Translating the J answers back into English
perhaps would provide some insight:
3 2 * "1 dat
multiply every row
And working forwards from your specifications:
multiply say 3 2 by every row
* "1
----- Original Message -----
From: NEIL JAMES HOSEY <[EMAIL PROTECTED]>
Date: Sunday, April 29, 2007 3:12 am
Subject: [Jprogramming] Matrix Multiplication Problem
> Hi all,
>
> Greatly appreciate the comments about boxing last week. It
> solved my problem.
>
> I have one more question ( maybe too simple) about a certain
> form of matrix multiplication ( i think its point to point?)
>
> Anyway say I have data matrix dat
> where:
>
> dat=
>
> 0 1
> 1 0
> 0 0
> 1 1
>
> how can I multiply say 3 2 by every row. Resulting in the
> following matrix:
>
> dat =
> 0 2
> 3 0
> 0 0
> 3 2
>
> I thought that this form of multiplication was done with
> +/.* but I am getting domain errors.
>
> Apologies about the simplcity of this question but its
> driving me mad!!
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