如何使用MATLAB中坐标给出的值制作热图? [英] How to make a heat map with values given by coordinates in MATLAB?

问题描述

我有一个10018x3矩阵，其中每一行代表在特定(x, y)坐标处的测量值.也就是说，第一列包含所有x值，第二列包含所有y值，第三列包含所有测量值.

I have a 10018x3 matrix, where each row represents a measurement at a particular (x, y) coordinate. That is, the 1st column contains all the x values, the 2nd has all the y values, and the 3rd contains all the measurements.

该矩阵在此处可用.

我现在希望绘制出测量值的热图.我该怎么办?

I now wish to plot the heat map of the measurements. How should I do that?

尽管可能很愚蠢，但我还是尝试做scatter3(x, y, z)，这使我感到很困惑.

My attempt, although maybe stupid, is to do scatter3(x, y, z), which renders me this

尽管我可以看到趋势，但我希望的是这一趋势.

Although I can see the trend, yet what I am wishing for is this.

推荐答案

您还可以使用TriScatteredInterp进行插值并创建等高线图:

You can also interpolate using TriScatteredInterp and create a contour plot:

x=linspace(min(data(:,1)),max(data(:,1)),150);
y=linspace(min(data(:,2)),max(data(:,2)),150);
[X,Y]=meshgrid(x,y);
F=TriScatteredInterp(data(:,1),data(:,2),data(:,3)-1);
contourf(X,Y,F(X,Y),100,'LineColor','none')

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