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samplepick

by Mauro

 

09 Mar 2010 (Updated 11 Mar 2010)

Code covered by the BSD License  

pick a random sample out of an array

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Description

To test al model, with real data it can be useful to pick a smaller sample out of a bigger dataset.

An other application could be to decide how small a random sample should be to see if the process is working property.
MATLAB release MATLAB 7.9 (2009b)
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Other Files license.txt,
samplepick.m
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Comments and Ratings (2)
10 Mar 2010 Darren Rowland

The function randperm is practically ready-made for this application. To draw a subset, s, of size m from a dataset, d, of size n, one can simply do

perm = randperm(n);
s = d(perm(1:m));
10 Mar 2010 Mauro

jep, and it's faster ;-) ...
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Updates
11 Mar 2010

works now with randperm
Tag Activity for this File
Tag Applied By Date/Time
statistics Mauro 09 Mar 2010 11:00:47
simulation Mauro 09 Mar 2010 11:00:47
random Mauro 09 Mar 2010 11:00:47
sample Mauro 09 Mar 2010 11:00:47
samples Mauro 09 Mar 2010 11:00:47
sampling Mauro 09 Mar 2010 11:00:47
test Mauro 09 Mar 2010 11:00:47
pick Mauro 09 Mar 2010 11:00:47
choose Mauro 09 Mar 2010 11:00:47
snap Mauro 09 Mar 2010 11:00:47
grab Mauro 09 Mar 2010 11:00:47
control Mauro 09 Mar 2010 11:00:47
allocate Mauro 09 Mar 2010 11:00:47
take Mauro 09 Mar 2010 11:00:47
draw Mauro 09 Mar 2010 11:00:47
ratio Mauro 09 Mar 2010 11:00:47
fraction Mauro 09 Mar 2010 11:00:47

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