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remove duplicate elements from a multi-dimensional array efficiently in IDL [message #66331]

Fri, 01 May 2009 09:13

chenbo09@gmail.com
Messages: 15
Registered: May 2009

Junior Member

Hello, everyone!

Is there anyone knows a routine in IDL that be capable to remove
duplicate elements from a multi-dimensional array efficiently? I 'm
now working with huge arrays, and I have written one by myself, it
works but is with low efficiency.

example of my problem:
the input array:
1,10,9,100,200
2,11,8,101,201
2,11,8,101,201
3,10,9,100,200
4,7,12,99,199
2,11,8,101,201

goal:
remove the duplicate elements with the same values for the second and
the third column.

expected output:
1,10,9,100,200
2,11,8,101,201
4,7,12,99,199

Thanks for your help!

Bo

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