Core Functions Supporting Categorical Arrays

Many functions in MATLAB^® operate on categorical arrays in much the same way that they operate on other arrays. A few of these functions might exhibit special behavior when operating on a categorical array. If multiple input arguments are ordinal categorical arrays, the function often requires that they have the same set of categories, including order. Furthermore, a few functions, such as max and gt, require that the input categorical arrays are ordinal.

The following table lists notable MATLAB functions that operate on categorical arrays in addition to other arrays.

size length ndims numel isrow iscolumn cat horzcat vertcat

isequal isequaln eq ne lt le ge gt min max median mode

intersect ismember setdiff setxor unique union times sort sortrows issorted permute reshape transpose ctranspose

plot plot3 scatter scatter3 bar barh histogram pie rose stem stairs area mesh surf surface semilogx semilogy fill fill3 line text

double single int8 int16 int32 int64 uint8 uint16 uint32 uint64 char string cellstr