How to clear persistent variables?
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Daniel
il 5 Dic 2013
Commentato: Shubham Baisthakur
il 4 Mag 2021
I am currently using a persistent variable within a function that I would like to clear at the end of the execution of a larger program. I am currently using "clear functions". This is causing some headaches during debugging since this clears my breakpoints as well. Is there a way to clear only the persistent variables? Better yet, is there a way to clear specific persistent variables?
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Yair Altman
il 5 Dic 2013
Modificato: Yair Altman
il 5 Dic 2013
you can use
clear functionName
and all the persistent vars in that function will be cleared (set to [])
Più risposte (5)
will wehner
il 8 Gen 2014
%Example Function
function testCleanup
disp(' ')
k = 3;
myFun;
for i=1:2\n
myFun
end
function myFun
persistent x
if(isempty(x))
x=1;
disp('empty')
else
disp('not empty')
end
end
end %end testCleanup
The function myFun is called 3 times. Once, then 2 more times in a loop. When running this function for the first time it will display
empty
not empty
not empty
on each subsequent run of testCleanup, it displays
not empty
not empty
not empty
It is my desire to clear the persistent variable x at the end of the function testCleanup. Simply clearing the function does not work. Using the whos command outside the function scope does not work. Is there any way to use onCleanup to clear the persistent variable x?
1 Commento
Image Analyst
il 8 Gen 2014
Try this:
function testCleanup
clc;
k = 3;
myFun;
for i=1:2
myFun
end
clear functions;
function myFun
persistent x
if(isempty(x))
x=1;
disp('empty')
else
disp('not empty')
end
end
end %end testCleanup
morteza
il 23 Gen 2015
you can use each of these instructions: clear all or clear classes or clear functions
0 Commenti
Viktor Svensson
il 27 Giu 2016
Ran into this problem today, wanted to clear persistent variables and not the debug points. The best I could come up with was
debugStatus = dbstatus(fileName);
clear(fileName);
dbstop(debugStatus)
where dbstatus reads the debug points in the file and dbstop returns them after the clear.
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