Thanks, Brian - slip of the finger on the leftmost entry. Here is the
correct mask
mask=. 0 1 1 1 0, 1 1 1 1 1, 0 0 0 0 0,: 1 1 1 1 0
mask
0 1 1 1 0
1 1 1 1 1
0 0 0 0 0
1 1 1 1 0
Which indicates that from matrix mat, I would like the average of columns 1
2 3 of row one, all columns of row 2, none of row 3 and 0, 1, 2 and 3 of row
4.
Thus for mat
0 1 2 3 4
5 6 7 8 9
10 11 12 13 14
15 16 17 18 19
I would like 3 numbers output - 2 for row 1, 7 for row 2 and 16.5 for row 4
Thanks
Bob
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Brian Schott
Sent: December 2, 2009 12:22 PM
To: Programming forum
Subject: Re: [Jprogramming] averages of non-zero elements of matrices
Bob,
Please give your desired output with the example, because your problem
specification is a little ambigous, especially with your definition of
mask, because its leftmost entry has only 4 elements and does not
agree with your stated result.
On Wed, Dec 2, 2009 at 11:11 AM, Robert O'Boyle <[email protected]>
wrote:
>
>
>
> mask=. 0 1 1 1, 1 1 1 1 1, 0 0 0 0 0,: 1 1 1 1 0
>
[snip]
> Which properly identifies the row entries but shifts row 0 to the left by
> one.
>
>
>
--
(B=) <-----my sig
Brian Schott
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