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pythonmatplotlibsvg

Edges in .svg figure do not meet when zoomed in after matplotlib savefig

I am trying to generate an svg file with Python and matplotlib. A simpler version of the code that I use is the following :

import matplotlib.pyplot as plt


plt.figure()
plt.fill([0,1,0.5],[0,0,1],color = "r")
plt.fill([1.5,1,0.5],[1,0,1],color = "b")
plt.show()
plt.savefig("soedgesvg.svg")

So far so good the result is as expected : enter image description here

But when I open it in Inkscape I get an unexpected ghost edge with no color specified. This can be seen in the following picture :

enter image description here

Is there a way to remove this edge in Python before exporting the svg ?

Edit

This occurs only when a color is specified from my experience.

Inkscape 0.92.3 and matplotlib 3.1.1

Solution

  • The way to go is to add linewidth=0 when calling plt.fill like so :

    plt.fill([0,1,0.5],[0,0,1],color = "r", linewidth=0)
plt.fill([1.5,1,0.5],[1,0,1],color = "b", linewidth=0)

    This answer has been provided by @ImportanceOfBeingErnest in the comments with the following explanation :

    Because the linewidth is defined in points. When you zoom inside matplotlib, the lines always keep their physical size, e.g. 1/72. of an inch. When you zoom in in Inkscape you zoom into the actual figure, up to the point where maybe your screen only shows 1/72. of an inch and hence the line will be as large as the screen.