matlab save figure，没有坐标轴，保存为png 背景透明

matlab save figure，没有坐标轴，保存为png 背景透明

这个是最相关的解决方案：

https://ovcharenkoo.com/transparent-background/

Ghostcript program not found please locate it

https://www.reddit.com/r/matlab/comments/rxb6yf/ghostscipt_installation_not_found_error_even/

plot(cos(linspace(0, 7, 1000)));
set(gcf, 'Position', [100 100 150 150]);
set(gca,'xtick',[],'xticklabel',[]);
set(gca,'ytick',[],'yticklabel',[]);
set(gca, 'Color', 'none'); % Sets axes background
axis off;
export_fig test.png -transparent

效果如下：终于得到了透明的图像

plot(cos(linspace(0, 7, 1000)));
set(gcf, 'Position', [100 100 150 150]);
set(gca,'xtick',[],'xticklabel',[]);
set(gca,'ytick',[],'yticklabel',[]);
set(gca, 'Color', 'none'); % Sets axes background
axis off;
export_fig test.png -transparent -r300;  % 调整图像的清晰度

这个是可以的

plot(dff(14,:));
set(gcf, 'Position', [100 100 150 150]);
set(gca,'xtick',[],'xticklabel',[]);
set(gca,'ytick',[],'yticklabel',[]);
set(gca, 'Color', 'none'); % Sets axes background
axis off;
export_fig('test2.png', '-transparent','-r300');
% export_fig test.png -transparent -r300;

一定要注意，要把

axis off;

加上去，这样就可以把四个边界也给消除掉！