Simulink®

float

Create MATLAB^® structure describing floating-point data type

Syntax

a = float('single')
a = float('double')
a = float(TotalBits, ExpBits)

Description

float('single') returns a MATLAB structure that describes the data type of an IEEE^® single (32 total bits, 8 exponent bits).

float('double') returns a MATLAB structure that describes the data type of an IEEE double (64 total bits, 11 exponent bits).

float(TotalBits, ExpBits) returns a MATLAB structure that describes a nonstandard floating-point data type that mimics the IEEE style. That is, the numbers are normalized with a hidden leading one for all exponents except the smallest possible exponent. However, the largest possible exponent might not be treated as a flag for Infs and NaNs.

float is automatically called when a floating-point number is specified in a block dialog box.

Examples

Define a nonstandard, IEEE style, floating-point data type with 31 total bits (excluding the hidden leading one) and 9 exponent bits:

a = float(31,9)
a = 
       Class: 'FLOAT'
    MantBits: 21
     ExpBits: 9

See Also

fixdt, sfix, sfrac, sint, ufix, ufrac, uint

fixptbestprec

fxptdlg