How can one divide by a sparse matrix? If s is my sparse matrix %.s gives ``nonce error
On Mon, Jan 14, 2013 at 10:45 PM, Don & Cathy Kelly <[email protected]> wrote: > 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, >> >> > ------------------------------**------------------------------**---------- > For information about J forums see > http://www.jsoftware.com/**forums.htm<http://www.jsoftware.com/forums.htm> > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
