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Interpolate whole array instead of looping through elements [message #94325]

Tue, 11 April 2017 09:18

liam.steele
Messages: 13
Registered: September 2015

Junior Member

Hi all,

I have a 4D array (say temperatures) ordered as temp[nlat,nlon,nlev,ntime], where the elements are the number of latitudes, longitudes, vertical levels and times. What I want to do is interpolate the lat/lon data to a specified point or points, but for each level and time. So, at the moment my code would look like:

out_vals = fltarr(nlev, ntime)
for i = 0, ntime-1 do begin
for j = 0, nlev-1 do begin
out_vals[j,i] = bilinear(temp[*,*,j,i],ival,jval)
endfor
endfor

where ival and jval are the points I want to interpolate to. However, there are lots of levels and times, and so the loop procedure can take a while.

Is there any method where one or both of the loops can be removed, and the interpolation can be carried out on the entire array (i.e. on the time and level dimensions at the same time)? I've tried to think of a quicker method, but I'm stumped.

Many thanks,

Liam

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[Message index]

		Interpolate whole array instead of looping through elements By: liam.steele on Tue, 11 April 2017 09:18
		Re: Interpolate whole array instead of looping through elements By: Craig Markwardt on Tue, 11 April 2017 12:07
		Re: Interpolate whole array instead of looping through elements By: liam.steele on Wed, 12 April 2017 16:50
		Re: Interpolate whole array instead of looping through elements By: wlandsman on Wed, 12 April 2017 21:10
		Re: Interpolate whole array instead of looping through elements By: Markus Schmassmann on Thu, 13 April 2017 05:21
		Re: Interpolate whole array instead of looping through elements By: liam.steele on Thu, 13 April 2017 10:02

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