Matlab memory function for Mac OS X

gistfile1.matlab

if ismac                                                                  % if computer is a mac.
  [~,txt] = system('sysctl -a | grep hw.memsize | awk ''{print $2}''');   % get physical system memory
  memory_avail_in_gb = (eval(txt)/1024^3);                                % convert from byte to Gb.
  fprintf(['Available memory: ' num2str(memory_avail_in_gb) ' Gb'])       % display amount of memory available
  
else                                                                      % on pc's
  memory                                                                  % use builtin memory function
  
end