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Re: multiplication by a diagonal matrix [message #40928 is a reply to message #40806]

Wed, 08 September 2004 05:50

lbusett
Messages: 9
Registered: March 2004

Junior Member

Hi all,

thanks for your answers !

I made some tests with different methods and for a matrix
A(10000,10)I had the following results:

"diag_matrix" method : processing time = 1600 seconds (!!)
"for loop" method: processing time = 0.02 seconds
"replicate" method (as suggested by Paolo Grigis in his answer):
processing time = 0.002 seconds

Well, when I posted my message I'd never expected to increase the
speed 800000 times ! Can it be possible ?

Thanks for the help.

Lorenzo Busetto

Remote Sensing Lab.
University of Milano-Bicocca

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[Message index]

		Re: multiplication by a diagonal matrix By: gnarloo on Fri, 03 September 2004 11:03
		Re: multiplication by a diagonal matrix By: JD Smith on Fri, 03 September 2004 08:01
		Re: multiplication by a diagonal matrix By: Craig Markwardt on Fri, 03 September 2004 07:42
		Re: multiplication by a diagonal matrix By: Paolo Grigis on Fri, 03 September 2004 05:32
		Re: multiplication by a diagonal matrix By: lbusett on Wed, 08 September 2004 05:50

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