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Creazione di oggetti in virgola fissa in MATLAB

fi e numerictype per creare dati in virgola fissa

È possibile creare dati in virgola fissa utilizzando l'oggetto Fixed-Point Designer™ fi. All’interno del costruttore fi è possibile specificare le proprietà numerictype e fimath. Ogni oggetto fi ha un oggetto numerictype associato. L'oggetto numerictype memorizza le informazioni sull'oggetto fi comprese la lunghezza della parola, la lunghezza della frazione e la presenza del segno. L'oggetto numerictype è equivalente all'oggetto fixdt in Simulink^®.

Funzioni

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Costruzione di oggetti numerici in virgola fissa

`fi`	Construct fixed-point numeric object

Impostazioni per la matematica in virgola fissa

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

Preferenze in virgola fissa

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

Proprietà degli oggetti `fi`

`lowerbound`	Lower bound of range of `fi` object
`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`	Upper bound of range of `fi` object
`sort`	Sort elements of real-valued `fi` object in ascending or descending order

Oggetti e proprietà

`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 (Da 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

Classi

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

Argomenti

Costruzione di oggetti numerici in virgola fissa

Create Fixed-Point Data
This example shows the basics of how to use the fixed-point numeric object fi.
Visualizzazione dati in virgola fissa
Controllare la visualizzazione delle proprietà dei dati in virgola fissa utilizzando 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^®.

Impostazioni per la matematica in virgola fissa

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.

Preferenze in virgola fissa

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.

Informazioni sul tipo numerico

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.

Applicazioni

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.