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Usage
Persistent variables are variables whose value persists
between calls to a function or script. The general syntax
for its use is
persistent variable1 variable2 ... variableN
The persistent statement must occur before the variable is
the tagged as persistent. Per the MATLAB API documentation
an empty variable is created when the persistent statement
is called.
Example
Here is an example of a function that counts how many times
it has been called.
count_calls.m
function count_calls
persistent ccount
if isempty(ccount); ccount = 0; end;
ccount = ccount + 1;
printf('Function has been called %d times\n',ccount);
We now call the function several times:
--> for i=1:10; count_calls; end
Function has been called 1 times
Function has been called 2 times
Function has been called 3 times
Function has been called 4 times
Function has been called 5 times
Function has been called 6 times
Function has been called 7 times
Function has been called 8 times
Function has been called 9 times
Function has been called 10 times
* FreeMat_Documentation
* Variables_and_Arrays
* Generated on Thu Jul 25 2013 17:18:30 for FreeMat by
doxygen_ 1.8.1.1
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