separate functions or sub-functions

2013 6 10
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Dear all,
I have a main function and several sub-functions. Usually, I keep the function and the sub-functions in one .m file. alternatively, I also can save each sub-function as a separate .m file, and then invoke them in the main function.
my question is what the difference between this two way. for example, time consuming, memory needs etc...
thank you. George

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Matt J
Matt J 2013-6-10

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Subfunctions cannot be accessed (without a handle) from outside the mfile. So, if you need (convenient) access to them outside the mfile, it is best not to make it a subfunction.
Subfunctions also do get higher precedence on the search path, but I doubt you would ever see a consequential performance difference because of that.

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George
George 2013-6-12
thank you Matt.
Actually, I thought there may also have difference on memory consuming. But it seems there is no difference on this point.
Iain
Iain 2013-6-12
If you use NESTED functions, you might notice memory consumption differences.
function func1
function func2
do something
end
func2
end

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