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8.2.5.12 categorical.removecats

Method: out = removecats (obj)

Removes all unused categories from obj. This is equivalent to out = squeezecats (obj).

Method: out = removecats (obj, oldcats)

Remove categories from categorical array.

Removes the specified categories from obj. Elements of obj whose values belonged to those categories are replaced with undefined.

newcats is a cellstr listing the category names to add to obj.