Re: matrix operations
- To: mathgroup at smc.vnet.net
- Subject: [mg46425] Re: matrix operations
- From: Paul Abbott <paul at physics.uwa.edu.au>
- Date: Tue, 17 Feb 2004 07:05:57 -0500 (EST)
- Organization: The University of Western Australia
- References: <c0mohe$65t$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
In article <c0mohe$65t$1 at smc.vnet.net>,
"paolo tarpanelli" <tarpanelli at libero.it> wrote:
> If I have a matrix
>
> a={x[[1,1]],x[[1,2]],...,x[[1,n]]}
> {x[[2,1]],x[[2,2]],...,x[[2,n]]}
> .
> .
> .
> {x[[m,1]],x[[m,2]],...,x[[m,n]]}
>
> how can I compute the difference between any element and the previous for
> each column :
ListConvolve is your friend:
ListConvolve[{{1}, {-1}}, a]
Cheers,
Paul
--
Paul Abbott Phone: +61 8 9380 2734
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