mattpitkin

Adding python functionality to a SWIG-wrapped structure

This is a little example of adding some python-object-like functionality to a C structure that is SWIG-wrapped for use in python. What I've done mainly comes from this StackOverflow question, and the very useful answer, but is written here to remind me.

Say you have some C code containing a structure like this:

/* testswig.h file */
#include <stdlib.h>
#include <stdio.h>

mattpitkin

import numpy as np

from matplotlib import pyplot as plt
from matplotlib.patches import Rectangle


fig, ax = plt.subplots()

def draw_2x2_grid(ax, xy, bwidth=0.25, bheight=0.25, numbers=[]):
    for i in range(2):

mattpitkin

In answer to this StackOverflow question, here is a method (based heavily on this answer) to create a violin plot with a gradient colour fill based on the density of the samples (i.e., width of the violin):

from matplotlib import pyplot as plt
from matplotlib.path import Path
from matplotlib.patches import PathPatch
import matplotlib as mpl