stats/

resample.pro

topresample

result = resample(n, tot [, SEED=SEED] [, UNIQUE=UNIQUE] [, SORT=SORT])

create a uniform resampling of indicies from 0 to n_elements()-1

indicies must be [0:n_elements()-1], will add later the ability to choose from input indicies if needed

choose random points on [0, n_elements()] then truncate them all them all, and they may or may not be all unique

Return value

rs: resampled array with n elements

Parameters

n in required: the number of points to have in the resampling
tot in required: the number of elements in the array to resample

Keywords

SEED in optional: the seed value to use in the randomu command
UNIQUE in optional: forces the return indicies to be unique within the space
SORT in optional: return the with replacement array sorted, this is the default for the unique case

Examples

 print, resample(10,100)
 7    12    16    22    52    60    71    73    74    87

 for a "resample with replacement" make both n and tot the same
 print, resample(10,10)
 2           9           0           4           7           7           2           3
 0           2

Author information

History:: 26July2007 Brian Larsen rewriten in accordance with http://www.dfanning.com/code_tips/randomindex.html which just makes it faster Thu Mar 30 15:07:20 2006, Brian Larsen added UNIQUE keyword so that you can get non unique indicies from the procedure, also fixed issues caused by rounding instead of truncating Thu Mar 16 09:40:44 2006, Brian Larsen written and tested

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Modifcation date:	Mon Sep 22 12:40:08 2008
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