeServer\src\eval.jl:34

```

---

<div class="post-metadata">

**Author:** ![Nathan\_Boyer](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/nathan_boyer/32/14825_2.png) [@Nathan\_Boyer](https://discourse.julialang.org/u/Nathan_Boyer)\
**Post date:** [November 27, 2024, 3:35pm UTC](https://discourse.julialang.org/t/plotting-with-colorbar-and-nan/123165/2 "2024-11-27T15:35:44Z")

</div>

Your MWE works for me with no errors. I’m using Plots v1.40.9 with the GR backend on Windows.

---

<div class="post-metadata">

**Author:** ![nilshg](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/nilshg/32/2283_2.png) [@nilshg](https://discourse.julialang.org/u/nilshg)\
**Post date:** [November 27, 2024, 3:46pm UTC](https://discourse.julialang.org/t/plotting-with-colorbar-and-nan/123165/3 "2024-11-27T15:46:41Z")

</div>

Given that others can’t replicate it would probably be useful if you could share the output of `]st` and `versioninfo()`