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

Learn moreOpportunities for recent engineering grads.

Apply TodayTo resolve issues starting MATLAB on Mac OS X 10.10 (Yosemite) visit: http://www.mathworks.com/matlabcentral/answers/159016

Asked by XJ on 27 Apr 2013

Hi,

I have written a program for a Crank-Nicolson scheme using MATLAB. I have solutions for u(x,t) at x=0:0.1:1.0, at t intervals of 0, 0.005, 0.001, 0.015 and 0.02.

We have the exact solution available, and are required to plot the difference between the exact and calculated values of u(x,t) with respect to x and t.

I am not sure how to do this, any help would be much appreciated.

*No products are associated with this question.*

Answer by the cyclist on 27 Apr 2013

My recommendation would be to go to the Plot Gallery: http://www.mathworks.com/discovery/gallery.html.

There you will find example of plots, along with the code that generates them. I expect you will be able to adapt one of them to your needs.

XJ on 28 Apr 2013

Hi, thanks for the answer.

The problem is, say I wanted to do a 3D bar plot, I currently have the u values, but I'm not sure how to specify the x and t values that they are at. For instance, I have a column matrix of 11 u values from x=0 to x=1 in intervals of 0.1, at time t=0, the same for time t=0.005, and so on, but I don't know how to plot this.

Many thanks.

## 0 Comments