ticks = {Matrix} scuttles plot drawing #550
Description
Under Julia 1.7.2, Plots v1.28.1, PyPlot v2.10.0, assigning a 1D {Matrix} to x/yticks prevents the plot from displaying. Jupyter fails silently while repl gives an error. This is frustrating because other parts of Julia encourage comma-less vector initialization. This can be worked around by xt = vec([1 3 7 10]).
using Plots
pyplot()
x = 1:1:10
y = 2 .*x
xt = [1, 3, 7, 10]
@show typeof(xt)
p1 = plot(x,y, xticks=(xt,xt), title="typeof(xt)=$(typeof(xt))")
xt = [1 3 7 10]
@show typeof(xt)
p2 = plot(x,y, xticks=(xt,xt), title="typeof(xt)=$(typeof(xt))")
plot(p1,p2)No type error or warnings are given in vsCode.Jupyter.
Executing in the julia repl gives:
julia> using Plots
julia> pyplot()
Plots.PyPlotBackend()
julia> x = 1:1:10
1:1:10
julia> y = 2 .*x
2:2:20
julia> xt = [1, 3, 7, 10]
4-element Vector{Int64}:
1
3
7
10
julia> @show typeof(xt)
typeof(xt) = Vector{Int64}
Vector{Int64} (alias for Array{Int64, 1})
julia> p1 = plot(x,y, xticks=(xt,xt), title="typeof(xt)=$(typeof(xt))")
julia> xt = [1 3 7 10]
1×4 Matrix{Int64}:
1 3 7 10
julia> @show typeof(xt)
typeof(xt) = Matrix{Int64}
Matrix{Int64} (alias for Array{Int64, 2})
julia> p2 = plot(x,y, xticks=(xt,xt), title="typeof(xt)=$(typeof(xt))")
Error showing value of type Plots.Plot{Plots.PyPlotBackend}:
ERROR: Invalid input for xticks: ([1 3 7 10], [1 3 7 10])
Stacktrace:
[1] error(s::String)
@ Base ./error.jl:33
[2] py_set_ticks(sp::Plots.Subplot{Plots.PyPlotBackend}, ax::PyCall.PyObject, ticks::Tuple{Matrix{Int64}, Matrix{Int64}}, letter::Symbol)
@ Plots ~/.julia/packages/Plots/PGQ1Y/src/backends/pyplot.jl:925
[3] _before_layout_calcs(plt::Plots.Plot{Plots.PyPlotBackend})
@ Plots ~/.julia/packages/Plots/PGQ1Y/src/backends/pyplot.jl:1321
[4] prepare_output(plt::Plots.Plot{Plots.PyPlotBackend})
@ Plots ~/.julia/packages/Plots/PGQ1Y/src/plot.jl:217
[5] display(#unused#::Plots.PlotsDisplay, plt::Plots.Plot{Plots.PyPlotBackend})
@ Plots ~/.julia/packages/Plots/PGQ1Y/src/output.jl:145
[6] display(x::Any)
@ Base.Multimedia ./multimedia.jl:328
[7] #invokelatest#2
@ ./essentials.jl:716 [inlined]
[8] invokelatest
@ ./essentials.jl:714 [inlined]
[9] print_response(errio::IO, response::Any, show_value::Bool, have_color::Bool, specialdisplay::Union{Nothing, AbstractDisplay})
@ REPL ~/clones/julia-1.7.2/share/julia/stdlib/v1.7/REPL/src/REPL.jl:293
[10] (::REPL.var"#45#46"{REPL.LineEditREPL, Pair{Any, Bool}, Bool, Bool})(io::Any)
@ REPL ~/clones/julia-1.7.2/share/julia/stdlib/v1.7/REPL/src/REPL.jl:277
[11] with_repl_linfo(f::Any, repl::REPL.LineEditREPL)
@ REPL ~/clones/julia-1.7.2/share/julia/stdlib/v1.7/REPL/src/REPL.jl:510
[12] print_response(repl::REPL.AbstractREPL, response::Any, show_value::Bool, have_color::Bool)
@ REPL ~/clones/julia-1.7.2/share/julia/stdlib/v1.7/REPL/src/REPL.jl:275
[13] (::REPL.var"#do_respond#66"{Bool, Bool, REPL.var"#77#87"{REPL.LineEditREPL, REPL.REPLHistoryProvider}, REPL.LineEditREPL, REPL.LineEdit.Prompt})(s::REPL.LineEdit.MIState, buf::Any, ok::Bool)
@ REPL ~/clones/julia-1.7.2/share/julia/stdlib/v1.7/REPL/src/REPL.jl:846
[14] (::REPL.var"#82#92"{Regex, Int64, Int64, Int64, REPL.LineEdit.Prompt, REPL.LineEdit.Prompt, REPL.LineEdit.Prompt})(::REPL.LineEdit.MIState, ::Any, ::Vararg{Any})
@ REPL ~/clones/julia-1.7.2/share/julia/stdlib/v1.7/REPL/src/REPL.jl:1174
[15] #invokelatest#2
@ ./essentials.jl:716 [inlined]
[16] invokelatest
@ ./essentials.jl:714 [inlined]
[17] (::REPL.LineEdit.var"#25#26"{REPL.var"#82#92"{Regex, Int64, Int64, Int64, REPL.LineEdit.Prompt, REPL.LineEdit.Prompt, REPL.LineEdit.Prompt}, String})(s::Any, p::Any)
@ REPL.LineEdit ~/clones/julia-1.7.2/share/julia/stdlib/v1.7/REPL/src/LineEdit.jl:1466
[18] prompt!(term::REPL.Terminals.TextTerminal, prompt::REPL.LineEdit.ModalInterface, s::REPL.LineEdit.MIState)
@ REPL.LineEdit ~/clones/julia-1.7.2/share/julia/stdlib/v1.7/REPL/src/LineEdit.jl:2586
[19] run_interface(terminal::REPL.Terminals.TextTerminal, m::REPL.LineEdit.ModalInterface, s::REPL.LineEdit.MIState)
@ REPL.LineEdit ~/clones/julia-1.7.2/share/julia/stdlib/v1.7/REPL/src/LineEdit.jl:2488
[20] run_frontend(repl::REPL.LineEditREPL, backend::REPL.REPLBackendRef)
@ REPL ~/clones/julia-1.7.2/share/julia/stdlib/v1.7/REPL/src/REPL.jl:1232
[21] (::REPL.var"#49#54"{REPL.LineEditREPL, REPL.REPLBackendRef})()
@ REPL ./task.jl:423It's good to have an error, but a type error would be more correct to throw. Why isn't this error passed through to Jupyter?
More generally, can types be added to the documentation display? There's more information in the doc url than in the page
https://docs.juliaplots.org/latest/api/#Plots.xticks!-Tuple{Union{Symbol,%20Tuple{AbstractVector{T},%20AbstractVector{S}},%20AbstractVector{T}}%20where%20{T%3C:Real,%20S%3C:AbstractString}}
#2337 may be relevant & blocking.
Many thanks, Ben