2D plot with 3rd variable

7 次查看（过去 30 天）

Michel tawil 2019-7-12

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/471514-2d-plot-with-3rd-variable

评论： Michel tawil 2019-9-14

hey, i have many lines in X and Y axes, need to color each line according to a variable Z, how to do that ?

already plotted all the lines needed but need to add the color for each line according to the value of Z. for example if Z= 0 the line will take a color and if it;s 0.8 it takes another color( i mean how to add a colorbar for this )

thanks

4 个评论
显示 2更早的评论隐藏 2更早的评论

John Doe 2019-7-12

在 MATLAB Online 中打开

You can modify the following code for your purposes.

where n will = the size of averageV

y(1:241,1) = 1:241 
n = size(y, 1); 
colors = hsv(n);
h =   line([0 10], [y(1:241,1) y(1:241,1)])
set(h, {'color'}, num2cell(colors, 2));

https://uk.mathworks.com/matlabcentral/answers/19815-explicitly-specifying-line-colors-when-plotting-a-matrix

Michel tawil 2019-7-13

Hey, if it's only taking the size, how will it plot according to the value of averageV,

i want the line color plotted in XY according to the value of averageV not according to the size of averageV.

sorry for bothering again

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Cristian Garcia Milan 2019-7-12

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/471514-2d-plot-with-3rd-variable#answer_383029

Hello Michel,

I think you can use RGB colors so if you have the data in rows in X and Y it would be somethink like:

figure hold on for i = 1:size(X,1) plot(X(i,:),Y(i,:),'color',[Z(i) 0 1]) % There is needed that Z has a value from 0 to 1 for each row end

Hope it helps!

4 个评论
显示 2更早的评论隐藏 2更早的评论

Michel tawil 2019-7-17

thank you, i guess this is exactly what i want. i'll make sure of it

Michel tawil 2019-9-14

hello again, the plot3 didn't work.

My point is that for each line i am plotting, i want it to be colored according to a third variable ( that is the velocity of that line), the index of the lines and variables is not a problem, i just need a function in matlab that takes the color from a matrix different than the one used to plot(3rd variable)

nothing worked till now. i have 235 lines and each one of them has a velocity

请先登录，再进行评论。