problem with matlab when executing the same program twice?
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i seem to be facing this weird problem when i try to run the same program in matlab, in succession. the first time i do it it gives me the answer within 30 seconds, and then when i try to run it again it just goes on and on. how is this possible? i have even used clear at the very top.
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Jason Ross
2011-5-4
0 个投票
Are you exhausting some resource the first time through that prevents the second run from using them? Examples might include but are not limited to memory, disk space, network connections, file handles, serial connections or communications ports.
Without more specifics (profiler output, what you are doing, example code, OS, version) it's very difficult to say where the problem may lie.
Also, does it go away when you restart MATLAB? When you restart the machine?
5 个评论
Sarla
2011-5-5
Sean de Wolski
2011-5-5
I assume you mean very large arrays, not numbers?
It very well could be, especially if you're on a 32 bit system. I crash my system quite often working with large matrices.
Jason Ross
2011-5-5
You can examine your memory utilization using the techniques in
http://www.mathworks.com/support/tech-notes/1100/1106.html
Hopefully this will help.
Sarla
2011-5-6
Johnathan Faria
2021-1-18
Hi guys, I'm with the same issue, I'm working with a Kalman Filter code and i just can run the code once, I've tried the things above, but didnt worked!
更多回答（2 个）
Jan
2011-5-4
1 个投票
Use the command "profile" to see, where the time is lost in the 2nd run.
Robert Cumming
2011-5-5
0 个投票
are you using a mex function or a dll? If so it could be that one of those has a memory leak? Meaning that clear all is nto actually clearing everything...
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