Community Profile

photo

MathWorks Fixed Point Team

MathWorks

Last seen: Today 2017년부터 활동

Statistics

All
  • Thankful Level 2
  • Knowledgeable Level 1
  • Revival Level 1
  • First Answer

배지 보기

Content Feed

보기 기준

답변 있음
FAQ: Why is a fixed-point type's Fraction Length or Integer Length sometimes negative?
Maximizing precision for limited bits The ability to have a negative fraction lengths or a negative integer lengths is a very g...

약 1달 전 | 0

| 수락됨

질문


FAQ: Why is a fixed-point type's Fraction Length or Integer Length sometimes negative?
Sometimes fixed-point variables have fraction lengths that are negative. a = 5.6632765314184e+15 aFi = fi(a,1,4) curFractionL...

약 1달 전 | 답변 수: 1 | 0

1

답변

질문


Why does fi signed plus unsigned produce needless range bits?
When adding signed and unsigned fi variables with the default full-precision settings, sometimes the output type has needless ra...

약 2달 전 | 답변 수: 1 | 0

1

답변

질문


How can I use int64 and uint64 with my Simulink S-function?
How can I use int64 and uint64 with my Simulink S-function?

10달 전 | 답변 수: 1 | 0

1

답변

질문


Why does Simulink's Weighted Sample Time block sometimes use fixed-point data types for its output?
In Simulink, I want to get the sample time of a signal and use that value in other calculations. The Weighted Sample Time block ...

12달 전 | 답변 수: 1 | 0

1

답변

질문


How can I use fractional data types when the values are beyond the interval [-1, +1) ?
Many references describe implementing fixed-point designs using fractional data types. These signed fractional data types repres...

1년 이상 전 | 답변 수: 1 | 0

1

답변

질문


FAQ: Why aren't boolean and 1 bit unsigned integers treated as the same data type?
Variables and signals of the boolean data type (called logical in MATLAB) only represent the values 0 and 1. Variables and sign...

약 2년 전 | 답변 수: 1 | 0

1

답변

질문


Best practices for converting MATLAB code to fixed point
I have tried to use fixed-point data types (i.e. fi) for MATLAB code. Are there any best practices for this process?

약 2년 전 | 답변 수: 1 | 0

1

답변

질문


Some forms of Simulink logging write 64 bit integers as fi objects. Does that mean I need a Fixed-Point Designer license?
I've observed that some forms of logging in Simulink write integer variables out to MATLAB as fi objects. For example, DSP Bina...

약 2년 전 | 답변 수: 1 | 0

1

답변

답변 있음
How can I use custom constraints for fxpopt?
fxpopt workflow allows user to automatically assign fixed-point data types on a system by trying a basic trial and error loop. ...

약 2년 전 | 0

| 수락됨

질문


How can I use custom constraints for fxpopt?
I am trying to use fxpopt with custom constraints and I cannot figure out how to do it. I am trying to have optimization be base...

약 2년 전 | 답변 수: 1 | 0

1

답변

답변 있음
Why is matlab fixed pint arithmetic so slow?
Hi, There are two aspects to speed that you may be concerned about. The first is the speed of generated code running on your e...

2년 이상 전 | 0

답변 있음
fixed point to the power 0 changes word length
fi's element-wise power a.^b https://www.mathworks.com/help/fixedpoint/ref/embedded.fi.power.html is not designed to give t...

2년 이상 전 | 0

답변 있음
How do I show the hex or binary representation for an integer or fixed-point signal in Simulink?
Simulink provides two ways to show hex and binary of signals, Display Block, and Simulink Value Display (yellow boxes). To do t...

2년 이상 전 | 0

| 수락됨

질문


How do I show the hex or binary representation for an integer or fixed-point signal in Simulink?
When designing or debugging integer or fixed-point algorithms, there are many cases where it is helpful for the display of value...

2년 이상 전 | 답변 수: 1 | 0

1

답변

답변 있음
How do I show the hex or binary representation for an integer or fixed-point variable in MATLAB?
Use of MATLAB's format command and/or Fixed-Point Designer's fipref object can be use to achieve hex display, binary display, or...

2년 이상 전 | 0

| 수락됨

질문


How do I show the hex or binary representation for an integer or fixed-point variable in MATLAB?
When designing or debugging integer or fixed-point algorithms, there are many cases where it is helpful for the display of value...

2년 이상 전 | 답변 수: 1 | 1

1

답변

답변 있음
Internal error in deep neural network quantification?
To avoid a ‘coder.internal.getSupportedLayerTypes’ error on creation of a dlquantizer object, install the ‘GPU Coder Interface ...

2년 이상 전 | 0

답변 있음
How can I export ranges from the Fixed-Point Tool to an excel sheet?
Currently (as of 20a) there is no way to automatically export data you see in the spreadsheet. Nevertheless you can use the Comm...

2년 이상 전 | 0

| 수락됨

질문


How can I export ranges from the Fixed-Point Tool to an excel sheet?
I would like to export the range information I see on the spreadsheet of the Fixed-Point Tool to an excel sheet to share with my...

2년 이상 전 | 답변 수: 1 | 0

1

답변

답변 있음
What does the shared simulation range mean in the Fixed-Point Tool?
The Fixed-Point Tool collects ranges and proposes data types by data type groups rather than individual blocks. A Data type gr...

3년 이하 전 | 0

| 수락됨

질문


What does the shared simulation range mean in the Fixed-Point Tool?
I am using the Fixed-Point Tool to propose data types and I see that my signal has the specified design range, but it also has a...

3년 이하 전 | 답변 수: 1 | 0

1

답변

답변 있음
What does this mean and how can I get rid of it ?
Hello, please refer to this answer for more information on what this error means. Could you please add your model and script you...

3년 이하 전 | 0

답변 있음
Wrong conversion from double to fixed point
Hello, you can try to use any of the Fixed-Point designer workflows to achieve this task. Please find attached a script that u...

3년 이하 전 | 2

답변 있음
Where can I find some introductory material for Fixed Point?
The following resources provide a good overview of the basic concepts for you to get started with fixed-point: These resources...

3년 이하 전 | 2

| 수락됨

질문


Where can I find some introductory material for Fixed Point?
Are there some useful resources to get started with fixed-point basic concepts?

3년 이하 전 | 답변 수: 1 | 0

1

답변

답변 있음
Wrap/Saturate on overflow
I think it’s important to understand if these overflows are a concern in the context of the numerical behavior of your control a...

3년 이하 전 | 4

답변 있음
How to use derived ranges for gain and constant blocks using derive range analysis?
In this scenario, your parameter is not considered as tunable and therefore treated as an invariant constant. So the design rang...

3년 이하 전 | 2

| 수락됨

질문


How to use derived ranges for gain and constant blocks using derive range analysis?
I am trying to use derived range analysis and I am specifying design min, max for the gain block parameter as shown in the model...

3년 이하 전 | 답변 수: 1 | 0

1

답변

답변 있음
Why do I get this error when I am using fxpopt for fixed-point Optimization: Inconsistent numeric values for port 1 ...
This happens when your model simulation violates your design ranges (min, max specifications). Fxpopt throws this error, as it c...

3년 이하 전 | 2

| 수락됨

더 보기