Plots.jl: Negative radius with polar coordinates

[kleinschmidt]

Negative radii are silently dropped, but the corresponding angle entries are not:

julia> plot(rand(200), rand(200) .- 0.5, proj=:polar)
Error showing value of type Plots.Plot{Plots.GRBackend}:
ERROR: BoundsError: attempt to access 105-element Array{Float64,1} at index [1:200]

this is with:

  [28b8d3ca] GR v0.39.1
  [91a5bcdd] Plots v0.24.0

Previously negative radii were handled just fine (e.g., the points were plotted as if the angle was 180° and the radius was positive). The change happened at some time in the last year I think (this worked fine when I wrote the code ~1 year ago).

[asinghvi17]

Same issue with PlotlyJS and PGFplots backends. Seems like this is in Plots, not backend dependent.

[daschw]

I'm not sure if it would be better to drop also the corresponding angles or to restore the old behaviour @kleinschmidt describes. Any opinions?

[MasonProtter]

I'd vastly prefer the old behaviour.

[daschw]

Should be restored in #2010

[kleinschmidt]

Fantastic, thanks for the quick attention.

[daschw]

Thanks for reporting!

[mkborregaard]

So awesome @daschw