MATLAB Programming Fundamentals - MathWorks

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

8 Categorical Arrays