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Re: Excluding elements of a matrix
From: |
Joseph Wakeling |
Subject: |
Re: Excluding elements of a matrix |
Date: |
Tue, 19 Dec 2006 18:08:27 +0100 |
User-agent: |
Thunderbird 1.5.0.8 (X11/20061115) |
Bill Denney wrote:
> You can do something like
>
> a = 1:10;
> b = a([1:5 7:10])
Sure; this is selectively _including_ elements of a vector/matrix (in
this case, elements 1-5 and 7-10). I was wondering if there's a
comparably simple notation for _excluding_ elements.
The reason I ask is that, for example, if I want to remove element k
from a given vector, there are special cases. I can't just write,
a = a([1:(k-1) (k+1):columns(a)])
because obviously I might have k=1 or k=columns(a).
It would simplify things a lot if instead of having to write extra lines
to take into account these special cases, there were a notation giving
"everything but element k".
- autocorrelation, Francesco Potorti`, 2006/12/18
- Re: autocorrelation, Paul Kienzle, 2006/12/18
- Excluding elements of a matrix, Joseph Wakeling, 2006/12/19
- Re: Excluding elements of a matrix, Jordi Gutierrez Hermoso, 2006/12/19
- Re: Excluding elements of a matrix, Francesco Potorti`, 2006/12/19
- Re: Excluding elements of a matrix, Quentin Spencer, 2006/12/19
- Re: Excluding elements of a matrix, Joseph Wakeling, 2006/12/19
- Re: Excluding elements of a matrix, antonio palestrini, 2006/12/19
- Re: Excluding elements of a matrix, Jordi Gutierrez Hermoso, 2006/12/19
- Re: Excluding elements of a matrix, John W. Eaton, 2006/12/19