% you created a figure and it is “current”. % the following, you could have guessed
set(gcf,‘color’,‘none’);
set(gca,‘color’,‘none’);
% but this following little detail took me ages to figure out
set(gcf,‘InvertHardCopy’,‘off’);

作者：neweroica
来源：CSDN
原文：https://blog.csdn.net/neweroica/article/details/1672988
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