Programming and Data Types

An Example Using profile

This example demonstrates how to run profile:

1. To start profile, type in the Command Window

• profile on -detail builtin -history
  

1. The -detail builtin option instructs profile to gather statistics for built-in functions, in addition to the default M-functions, M-subfunctions, and MEX-functions.

   The -history option instructs profile to track the exact sequence of entry and exit calls.

2. Execute an M-file. This example runs the Lotka-Volterra predator-prey population model. For more information about this model, type lotkademo, which runs a demonstration.

• [t,y] = ode23('lotka',[0 2],[20;20]);
  

3. Generate the profile report and save the results to the file lotkaprof.

• profile report lotkaprof
  

1. This suspends profile, displays the profile report in your system's default Web browser, and saves the results. See Viewing profile Results for more information.

4. Restart profile, without clearing the existing statistics.

• profile resume
  

1. The profile function is now ready to continue gathering statistics for any more M-files you run. It will add these new statistics to those generated in the previous steps.

5. Stop profile when you finish gathering statistics.

• profile off
  

The profile Function

Viewing profile Results