num2fixpt (Fixed-Point Blockset)

Quantize a value using a Fixed-Point Blockset representation

Syntax

outValue = num2fixpt(OrigValue,FixPtDataType,FixPtScaling,... 
RndMeth, DoSatur)

Description

num2fixpt casts a real-world value represented in floating-point doubles, OrigValue, as a fixed-point number, outValue.

OrigValue
Identifies the real-world value to be cast to fixed-point.

FixPtDataType
Designates the desired fixed-point data type of outValue.

FixPtScaling
Indicates the scaling of the output in either Slope or [Slope Bias] format.

RndMeth
Specifies the rounding technique to be used on the output. If FixPtDataType is FLOAT, then RndMeth is ignored.

DoSatur
Indicates whether the output should be saturated to the minimum or maximum representable value upon underflow or overflow. If FixPtDataType is FLOAT, then DoSatur is ignored.

`OrigValue`	Identifies the real-world value to be cast to fixed-point.
`FixPtDataType`	Designates the desired fixed-point data type of `outValue`.
`FixPtScaling`	Indicates the scaling of the output in either Slope or [Slope Bias] format.
`RndMeth`	Specifies the rounding technique to be used on the output. If `FixPtDataType` is `FLOAT`, then `RndMeth` is ignored.
`DoSatur`	Indicates whether the output should be saturated to the minimum or maximum representable value upon underflow or overflow. If `FixPtDataType` is `FLOAT`, then `DoSatur` is ignored.

Example

The command

num2fixpt(Pi,sfix(8),2^-5,'Nearest',on)

returns Pi as a signed 8-bit fixed-point number with scaling of 2^-5. Rounding is towards the nearest representable value, and overflows saturate.

fxptdlg sfix