以透明背景在 Octave 中保存绘图 [英] Saving a plot in Octave with a transparent background

问题描述

我使用 Octave 绘制了一些 GPS 轨迹和航向矢量.

I've plotted some GPS tracks and heading vectors using Octave.

我想将绘图叠加在卫星图像上，但是当我保存绘图时，它具有白色背景.有没有办法用透明背景保存?

I'd like to overlay the plot on a satellite image, but when I save the plot it has a white background. Is there a way to save it with a transparent background?

推荐答案

我认为将打印与pngalpha"设备一起使用可以满足您的需求，例如:

I think using print with the "pngalpha" device does what you want, e.g.:

print(gcf,'-dpngalpha', 'myplot.png');

不幸的是，这没有很好的记录.我广泛浏览了源代码以找到一种方法来破解/修补八度音程来做到这一点，结果发现这已经是可能的了.

This is poorly documented unfortunately. I browsed the source code extensively to find a way to hack/patch octave to do this, only to find out this was already possible.

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