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Re: Hovmoller [message #89123 is a reply to message #89122]

Fri, 25 July 2014 13:49

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

tjc0010@uah.edu writes:

> Well I have about 20 files and will want to show eastward propagation with time

Ah, so you have more than one file. As Wesley says in the Princess
Bride, "Why didn't you mention the wheelbarrow among our assets the
first time?"

Presumably these files contain data points at different times. Perhaps
you have 20 such times. Now we are getting somewhere!

What you have to do is build up a 2D array by selecting for longitude
and saving the temperatures at those longitudes.

ntimes = 20

; Read the first file, just to see how big array has to be.
... read the data file, extract variables, etc.
lonIndices = where(lons gt -25 and lons lt 40)

; Temperature at longitude and time
data = FltArr(N_Elements(lonIndices), ntimes)
temps = temps[lonIndices]
times = FltArr(ntimes)

; Read the files in a loop and extract info for Hovmoller plot.
for j=0,19 DO BEGIN
... Read file, extract variables, etc.
times = time[0]
data[*,j] = temps[lonIndices]
endfor

Now, make your plot...

cgContour, data, times, lons[lonIndices], ... ; Hovmoller plot

Cheers,

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

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[Message index]

		Hovmoller By: tjc0010 on Thu, 24 July 2014 12:39
		Re: Hovmoller By: David Fanning on Fri, 25 July 2014 06:36
		Re: Hovmoller By: tjc0010 on Fri, 25 July 2014 11:27
		Re: Hovmoller By: David Fanning on Fri, 25 July 2014 11:47
		Re: Hovmoller By: tjc0010 on Fri, 25 July 2014 12:41
		Re: Hovmoller By: David Fanning on Fri, 25 July 2014 13:20
		Re: Hovmoller By: tjc0010 on Fri, 25 July 2014 13:22
		Re: Hovmoller By: David Fanning on Fri, 25 July 2014 13:49
		Re: Hovmoller By: laura.hike on Wed, 27 December 2017 12:30
		Re: Hovmoller By: Jim Pendleton on Wed, 27 December 2017 18:52
		Re: Hovmoller By: laura.hike on Fri, 29 December 2017 14:22
		Re: Hovmoller By: tjc0010 on Mon, 28 July 2014 12:41

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