Thank yous very much for the advice. I was not sure how "1 worked until now.
Neil > 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!! > ---------------------------------------------------------- > ------------ For information about J forums see > http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
