How can I choose a random row from a specific multidimensional array?

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Abdulatif Alabdulatif on 30 Apr 2014

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Commented: Matt J on 30 Apr 2014

Accepted Answer: Matt J

Hi,

I have a multidimensional array X=(50,9), and I want to choose a random row of 50 exist rows in an array.

First row in this array is just scalar numbering from 1 up to 50, I do not know if this can help to pick a random row based on the first row value or not!

Thanks in advance!

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Matt J on 30 Apr 2014

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randomRow=X(randi(50),:);

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Abdulatif Alabdulatif on 30 Apr 2014

That was so quick : )

Thanks a lot.

Is it possible to replace the length of the array rows (50) with flexible statement to specify the number of rows in any array?

I just ask to generalise the answer rather than specified a specific value

Thanks again : )

Matt J on 30 Apr 2014

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Yes, see the size() command

[numRows,numCols]=size(X);

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