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Test for categorical array categories



tf = iscategory(A,catnames) returns an array containing logical 1 (true) where the data in catnames is a category of A. Otherwise, iscategory returns logical 0 (false).

tf is the same size as catnames.


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Create an ordinal categorical array, A.

A = categorical({'shirt' 'pants'; 'pants' 'hat'; 'shirt' 'pants'})
A = 3x2 categorical
     shirt      pants 
     pants      hat   
     shirt      pants 

A is a 3-by-2 categorical array.

Test if the articles of clothing, shirt, pants, socks, and shoes, are categories of A.

catnames = {'shirt' 'pants' 'socks' 'shoes'};
tf = iscategory(A,catnames)
tf = 1x4 logical array

   1   1   0   0

shirt and pants are categories of A, but socks and shoes are not.

iscategory does not tell us anything about the category, hat, which we did not include in catnames.

Create a categorical array, A.

A = categorical({'plane' 'car' 'train' 'car' 'plane'},...
    {'boat' 'car' 'plane' 'train'})
A = 1x5 categorical
     plane      car      train      car      plane 

A is a 1-by-5 categorical array.

Test to see if boat is a category in A.

tf = iscategory(A,'boat')
tf = logical

iscategory returns true, even though A does not contain any values from the category boat.

Input Arguments

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Categorical array, specified as a vector, matrix, or multidimensional array.

Category names, specified as a character vector, cell array of character vectors, string array, or categorical array.

Extended Capabilities

Introduced in R2013b