如何在gnuplot中的2D热图上标记一些点? [英] How to mark some points on 2D heat map in gnuplot?

问题描述

我正在使用简单的方案从我的数据中绘制2D热图:

I am using simple scheme for plot 2D heat map from my data like this:

set pm3d map
set pm3d interpolation 5,5
splot "file"

现在，我需要在此数据上标记一些点，也许用白色标记.我尝试这样做:

Now i need to mark few points on this data, maybe with white color. I tried to do:

splot "file"; plot "points"

它不起作用并写道:不能将pm3d用于2d图".

and it's not working and writes: "Can't use pm3d for 2d plots".

推荐答案

文件是什么样的?您可以这样做:

What does the file look like? You can do:

splot 'file' with pm3d, 'points' with points linecolor rgb "white"

根据'points'的外观，您可能需要添加一个使用规范:

depending on what 'points' looks like though, you might need to add a using specification:

splot 'file' with pm3d, 'points' using 1:2:(0.0) with points linecolor rgb "white"

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