Matplotlib恼人的正方形在右上角

Question

May be this is a silly question. I am exporting an eps plot from matplotlib (installed through Anaconda in Ubuntu 18.04 LTS). When opening the .eps file an annoying square appears at the right top corner, this seems to be something from the fig viewer. I still could not manage to find a solution.

EDIT: I am adding the code, after the accepted answer.

plt.figure(num=2, figsize=(5,3))
p1, = plt.plot(ffaa[0], ffaa[1], 'k-', linewidth=0.5) 
plt.xlabel('Time (s)',   fontsize=8)
plt.ylabel('Voltage (V)',fontsize=8)
plt.legend(handles=[p1]) 
plt.xlim([0,100])
plt.show()
mu.figexp('Figure 03 - Frequency spectrum', plt)

Answer 1

The "annoying square" is a legend . So at some place in your code you create a legend for your graph, presumably via plt.legend() or ax.legend() . However your plot does not have any label associated with it. Hence the legend stays empty.

Solutions:

• Remove the line that created the legend from your code.
• Add a label to your plot, eg via plt.plot(...., label="my label") , which would then be shown inside the box.