How can I detect how many instances of Matlab are currently running on my machine?

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mathworks2011
mathworks2011 2011-4-22
评论： Sanket Mishra 2014-7-14
In task manager you can see how many matlab.exe there are.
is it possible to tell this from inside a matlab function?
eg I have a m function runing, doing stuff, and every so often I ask, "how many instances of matlab are running?" If the number is less than 2 say, then I am able to call a bat file from system.m to open a new instance and run a new job.
I dont have any fancy toolboxes eg parallel computing etc thanks

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Jason Ross
Jason Ross 2011-4-22
You can call the "tasklist" (DOS) function with some arguments that will tell you how many are running on the system. You can then parse the return and get a count.
e.g.:
>> [status,result] = system('tasklist /FI "imagename eq matlab.exe" /fo table /nh')
status =
0
result =
MATLAB.exe 5132 Console 1 359,184 K
MATLAB.exe 6028 Console 1 358,908 K
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