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Math Forum » Discussions » sci.math.* » sci.math.num-analysis.independent

Topic: dumb matrix question
Replies: 8   Last Post: May 12, 2011 3:14 AM

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robin

Posts: 30
Registered: 1/2/11
Re: dumb matrix question
Posted: May 11, 2011 8:44 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

"Eli Osherovich" <eli.osherovich@gmail.com> wrote in message news:iqdgc8$5la$1@dont-email.me...
| By the way, I do not know whether you prefer speed over short (and
| elegant?) code, however, in the past I ran extensive speed tests for a
| close problem: multiplying all matrix *columns* by a scalar. The fastest
| way was to use an explicit loop.

Since you were, in effect, multipying the entire array by a scalar,
the fastest way would be to overlay a vector over the entire array
and to multiply that by the scalar.





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