[FIXED] Python matplotlib produces empty subplot when trying to make 4 subplots

Issue

plt.rcParams["figure.figsize"] = (40, 40)

fig, axs = plt.subplots(2, 2)

plt.locator_params(axis='x', nbins=6)

axs[0, 0].plot(xcoords, ycoords)
axs[0, 1].scatter(xcoords,ycoords,s=1)

axs[1, 0].bar(xcoords, ycoords)
axs[1, 1].bar(ycoords, xcoords)

plt.show()  

First 3 graphs get created as expected, but the fourth one is just blank Screenshot

Any help appriciated

Solution

The default width of a bar for matplotlib.pyplot.bar() is 0.8. That is usually fine, but if your x-axis runs from 0 to 110.000 or so, that is tiny. So tiny, that Matplotlib will not draw the bars, or more likely, they will not be rendered (and even if they were rendered, you wouldn't be able to see them).

So the data is there, just "invisible".

Increase the bar width. For example:

axs[1, 1].bar(ycoords, xcoords, width=100)

Answered By - 9769953