How do I comment out a large block of code in MATLAB?

I want to do this in an easy way.

Answer 1

Starting in MATLAB 7 (R14), the syntax is:

%{
   Stuff to be commented out
%}

You can also highlight a section of code and type control-r to comment out the code -- this will place a percent symbol (%) at the beginning of the line. Typing control-t will uncomment the lines by removing any percent symbol that is the first non-blank character on the line.

If you have an older version, the built-in editor in MATLAB 6.0 has a block-comment feature, which will simply put a comment character on each line. Or you can use matlab-mode for Emacs, which supports this as well.

If you are using an even older version, use this:

if 0
  commented out code 
end

This is not the best solution, since parse errors inside that block will cause an error.

[From the MATLAB FAQ of Ancient Times]

Also, the control-r and control-t work for C source code as well ... putting and removing the // style comments.