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Excluding elements of a matrix

From: Joseph Wakeling
Subject: Excluding elements of a matrix
Date: Tue, 19 Dec 2006 16:21:14 +0100
User-agent: Thunderbird (X11/20061115)

Is there a convenient notation for excluding elements of a vector or matrix?


I want to show a matrix, except for column 13.

or, I want to sum over all elements of a vector except elements [2 5 9].

Is there an easy way to do this?

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