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Identifying Numeric Types

You can check the data type of a variable x using any of these commands.

Command
Operation
whos x
Display the data type of x.
xType = class(x);
Assign the data type of x to a variable.
isnumeric(x)
Determine if x is a numeric type.
isa(x, 'integer')
isa(x, 'uint64')
isa(x, 'float')
isa(x, 'double')
isa(x, 'single')

Determine if x is the specified numeric type. (Examples for any integer, unsigned 64-bit integer, any floating point, double precision, and single precision are shown here).
isreal(x)
Determine if x is real or complex.
isnan(x)
Determine if x is Not a Number (NaN).
isinf(x)
Determine if x is infinite.
isfinite(x)
Determine if x is finite.


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