isa

Tests whether a value belongs to a class or to a class category.

Category: Language Fundamentals > Data Types

Syntax

tf = isa(obj, classname)

Description

'numeric' covers all integer and floating-point classes, 'float' covers single and double, and 'integer' covers the signed and unsigned integers. Logical and char are not numeric. Unlike strcmp(class(x), ...), isa also respects class hierarchies.

Input arguments

obj

Any value.

classname

Class name such as 'double' or 'struct', or one of the categories 'numeric', 'float', 'integer'. A cell array tests several names.

Output arguments

tf

Logical scalar (or an array when classname is a cell array).

Example

Classes and categories

isa(5, 'numeric')
isa(int8(1), 'integer')
isa(int8(1), 'float')
isa(single(1), 'float')
isa(true, 'numeric')

ans = logical
   1
ans = logical
   1
ans = logical
   0
ans = logical
   1
ans = logical
   0

See also

class isnumeric isfloat isinteger validateattributes