Erstellen von Festkomma-Objekten in MATLAB

fi und numerictype für die Festkomma-Datenerstellung

Mithife des Fixed-Point Designer™ fi-Objekts können Sie Festkommadaten erstellen. Im fi-Konstruktor können Sie die Eigenschaften numerictype und fimath festlegen. Mit jedem fi-Objekt ist ein numerictype-Objekt verknüpft. Im numerictype-Objekt werden Informationen zum fi-Objekt gespeichert, darunter Wortlänge, Bruchlänge und Vorzeichen. Das numerictype-Objekt entspricht dem fixdt-Objekt in Simulink^®.

Funktionen

alle erweitern

Konstruieren numerischer Festkomma-Objekte

`fi`	Construct fixed-point numeric object

Festkomma-Mathematikeinstellungen

`fimath`	Set fixed-point math settings
`fixed.fimathLike`	Return `fimath` object like the input (Seit R2022b)
`globalfimath`	Configure global fimath and return handle object
`removefimath`	Remove `fimath` from `fi` object
`removeglobalfimathpref`	Remove global fimath preference
`resetglobalfimath`	Set global fimath to MATLAB factory default
`setfimath`	Attach `fimath` object to `fi` object

Festkomma-Präferenzen

`fipref`	Set fixed-point preferences
`savefipref`	Save `fi` preferences for next MATLAB session
`isfipref`	Determine whether input is `fipref` object

Eigenschaften von `fi`-Objekten

`lowerbound`	Untergrenze des Bereichs eines `fi`-Objekts
`lsb`	Scaling of least significant bit of `fi` object, or value of least significant bit of `quantizer` object
`range`	Numerical range of `fi` or `quantizer` object
`upperbound`	Obergrenze des Bereichs eines `fi`-Objekts
`sort`	Sort elements of real-valued `fi` object in ascending or descending order

Objekte und Eigenschaften

`fixed.aggregateType`	Compute aggregate numerictype
`get`	Property values of object
`isequal`	Determine whether real-world values of two `fi` objects are equal, or determine whether properties of two `fimath`, `numerictype`, or `quantizer` objects are equal
`isequaln`	Determine equality of fixed-point arrays, treating NaN values as equal (Seit R2021a)
`reset`	Reset objects to initial conditions
`set`	Set or display property values for `quantizer` objects
`mat2str`	Convert matrix to string
`tostring`	Convert `fi`, `fimath`, `numerictype`, or `quantizer` object to string

Klassen

numerictype Construct an embedded.numerictype object describing fixed-point or floating-point data type

Themen

Konstruieren numerischer Festkomma-Objekte

Create Fixed-Point Data
This example shows the basics of how to use the fixed-point numeric object fi.
View Fixed-Point Data
Control display of fixed-point data properties using fipref.
Ways to Construct fi Objects
Build fi object constructors in the command line or by using a GUI.
Set fi Object Properties
Tells you how to find more information about the properties associated with fi objects, and shows you how to set these properties.
Fixed-Point Versus Built-in Integer Types
Differences between fixed-point data types and built-in integer data types in MATLAB^®.

Festkomma-Mathematikeinstellungen

fimath Object Construction
Creation of fimath objects.
fimath Object Properties
Properties and property settings associated with fimath objects.
fimath Properties Usage for Fixed-Point Arithmetic
Fixed-point arithmetic using fimath objects to control the results.
fimath for Sharing Arithmetic Rules
Using a fimath object to share modular arithmetic information among multiple fi objects.
fimath for Rounding and Overflow Modes
Order setting for overflow action and rounding method.
fimath ProductMode and SumMode
Differences among the different settings of the ProductMode and SumMode properties.
How Functions Use fimath
Functions that ignore or discard fimath.

Festkomma-Präferenzen

Set fi Object Display Preferences Using fipref
Examples of using fipref objects to set display preferences for fi objects.
Data Type Override Preferences Using fipref
Data type override using the fipref object.
Underflow and Overflow Logging Using fipref
Examples of using fipref objects to set logging preferences for fi objects.

Numerische Typeninformationen

numerictype Object Construction
Construction of numerictype objects.
numerictype Object Properties
Properties and property settings associated with numerictype objects.
numerictype of Fixed-Point Objects
Fields and settings for the numerictype object.
numerictype Objects Usage to Share Data Type and Scaling Settings of fi objects
Example of using a numerictype object to share modular data type and scaling information among multiple fi objects.

Anwendungen

Fixed-Point Design Exploration in Parallel
This example shows how to explore and test fixed-point designs by distributing tests across many computers in parallel.
Real-Time Image Acquisition, Image Processing, and Fixed-Point Blob Analysis for Target Practice Analysis
This example shows how to acquire real-time images from a GigE Vision® camera or webcam, process the images using fixed-point blob analysis, and determine world coordinates to score a laser pistol target.