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write more efficient for loop [message #91632]

Fri, 07 August 2015 06:25

g.nacarts
Messages: 148
Registered: November 2013

Senior Member

Hi

I used the Profiler, /SYSTEM & Profiler to identify which part of the code takes long time. I am using nested for loop (takes about 1950 sec).

N = 215L

Image_2 = make_array(N,N,/double)

for i=0L, N-1 do begin
for j=0L, N-1 do begin
x = round(i + A[i, j])
y = round(j + B[i, j])
if (x ge 0) && (y ge 0) then begin
Image_2[i,j] = Image_1[x, y]
endif
endfor
endfor

I was wondering if there is a more efficient way to write the above. I don't have a lot of experience in programming.

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[Message index]

		write more efficient for loop By: g.nacarts on Fri, 07 August 2015 06:25
		Re: write more efficient for loop By: Michael Galloy on Fri, 07 August 2015 06:50
		Re: write more efficient for loop By: g.nacarts on Fri, 07 August 2015 06:55
		Re: write more efficient for loop By: g.nacarts on Fri, 07 August 2015 12:39
		Re: write more efficient for loop By: Michael Galloy on Sun, 09 August 2015 18:26
		Re: write more efficient for loop By: g.nacarts on Mon, 10 August 2015 08:38

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