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sort and find in MATHEMATICA like in MATLAB

• To: mathgroup@smc.vnet.net
• Subject: [mg11021] sort and find in MATHEMATICA like in MATLAB
• From: Alexej Jerschow <Alexej.Jerschow@ico.unil.ch>
• Date: Mon, 16 Feb 1998 18:15:25 -0500

in MATLAB I would write:

[dummy,index]=sort(a(:,i));
sorta=a(index,:);

to sort the matrix a by it's i-th column.

What's the easiest way to do the same in MATHEMATICA ?


Another thing, again MATLAB:

index=find(a(:,i) == 0);
sorta=a(index,:);

to remove lines, which have zeros in the i-th column.

Thank you

A. Jerschow