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Re: "ALOG2" ? [message #14856 is a reply to message #14853]

Mon, 05 April 1999 00:00

Eric Vella
Messages: 8
Registered: April 1999

Junior Member

How about simply ALOG2(X) = ALOG(X) / ALOG(2)
or approximately ALOG2(X) = ALOG(X) / 0.69315 ?

ALOG2 is the function you want (log base 2), ALOG is the standard
logarithm (log base e) which IDL knows. Dust off an old math book on
logarithms to see why this works.

Amara Graps wrote:

> Hi Folks,
>
> Does anyone have an IDL function to compute the logarithm
> base 2 of the elements of an array?
> ...

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[Message index]

		Re: "ALOG2" ? By: steinhh on Tue, 06 April 1999 00:00
		Re: "ALOG2" ? By: Eric Vella on Mon, 05 April 1999 00:00
		Re: "ALOG2" ? By: davidf on Sat, 03 April 1999 00:00
		Re: "ALOG2" ? By: steinhh on Sat, 03 April 1999 00:00

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