Matplotlib.savefig忽略轴并在图像周围绘制黑色边框

Question

I have a matplotlib Figure embedded in a QtAggFigureCanvas (PyQt4) with titles and axis labels (example shown below).

I implemented a button to save the figure to a png file. The figure was created with:

self.plkDpi = 100
self.plkFigure = Figure(dpi=self.plkDpi)
...
self.plkAxes = self.plkFig.add_subplot(111)
...
self.plkAxes.set_xlabel(...)
self.plkAxes.set_ylabel(...)
self.plkAxes.set_title(...)

When I hit my save button, the following code is executed:

self.plkFig.savefig('tmp.png', bbox_inches='tight', dpi=self.plkDpi)

For some reason, the axes and plot title are omitted from the final plot. But they are not cropped - there is a bounding black box around the figure that is just blank (see below)

No matter what I try, changing figsize, dpi, bounding box, etc. I cannot get the figure to save with the axis labels.

Answer 1

Please, take a look at this link: Black background behind a figure's labels and ticks, only after saving figure but not in Python Interactive view (VS Code with Jupyter functionality)? .

It seems plt.savefig() overwrites plot parameters. So you must define them again. Try this: plt.savefig('yourfilenamehere.png', facecolor='w'). This will set the borders in white.

Best regards,