Matplotlib savefig image trim

Question

The following sample code will produce a basic line plot with no axes and save it as an SVG file:

import matplotlib.pyplot as plt plt.axis('off') plt.plot([1,3,1,2,3]) plt.plot([3,1,1,2,1]) plt.savefig("out.svg", transparent = True) 

How do I set the resolution / dimensions of the image? There is padding on all sides of the image beyond the line graph. How do I remove the padding so that the lines appear on the edge of the image?

Answer 1

I am continually amazed at how many ways there are to do the same thing in matplotlib.
As such, I am sure that someone can make this code much more terse.
At any rate, this should clearly demonstrate how to go about solving your problem.

>>> import pylab >>> fig = pylab.figure()  >>> pylab.axis('off') (0.0, 1.0, 0.0, 1.0) >>> pylab.plot([1,3,1,2,3]) [<matplotlib.lines.Line2D object at 0x37d8cd0>] >>> pylab.plot([3,1,1,2,1]) [<matplotlib.lines.Line2D object at 0x37d8d10>]  >>> fig.get_size_inches()    # check default size (width, height) array([ 8.,  6.]) >>> fig.set_size_inches(4,3)  >>> fig.get_dpi()            # check default dpi (in inches) 80 >>> fig.set_dpi(40)  # using bbox_inches='tight' and pad_inches=0  # I managed to remove most of the padding;  # but a small amount still persists >>> fig.savefig('out.svg', transparent=True, bbox_inches='tight', pad_inches=0) 

Documentation for savefig().