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Crear objetos de punto fijo en MATLAB

Uso de fi y numerictype para la creación de datos de punto fijo

Puede crear datos de punto fijo utilizando el objeto fi de Fixed-Point Designer™. Dentro del constructor de fi se pueden especificar propiedades numerictype y fimath. Cada objeto fi tiene un objeto numerictype asociado. El objeto numerictype almacena información sobre el objeto fi, incluida la longitud de palabra, la longitud de fracción y representación de signo. El objeto numerictype es equivalente al objeto fixdt en Simulink^®.

Funciones

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Crear objetos numéricos de punto fijo

`fi`	Crear un objeto numérico de punto fijo

Ajustes matemáticos de punto fijo

`fimath`	Set fixed-point math settings
`fixed.fimathLike`	Return `fimath` object like the input (desde 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

Preferencias de punto fijo

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

Propiedades de objetos `fi`

`lowerbound`	Límite inferior del rango del objeto `fi`
`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`	Límite superior del rango del objeto `fi`
`sort`	Sort elements of real-valued `fi` object in ascending or descending order

Objetos y propiedades

`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 (desde R2021a)
`reset`	Reset objects to initial conditions
`set`	Set or display property values for `quantizer` objects
`mat2str`	Convertir matriz en cadena
`tostring`	Convertir un objeto `fi`, `fimath`, `numerictype` o `quantizer` en una cadena

Clases

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

Temas

Crear objetos numéricos de punto fijo

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^®.

Ajustes matemáticos de punto fijo

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.

Preferencias de punto fijo

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.

Información sobre el tipo numérico

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.

Aplicaciones

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.