comp.lang.idl-pvwave archive: archive » Q: Quantil calculation in IDL?

Home » Public Forums » archive » Q: Quantil calculation in IDL?

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

Q: Quantil calculation in IDL? [message #17379]

Fri, 15 October 1999 00:00

joerg.mosthaf
Messages: 5
Registered: July 1999

Junior Member

Hi,
I have been searching the help files and David Fannings great book, but I can't
find a way to calculate 25%- and 75%-quantils. Unfortunately I don't know the
english name for this so let me explain: A 75%-quantil is like the median, but
with 75% instead of 50% i.e. the number in a data spread, that 75% of all
data points are less or equal to. Is there a way to do this fast on an
256x256 array? I need it to cut off noise at a specific level and to get a
reliable min/max value, not including data spikes. I am probably overlooking
something very easy, but I just couldn't find it.

Thanks,
Joerg Mosthaf

Report message to a moderator

[Message index]

		Q: Quantil calculation in IDL? By: joerg.mosthaf on Fri, 15 October 1999 00:00
		Re: Q: Quantil calculation in IDL? By: m218003 on Mon, 25 October 1999 00:00
		Re: Q: Quantil calculation in IDL? By: James Tappin on Mon, 18 October 1999 00:00
		Re: Q: Quantil calculation in IDL? By: joerg.mosthaf on Mon, 18 October 1999 00:00
		Re: Q: Quantil calculation in IDL? By: J.D. Smith on Fri, 15 October 1999 00:00
		Re: Q: Quantil calculation in IDL? By: J.D. Smith on Fri, 15 October 1999 00:00
		Re: Q: Quantil calculation in IDL? By: Pavel Romashkin on Fri, 15 October 1999 00:00
		Re: Q: Quantil calculation in IDL? By: davidf on Fri, 15 October 1999 00:00

Previous Topic:	Velocity vectors on maps
Next Topic:	DAY OF YEAR

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 15:35:03 PDT 2025

Total time taken to generate the page: 0.00417 seconds