用颜色z在坐标(x，y)上绘制(x，y，z)三元组 [英] Plot (x,y,z) triplets over coordinates (x,y) with color z

问题描述

我有一个点(x，y，z)的列表，并想将它们可视化为点上(x，y)且点的颜色/强度/厚度为z的平面上的曲线.如何在Matlab中完成?

I've got a list of points (x,y,z) and would like to visualize them as a curve on a plane with points on (x,y) and any of color/intensity/thickness as z. How can this be done in Matlab?

plot(x,y)的形状正确，但是我需要颜色取决于z.

plot(x,y) gets the right shape, but I need the color to depend on z.

推荐答案

假定您不在乎实际线条的颜色，而是在乎标记. plot与scatter结合使用.

Assuming you don't care about the color of the actual line, but the markers. Use plot in combination with scatter.

想象以下示例数据:

t = 0:pi/20:2*pi;
x = sin(t);
y = cos(t);
z = t;

plot3(x,y,z);

绘制在2D平面中:

plot(x,y); hold on
scatter(x,y,300,z); hold off

导致:

根据您的评论:如果您有足够的数据并且不需要该行，只需使用scatter，这正是您所需要的.

From your comment: if you have enough data and you don't need the line, just use scatter, it's exactly what you need.

另一种可能性是受解决方案.

surface([x;x],[y;y],zeros(2,length(t)),[z;z],'EdgeColor','flat',...
        'Marker','o','MarkerSize',10,'MarkerFaceColor','flat');

使颜色依赖于z非常容易，要更改标记大小，您肯定需要scatter函数:

Make the color dependent on z is quite easy, for changing marker sizes you definitely need the scatter function:

surface([x;x],[y;y],zeros(2,length(t)),[z;z],'EdgeColor','flat'); hold on
MarkerSize = round(z*1000)+1;
scatter(x,y,MarkerSize,z,'.','MarkerFaceColor','auto'); hold off

对于z取决于，增加透明度有点棘手.您可以使用 此处 找到解决方法patch功能.

For on z depending, increasing transparency it's a little tricky. You can find a workaround here, using the patch function.

这篇关于用颜色z在坐标(x，y)上绘制(x，y，z)三元组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！