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Topic: Clear function local variable?
Replies: 3   Last Post: Jun 19, 2013 11:15 AM

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Luca Balbi

Posts: 12
Registered: 4/17/09
Clear function local variable?
Posted: Jun 19, 2013 2:49 AM
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sorry if this was answered before but I can't seem to find a known answer.
Several times I have seen that inside a function a local variable is cleared, like this:
(I know it's a silly example, it's just an example... :D )
function [] = foo(a)
% ...
x = a.^2; % x is local to foo, not global
y = 2 * x;
clear x;
% ...
end %function

Unless x is veeeeeeery big in memory, this seems pointless to me: x gets out of scope and is cleared at the function end.
The question is: is clearing local variables as soon as they are no longer useful a good practice?

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