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Re: Need a function to multiply the elements of an array [message #4062 is a reply to message #4052]

Wed, 26 April 1995 00:00

dan
Messages: 27
Registered: March 1993

Junior Member

In article <3nm2uk$qqq@pinot.umd.edu>, barsam@Glue.umd.edu (Barsam Marasli) writes:
|>
|> Hi,
|>
|> I am looking for a routine to multiply the elements of an array.
|> Is there a faster way of doing it than the following?
|>
|>
|> function prod, x
|> n = n_elements(x)-1
|> z = 1.d0
|> for i = 0, n do z = z * x(i)
|> return, z
|> end
|>
|>
|>
|> BM
|>

How about

z = exp(total(alog(x)))

Which only works if all x's greater than zero.
--
************************************************************ ***
** Dan Bergmann dbergmann@llnl.gov **
** Global Climate Research fax (510) 422-5844 **
** Lawrence Livermore National Lab human (510) 423-6765 **

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[Message index]

		Re: Need a function to multiply the elements of an array By: barsam on Thu, 27 April 1995 00:00
		Re: Need a function to multiply the elements of an array By: adorf on Thu, 27 April 1995 00:00
		Re: Need a function to multiply the elements of an array By: dan on Wed, 26 April 1995 00:00

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