Plots and Shape?

General Usage
1

I found the following code in this discourse (there seems to be a couple of versions of it):

import Plots as plt
ang = range(0, 2π, length = 60)
ellipse(x, y, w, h) = plt.Shape(w*sin.(ang).+x, h*cos.(ang).+y)    # Returns a Shape object
myshapes = [ellipse(x,rand(),rand(),rand()) for x = 1:4]
plt.plot(myshapes)

and I think this worked a few weeks ago. But now it does not work…

The result is the same as the following code (which still works):

ang = range(0, 2π, length = 60)
ellipse(x, y, w, h) = w*sin.(ang).+x, h*cos.(ang).+y    # Returns a tuple
myshapes = [ellipse(x,rand(),rand(),rand()) for x = 1:4]
plt.plot(myshapes,st=:shape)

and produces:

image
image1526×1022 66.9 KB

Question: Has there been a breaking change in Plots so that Shape doesn’t work any more? [Or do I do something wrong?]

2

There were a few changes regarding shapes lately,
such as
https://github.com/JuliaPlots/Plots.jl/pull/3436

does it work on 1.13.2?

1 Like
3

I don’t understand what’s going on… Let myshapes be defined as [just so we know which myshapes version I’m talking about]:

ang = range(0, 2π, length = 60)
ellipse(x, y, w, h) = plt.Shape(w*sin.(ang).+x, h*cos.(ang).+y)    # Returns a Shape object
myshapes = [ellipse(x,rand(),rand(),rand()) for x = 1:4]
  1. I use Plots v1.15.1.
  2. If I do plt.plot(myshapes), I get an error message. Note: myshapes is a vector of Shapes.
  3. If I instead do the following, then things work:
plt.plot()
for s in myshapes
    plt.plot!(s)
end
plt.plot!()

To me, this appears to be a bug in how the recipe “unpacks” the vector of Shapes???

Or is the recipe changed so that it cannot plot vectors of shapes?

4

I can confirm that this works on Plots 1.0.0, but not on 1.13.2. Can you open an issue on github? This is a good test example

1 Like
5

Done.

1 Like
6

This should be fixed on 1.15.2

1 Like
7

Seems to work!

Thanks a lot!!