...
and arithmetic is OK for most applications too
dm=:[EMAIL PROTECTED]@#
dm 4 5 6
4 0 0
0 5 0
0 0 6
dm 4 5 6 _8
4 0 0 0
0 5 0 0
0 0 6 0
0 0 0 _8
odm=:[EMAIL PROTECTED]@[EMAIL PROTECTED]
odm i.4 4
0 1 2 3
4 0 6 7
8 9 0 11
12 13 14 0
sdm=: [EMAIL PROTECTED] + [EMAIL PROTECTED]
(i.4 4) sdm _1 _2 _3 _4
_1 1 2 3
4 _2 6 7
8 9 _3 11
12 13 14 _4
but Raul's is more general and I suspect fater too
Best,
Cliff
Leigh J. Halliwell wrote:
Dear J Forum:
I know that (<0 1) |: takes the values of the main diagonal of a matrix.
But if I want to set the values of the main diagonal is there a similar
shortcut? For now I'm using (1 1);(2 2); . ; (n n)}, but suspect that
there's a better way. Thanks.
Sincerely,
Leigh
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--
Clifford A. Reiter
Mathematics Department, Lafayette College
Easton, PA 18042 USA, 610-330-5277
http://www.lafayette.edu/~reiterc
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