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Bug/feature in matrix multiply [message #14582]

Fri, 12 March 1999 00:00

Mark Fardal
Messages: 51
Registered: October 1995

Member

Hi,

is the following a bug or feature? I don't understand why changing the
type of the array changes the dimensions of the result. Then again,
it's late on Friday, so my brain might just be mush.

IDL> junk=fltarr(3)
IDL> junk=reform(junk,3,1)
IDL> help,junk
JUNK FLOAT = Array[3, 1]
IDL> help,[3.,2.,1.]#junk
<Expression> FLOAT = Array[1]
IDL> help,[3.d0,2.d0,1.d0]#junk
<Expression> DOUBLE = Array[3, 3]

this is with
IDL Version 5.2 (sunos sparc). Research Systems, Inc.

thanks,
Mark Fardal
UMass
fardal@weka.phast.umass.edu

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[Message index]

		Bug/feature in matrix multiply By: Mark Fardal on Fri, 12 March 1999 00:00
		Re: Bug/feature in matrix multiply By: Mark Fardal on Mon, 15 March 1999 00:00
		Re: Bug/feature in matrix multiply By: Martin Schultz on Mon, 15 March 1999 00:00
		Re: Bug/feature in matrix multiply By: Mark Fardal on Sun, 14 March 1999 00:00
		Re: Bug/feature in matrix multiply By: steinhh on Sat, 13 March 1999 00:00

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