How to change the linewidth of hatch in matplotlib?

Question

Is there a way to increase the width of hatch in matplotlib?

For example, the following code by specifying linewidth only changes the width of the edge. I

Answer 1

There is a solution which is very hacky, but allows you to do what you want without changing matplotlib internal files: you can monkey patch the writeHatches of PdfFile like so:

# make sure you have the correct imports,
# they may differ depending on the matplotlib version
import matplotlib.backends.backend_pdf
from matplotlib.externals import six
from matplotlib.backends.backend_pdf import Name, Op
from matplotlib.transforms import Affine2D

def setCustomHatchWidth(customWidth):

     def _writeHatches(self):
        COPY CODE FROM matplotlib.__path__[0] + "/backends/backend_pdf.py" HERE
        change the line 
            self.output(0.1, Op.setlinewidth)
        to 
            self.output(customWidth, Op.setlinewidth)

    matplotlib.backends.backend_pdf.PdfFile.writeHatches = _writeHatches

You can then do

setCustomWidth(2)

before saving you figure as pdf.