I have constructed a simulink model, where within the model I have a MATLAB function block as you can see. Within that block, a very simple code loads data from a .mat file and interpolates using interp1.
However I get the following error when I run the model which I have managed to trace to the line in the MATLAB function block where the interpolation occurs:
An error occurred while running the simulation and the simulation was terminated
- The data abscissae must be distinct and strictly monotonic.
Component:Simulink | Category:Block error
This is simple enough, as one would assume that my x vector in the interp1 function includes non-monotonic data. But the problem is that it doesn't! I have tested that by running the code in the MATLAB function block by itself as a normal matlab file, and also used unique to tripple check and it works perfectly. I also checked where the current folder to ensure that the file is taken from the right place. So I really do not know why the interp1 function presents this problem when I am running it in Simulink. It must be something that I don't understand.
P.S. Attached you can find the files that I am using. Just download and run if you need to.