workspace bytes to MB
Oleg Komarov
I'd like to display the memory used by the variables in the workspace pane in MB instead of bytes.
Do you know of any way to accomplish this? Maybe Yair has some tricks up in his sleeve...
Thanks and happy new year!
Oleg
Matt J
> Hi to everyone,
> I'd like to display the memory used by the variables in the workspace pane in MB instead of bytes.
I'd like to know even just how to display them in bytes. My Workspace pane only displays Name, Value, Min, & Max
Anyway, it may not be quite what you're after but the function below does something similar
Example:
X=rand(3000);
>> meg X
ans =
68.6646
function mem=meg(varargin)
%
%Issuing the command MEG returns the number of megabytes of used memory
%as tracked by WHOS().
%
%MEG X Y will display the memory in MB consumed (according to whos) by variables X %and Y
if nargin==0
cmdstr=['whos;'];
s=evalin('caller', cmdstr) ;
else
in=['''' varargin{1} ''''];
numargs=length(varargin);
if numargs>1
for ii=2:numargs
in= [in ',' '''' varargin{ii} ''''];
end
end
cmdstr=['whos(' in ');'];
s=evalin('caller', cmdstr) ;
end
if length(s)<1, mem=0; return; end
c=cell(1,length(s));
[c{:}]=deal(s.bytes);
c=vertcat(c{:});
mem=sum(c)/2^20;
us
> function mem=meg(varargin)
> %
> %Issuing the command MEG returns the number of megabytes of used memory
> %as tracked by WHOS().
> %
> %MEG X Y will display the memory in MB consumed (according to whos) by variables X %and Y
another, slightly more versatile approach...
- note the enhanced possibility to input a var
%SYNTAX
%---------------------------------
% MEB x y* 'zz';
% MEB('x',zzz,'y*');
%
function r=meb(varargin)
mb=2^20;
in='';
if nargin
arg=varargin;
ix=~cellfun(@ischar,arg);
in=arrayfun(@inputname,find(ix),'uni',false);
arg(ix)=in;
arg=unique(arg);
in=sprintf('''%s'',',arg{:});
in(end)='';
end
% get/convert var name/size
com=['whos(',in,');'];
s=evalin('base',com);
sn={s.name}.';
sb=cat(1,s.bytes)./mb;
r=[sn,num2cell(sb)].';
% beautify output
tl=1+max(cellfun('length',sn));
bl=1+max(ceil(log10(sb)));
fm=sprintf('%%-%ds %%%d.2f MB\n',tl,bl);
r=sprintf(fm,r{:});
disp(r);
if ~nargout
clear r;
end
end
but: this is probably NOT what the OP is looking for...
us
Matt J
> "Matt J "
> > function mem=meg(varargin)
> > %
> > %Issuing the command MEG returns the number of megabytes of used memory
> > %as tracked by WHOS().
> > %
> > %MEG X Y will display the memory in MB consumed (according to whos) by variables X %and Y
>
> another, slightly more versatile approach...
> - note the enhanced possibility to input a var
Sorry, I'm not seeing the increased versatility you mention, only a difference in the format of the output. (My version also took vars as input.)
us
an example
x=rand(1000);
y=x;
yy=x(1:500,1:500);
% MEB
meb('x','y*'); % <- works as expected...
meb(x,yy,'y'); % <- works as well...
% MEG
meg('x','y*') % <- works as expected...
meg(x,yy,'y') % <- does NOT work...
just a thought
us
Matt J
> % MEB
> meb('x','y*'); % <- works as expected...
> meb(x,yy,'y'); % <- works as well...
> % MEG
> meg('x','y*') % <- works as expected...
> meg(x,yy,'y') % <- does NOT work...
>
Ah. Okay.
Anyway, sorry we're not being of more help to you, Oleg (except perhaps by continually bumping this thread) :-)
Oleg Komarov
> us
Since this detail (at least from the R2008a ver) is expressed in bytes it loses meaning when the variables grow big.
Oleg
Oleg Komarov
I've submitted and enhacement request and in the meantime i'll implement the suggested solutions.
Oleg
Oleg Komarov
% WSSIZE Display size of variables in the base workspace using B, KB, MB and GB
function wssize
% Obtain base workspace contents
ws_contents = evalin('base', 'whos');
% Loop through contents and display size on screen
for i = 1:length(ws_contents)
cur_size = ws_contents(i).bytes;
if cur_size > 1024^3;
fprintf('%-15s: %8.3f GB\n', ws_contents(i).name, cur_size/1024^3);
elseif cur_size > 1024^2;
fprintf('%-15s: %8.3f MB\n', ws_contents(i).name, cur_size/1024^2);
elseif cur_size > 1024;
fprintf('%-15s: %8.3f KB\n', ws_contents(i).name, cur_size/1024);
else
fprintf('%-15s: %8.3f B\n', ws_contents(i).name, cur_size);
end
end
end
Oleg
us
wow! what a smart solution - yet, still NOT what you were asking for...
us
Oleg Komarov
>
> us
Anyway this solution (and the one you proposed) is much faster than googling '76537543 bytes to MB' :)
Oleg
Yair Altman
I couldn't resist the challenge...
http://UndocumentedMatlab.com/blog/customizing-matlabs-workspace-table/
Enjoy :-)
Yair Altman
http://UndocumentedMatlab.com