isa

Returns result R if the input, v, belongs to the class, class.

Syntax

R = isa(v, class)

Inputs

v
Given input variable.
class
Class name to check for. In addition to specific class names, class can also have the following values:
'integer'
Returns true if v is an integer.
'float'
Returns true if v is a scalar.
'double'
Returns true if v is a scalar.
'numeric'
Returns true if v is an integer or a scalar.
Type: string | cell

Outputs

R
R is true if v belongs to class. If class is of type cell, R will also be of type cell, with the same size as R and each element containing the result of the isa command.
Type: logical | cell

Examples

Logical output example, checking for subclass:
classdef shape
properties
color
end
methods
function s=shape(color1)
s.color = color1;
end
function disp(s)
fprintf('The shape has color %s\n',     s.color);
end
end
end

classdef circle < shape
properties
r
end

methods
c = c@shape(color); % Special construct for instantiating the superclass
end

function disp(c)
disp@shape(c); % Call the superclass display first (optional)
end
end
end
c = circle(3,'blue');
R1 = isa(c, 'circle')
R2 = isa(c, 'shape')
R1 = 1
R2 = 1
Cell output example:
R = isa([1;2;3], {'double', 'float', 'integer', 'numeric', 'foo'})
R =
{
[1,1] 1
[1,2] 1
[1,3] 0
[1,4] 1
[1,5] 0
}