find mode of an array but if there is no mode then return a random number

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Johanna Popp 2022-3-3

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评论： Johanna Popp 2022-3-3

Hi all,

I am trying to find the mode of the columns in a matrix A. My problem is, if there is no similar value in the column, the mode function always returns the lowest possible number. Instead of the lowest possible numer I would like to have a random number from the collumn with no mode.

Any help would be appreciated!!

Thanks,

Johanna

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Answer 1

Steven Lord 2022-3-3

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Use the third output from a call to mode. If that third output is not a cell containing a scalar the mode is not unique and therefore I think you want to choose one of those elements as 'the' mode.

There's an example on its documentation page, 'Mode of Matrix Rows with Frequency and Multiplicity Information', that you may be able to adapt.

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Johanna Popp 2022-3-3

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Answer 2

Image Analyst 2022-3-3

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There are many ways to do this. For example you can use mode(), find(), unique(), histcounts(), and of course you'll need randi() or randperm(). Is this homework? If so what have you tried?

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