What are some tips for debugging MATLAB plots?

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SUMMARY

The discussion centers on debugging MATLAB plots, specifically addressing the "Warning: Matrix is singular to working precision" and "NaN" errors encountered while plotting solutions to differential equations. The user, M. Saravanan, emphasizes the importance of parameter tuning to resolve these issues. Recommendations include utilizing MATLAB's debugging features, such as setting breakpoints and stepping through M-files, to identify and rectify the source of the errors.

PREREQUISITES
  • Familiarity with MATLAB programming and M-files
  • Understanding of differential equations and their graphical representations
  • Knowledge of debugging techniques in MATLAB
  • Basic concepts of numerical stability and matrix operations
NEXT STEPS
  • Explore MATLAB's debugging features, including breakpoints and the MATLAB debugger
  • Learn about handling NaN values in MATLAB and strategies to avoid them
  • Research techniques for improving numerical stability in MATLAB computations
  • Investigate parameter tuning methods for differential equation solutions in MATLAB
USEFUL FOR

This discussion is beneficial for MATLAB users, particularly those working with differential equations, as well as programmers and data analysts seeking to enhance their debugging skills in MATLAB.

saravanan13
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Dear friends
I M. Saravanan, currently working in MATLAB attempting to plot some solutions of the differential equations.
When plotting I received a command "Warning: Matrix is singular to working precision" for the solution step in the M files. Since as a beginner this statement make me to proceed further.
The solution involves a lot of parameter so that by tuning the parameter I could get the plot.

Also another command which I received is "Nan".

I could be benefit enough if someone could be help me in this regard.
 
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The warning tells you that you probably divided by zero somewhere (or did another similar operation). The NaN (not a number, and not the delicious naan bread) you see in your results is confirmation of this. I'd suggest using the debugging features to set some breakpoints, or step through your m-file and debug your code:
http://www.mathworks.com/help/techdoc/matlab_env/brqxeeu-175.html
http://en.wikibooks.org/wiki/MATLAB_Programming/Debugging_M_Files
 
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