How can I plot a 2D contour from data vectors?

Hi,

I have 3 column vectors PosX, PosY and T; all of size 1367 1

I want to plot 2d contour where:

X axis be defined by PosX

Y axis be defined by PosY

and Z axis be a colormap of T

An exmaple of my data:

PosX(5,1)=24.5;

PosY(5,1)=-0.5;

T(5,1)=1220;

These 3 values must represent a point of my plot.

Thanks for your help.

Answer 1

[Image Analyst]

I think you mean T is the value for the (x,y) coordinate, not a colormap. But you want a colormap to be applied to the T values.

Do you just want to plot the data, like with plot3(),

plot3(X(:), Y(:), T(:));

or do you want level contours that might go in between any data that you have?

[Schneider Eusse]

Correct, T is the value for the (x,y) coordinate, but T is not a function, i have these data as vectors (was calculated by element finite method). I want a colormap to be applied to the T values.

I got an answer using plot3(), but it is not what I need. I need only a 2d view and a colormap to the T values. how i do it?

Thanks a lot. P.D.: Excuse my bad english.

[Image Analyst]

Maybe you should turn it into a full 2D array and then use contour(). You can use TriScatteredInterp or scatteredInterpolant to do this. This will give you a value for T for every possible pair of x and y - essentially a solid 2D array (like an image).