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Re: Can I use HISTOGRAM to do this? [message #39991]

Tue, 29 June 2004 01:08

Chris Lee
Messages: 101
Registered: August 2003

Senior Member

In article <6e84eb0a.0406281357.6a6cde84@posting.google.com>, "bridgemat"
<bridgemat@yahoo.com> wrote:

> Re: Can I use HISTOGRAM to do this?

Histogram can do anything, no really :)

I'm dutybound to refer you to the histogram tutorial at

http://www.dfanning.com/tips/histogram_tutorial.html

You want to read the section on Reverse indices. Essentially, histogram
can give you the index numbers of the elements which go into each bin in
your histogram, so..

hist=histogram(geo.lat,min=30,max=90,nbins=61,reverse_indice s=ri)
ind=indgen(61) + 30.5
avg=fltarr(61)
value=fltarr(90,90) ; your array of time values

;the histogram tutorial says what each element of 'ri' is for
for i=0, 60 do if(ind[i] ne 0) then avg[i]=mean(value[ ri[ ri[i]:ri[i+1]-1 ] ])

;end

Chris

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Re: Can I use HISTOGRAM to do this?

By: Chris Lee on Tue, 29 June 2004 01:08

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