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quick search of array [message #44571]

Thu, 23 June 2005 09:36

tanqian
Messages: 1
Registered: June 2005

Junior Member

Hi,

I have four arraies

all_time = fltarr(10000)
all_location = fltarr(3, 10000)

sel_time = fltarr(4000)
sel_location = fltarr(3,4000)

the 'sel_time' is a subset of 'all_time'. Is there a quick way I could
find index 'j' of all_time for each sel_time(i) (when
abs(all_time(j)-sel_time(i)) lt 1e-5)? So I could use that index to
pick the sel_location from all_location for each sel_time(i). Since I
have multiple(~20000) such tests, loop through both of them will be too
time consuming.

Should I sort both all_time and sel_time to descent/ascent order to
speed it up?

Thanks,

Qian
Qian

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quick search of array

By: tanqian on Thu, 23 June 2005 09:36

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