matlab “memory” function on mac?

Question

On Windows machines, MATLAB users can use either the memory or the feature memstats commands. However, neither of these work on a machine, failing as follows:

>>          


        

Answer 1

memory is only available on Windows systems.

You can try using top built-in Mac command instead.

Answer 2

I know this question is old and already answered, but for anyone else looking for this answer, an alternative that works on all platforms it to use whos:

allvars = whos;
memused = sum([allvars.bytes]);

This assumes you only have one workspace being used by your script/function. If you have a script that uses multiple workspaces, you'll need to specify all the different workspaces and add them together.

Answer 3

I have not been able to find a command that reproduces the functionality of memory. However, if you know how much total memory your system has, you can use who (or vsize from the file exchange for more detail) to estimate how much memory your variables are currently using and thus how much free space you have.

By the way, you can always find out about Java memory by calling

java.lang.Runtime.getRuntime.maxMemory
java.lang.Runtime.getRuntime.totalMemory
java.lang.Runtime.getRuntime.freeMemory

Note that Matlab memory and Java memory are different - Java memory is used for UI, including figures, as well as other java objects, while memory reports the memory available for variables and calculations.