Discover MakerZone

MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi

Learn more

Discover what MATLAB® can do for your career.

Opportunities for recent engineering grads.

Apply Today

New to MATLAB?

How can I create an x,y plot where the grid spacing is not equal?

Asked by Rob

Rob

on 16 Jan 2013

I have a 5x50 matrix of temperature measurements taken across a metal plate which I would like to plot. The spacing of the x-axis measurements was 1.1cm and the y-axis was 0.6cm. Somehow I need to plot the measurements according to this spacing and interpolate the temperatures between the measurements. Here's what I have so far:

    % Temperature data is stored in T
    [X,Y]=meshgrid(0:1.1:4.9,-15:0.6:14.4);
    contourf(X,Y,T)
    title('Temperature Distribution')

I am not convinced this is producing the correct result also, I am not able to interpolate the shading when using contourf, if there a better plot to use?

2 Comments

Doug Hull

Doug Hull

on 16 Jan 2013

What makes you think this is incorrect?

What is the purpose of the visualization?

Rob

Rob

on 16 Jan 2013

I thought it was incorrect because of the shape of the contours it produced, that may just be the nature of the temperatures recorded but I wanted to rule out it was a problem with my code first.

The visualization is simply there to give the reader an overview of how well the plate is conducting heat so I need to produce the same plot for different values of time.

Rob

Rob

Products

No products are associated with this question.

1 Answer

Answer by Irl

Irl

on 16 Jan 2013

You might prefer to interpolate the data first, before plotting. Look at the help for interp2, perhaps with method set to bicubic.

1 Comment

Rob

Rob

on 16 Jan 2013

Thanks, I'll take a look. Is this better than using 'shading interp'?

Irl

Irl

Contact us