comp.lang.idl-pvwave archive: archive » Re: histogram, how to trasfer from linear bins to logarithmic bin?

Home » Public Forums » archive » Re: histogram, how to trasfer from linear bins to logarithmic bin?

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: histogram, how to trasfer from linear bins to logarithmic bin? [message #68153 is a reply to message #68152]

Wed, 30 September 2009 12:25

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

JDS writes:

> Very good point. The sort is over the bin vector, which can be (and
> usually is) much shorter than the data vector. And you will likely
> setup your bin boundary vector sorted to begin with. That said, for
> me HISTOGRAM(ALOG10) is still faster than HISTOGRAM(VALUE_LOCATE) (see
> below). You'll also note some "sky is falling" razors-edge
> differences between bins if you look closely.

Yes, I can believe this for logarithmic bins.
I should have been more careful to point out that
the partitioning examples I was raving about are
actually using irregularly sized bins, something
that can only be done in the IDL Way (as far as
I know) with Value_Locate.

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

Report message to a moderator

[Message index]

		Re: histogram, how to trasfer from linear bins to logarithmic bin? By: Jeremy Bailin on Thu, 01 October 2009 11:59
		Re: histogram, how to trasfer from linear bins to logarithmic bin? By: Jeremy Bailin on Thu, 01 October 2009 11:53
		Re: histogram, how to trasfer from linear bins to logarithmic bin? By: David Fanning on Wed, 30 September 2009 12:29
		Re: histogram, how to trasfer from linear bins to logarithmic bin? By: David Fanning on Wed, 30 September 2009 12:25
		Re: histogram, how to trasfer from linear bins to logarithmic bin? By: JDS on Wed, 30 September 2009 11:58
		Re: histogram, how to trasfer from linear bins to logarithmic bin? By: David Fanning on Tue, 29 September 2009 14:51
		Re: histogram, how to trasfer from linear bins to logarithmic bin? By: JDS on Tue, 29 September 2009 14:33
		Re: histogram, how to trasfer from linear bins to logarithmic bin? By: Brian Larsen on Tue, 29 September 2009 07:35
		Re: histogram, how to trasfer from linear bins to logarithmic bin? By: Brian Larsen on Tue, 29 September 2009 07:31
		Re: histogram, how to trasfer from linear bins to logarithmic bin? By: David Fanning on Mon, 28 September 2009 15:54
		Re: histogram, how to trasfer from linear bins to logarithmic bin? By: penteado on Sun, 27 September 2009 19:48

Previous Topic:	Re: Probably a really simple read_ascii quesion....
Next Topic:	Polynomial Fitting question

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sat Oct 11 22:01:44 PDT 2025

Total time taken to generate the page: 1.26856 seconds