sampling pairs of elements

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María Jesús
María Jesús 2015-2-27
回答： Guillaume 2015-2-28
Hi,
I'm trying to sample data from two vectors simultaneously, one is a population value and the other a point in time. I need to get the data to be sampled as a pair, that is, I need to be able to sample the population and retain the time at which it occurs. Is there a way to do that?
Thanks!

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回答（2 个）

dpb
dpb 2015-2-27
Select the sample from the indices 1:length(vector) and the use that to select the elements.
  2 个评论
María Jesús
María Jesús 2015-2-28
I'm not sure I understand... could you elaborate?
Guillaume
Guillaume 2015-2-28
编辑：Guillaume 2015-2-28
@dpb, numel is better than length since the latter can return the size of different dimensions with matrices). I'm of the opinion that length should never be used.

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Guillaume
Guillaume 2015-2-28
One simple way:
popvalues = [1 5 8 10 3 6 8 9 10 54 23 1]; %for example
poptimes = [4 10 16 14 12 18 20 24 22 2 6 8]; %for example
for sample = [popvalues; poptimes]
%do something with sample
%...
end

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