Wow- that is what I want.
Thanks
Don
On 14/01/2013 2:13 PM, Raul Miller wrote:
Here's a bit of code to build a sparse symmetric matrix with 0 as the
sparse value:
symamend=: ,~@:({:"1)@[`((<"1@,|."1)@:(}:"1)@[)`]}
buildsym=: ] symamend 1 $. [;i.@#@[;0:
Example use:
2 2 buildsym 0 0 5,0 1 _1,:1 1 6
0 0 | 5
0 1 | _1
1 0 | _1
1 1 | 6
Left argument is the shape of the sparse array, right argument is the
data. Note that you'll get an error if the data cannot be contained
within the shape.
FYI,
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