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Fast Implementation [message #31416]

Fri, 05 July 2002 08:56

Isa Usman
Messages: 13
Registered: October 2001

Junior Member

Hi,

I have the bit of code below which calculates the number of points in all
four quandrants of a 2d space. Unfortunately my arrays are very large and it
takes quite a while to run.Is there a way of making the code faster.

Thanks in advance!

Isa
@@@@@@@@@@@@
;Data samples
for j=0L,n1-1 do begin
x0=X(j)
y0=Y(j)

index=where(X gt x0 and Y gt y0,count1)
index=where(X lt x0 and Y gt y0,count2)
index=where(X lt x0 and Y lt y0,count3)
index=where(X gt x0 and Y lt y0,count4)

na=count1
nb=count2
nc=count3
nd=count4

points(j,0:3)=float([na,nb,nc,nd])/n2

endfor

--
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