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samplepick

09 Mar 2010 (Updated 11 Mar 2010)

pick a random sample out of an array

File Information

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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Everyone's Tags	allocate, choose, control, draw, fraction, grab, pick, random, ratio, sample, samples, sampling, simulation, snap, statistics, take, test
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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