Matlab help with if conditional

[astronut555]

Hello all,

I'm reading through some code that someone else wrote and have come across the following conditional:

if 0

figure; plot(times, average);

end;


I've never seen if used without a statement to test (ie: if x>0...) and I can't find any documentation on it anywhere.

Anyone seen this before and know what it does?

Thanks!

 

[marcusl]

Matlab's "if" command bases its decision on whether the next object is true or false, and this can be expressed also by 1 or 0. You are used to seeing an expression such as x>0, but this will evaluate to either true/1 (if the condition is true) or false/0 (otherwise). Your code might have had such a test at one time but it was replaced by 0 to force the plot command not to execute. Its possible the programmer added this plot during debug with a 1, then changed it to 0 when debug was over instead of removing the code. That way he/she can always reactivate the plot by changing one character.

 

[astronut555]

makes sense, thanks!