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Andy Bartlett

MathWorks

Last seen: 5 giorni ago Active since 2015

Andy leads the Fixed-Point Designer development team.

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Answered
Evaluate surface fit in Simulink
Please see if the answer here helps.

21 giorni ago | 0

Answered
How to use cfit objects in Simulink?
The attached model and MATLAB code show how a fit created with Curve Fitting Toolbox can be called from a MATLAB Function Block ...

21 giorni ago | 1

Answered
Why does Simulink's Weighted Sample Time block sometimes use fixed-point data types for its output?
Weighted Sample Time block is Polymorphic The Weighted Sample Time Math block is numeric type polymorphic. For inputs, it suppo...

circa un mese ago | 0

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Answered
Update matrix values inside MATLAB Function block
Something to be aware of is that MATLAB Function Block primarily uses code generation mode and not interpreted mode. Interprete...

circa un mese ago | 0

Answered
How can I use fixdt-tool to convert a matrx variable which has huge range difference of diffenent elements
Fixed-Point Designer does not support per element scaling for vectors and matrices. A good solution to your need will depend on...

circa 2 mesi ago | 0

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Answered
Simulink signal mean without zeros
Two key ideas. Use unit delay block to hold calculated values so far Use conditional logic to control when math does or does n...

circa 2 mesi ago | 0

Answered
How to pass a string dialog (masked) parameter to TLC file for a Level-2 MATLAB S-function?
See this doc page. https://www.mathworks.com/help/simulink/sfg/writertw.html and in this example edit('adapt_lms.m'); search...

circa 2 mesi ago | 0

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Answered
Is it possible that the "m. file" code is converted from the double precision to the single precision??
Hi, The tools for converting double precision floating-point to single precision for MATLAB code and Simulink models work best ...

circa 2 mesi ago | 0

Answered
(Need Help) Is There Any Single-Precision Optimization Code?
I'm not sure if there is support for single-precision simulation and code generation of the kind of standalone optimization solv...

circa 2 mesi ago | 0

Answered
Simulink model: Invalid data type for root level port
I suspect your inport "REEC" is not explicitly specifying its data type and is inheriting data type single via Simulink underspe...

2 mesi ago | 1

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Answered
How to get Tabledata and break point values using command line for look up table
First, get an array of block paths by searching on 'BlockType', 'Lookup_n-D'. Second, iterate over each block in that list to e...

3 mesi ago | 0

Answered
How do I input a tranfer function in simulink with just a numerator?
The Laplace operator s represents a derivative and its inverse (1/s) represents an integrator. In concept, you could model 3*s ...

3 mesi ago | 0

Answered
Make matlab use single as standard for code generation
Embedded Coder is designed to keep the generated code consistent with a Simulink model's simulation behavior. Changing doubles t...

3 mesi ago | 0

Answered
What is the real value of "single(my_variable)"?
Decimal text rounds to nearest representable value When decimal text is read in and parsed by MATLAB, a C compiler, your own cu...

4 mesi ago | 0

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Answered
Simulink block to get the specified value
You need your design to remember the past value of a signal, so your design will need some lasting memory. Lasting memory is als...

5 mesi ago | 0

Answered
How to set an input/output data type based block mask parameters?
One way to achieve this is to use the Mask Initialization code to create a dummy "value holder variable" of the same type specif...

5 mesi ago | 1

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Answered
Simulation for custom multiprocessor hardware
Yes, a strength of Simulink is allowing all manner of different things to be brought together in a system level simulation. Thi...

5 mesi ago | 0

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Answered
Use variable with number of bits for entiere and fractional part
Hi Mathieu, As Walter mentioned, Fixed-Point Designer provides fixed-point support for MATLAB, Simulink, Stateflow, Embedded Co...

6 mesi ago | 3

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Answered
Why does C code generated from Stateflow logic with 'duration' operator have conversion to real_T (double) in it?
Tunable Pararmeters with Duration appears to be a Limitation for Singles only designs In the model above, tuneParam1, tunePar...

6 mesi ago | 1

Answered
Mux signals do not affect simulation or code generation. But when Code is generated using Mux Block then Arrays are getting generated. Please explain
The mux block is not changing the values. In that sense, "Mux signals do not affect simulation or code generation." But, as the...

6 mesi ago | 0

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Answered
Stateflow model file dependencies issue.
Hi 1) You can proceed with the rest of the Fixed-Point Tool conversion workflow. A restore point only impacts how you can aba...

6 mesi ago | 0

Answered
Machine precision in simulink
To determine what is happening, a good approach is to log the key signals involved. Then use MATLAB to investigate the logged v...

7 mesi ago | 0

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Answered
Why is type conversion int32_t to uint32_t a Sign Change Integer Conversion Overflow Defect in Polyspace?
First, two suggestions Here are two suggestions that can improve the efficiency of your generated code and may make the analysi...

7 mesi ago | 0

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Answered
Matlab Code for IQ Samples Compression and Decompression based on Block Floating point
I'll describe some concepts that will hopefully help you figure out the code needed for your specific case. I'm assuming the in...

7 mesi ago | 1

Answered
What is the equivalent of Discrete Filter bloc in a matlab code ?
dsp.IIRFilter dsp.FIRFilter filter

7 mesi ago | 1

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Answered
Why do the data become zero when using the function fi?
It's just like scientific notation is the short answer to "Why FractionLength can be bigger than WordLength?". The long answe...

7 mesi ago | 0

Answered
How can you get a mathmatical function from a simulink plot?
Finding a model or function is a very broad field. Depending on the nature of the problem and requirements, many tools and tech...

8 mesi ago | 0

Answered
Simulink Fixed point to Floating Conversion
Notice the "(SI)" shown on the icons of the data type conversion blocks. That means the block is using the less common "Stored ...

8 mesi ago | 0

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Answered
Does anyone have any experience or success using the manually written fixed-point fft provided by Mathworks in this example?
The FFT provided by DSP System Toolbox as MATLAB callable system object dsp.FFT or as the FFT block should be consistent with ea...

8 mesi ago | 0

Answered
Why can't an fft function output an int data type?
MATLAB's built-in types are generally designed to favor operations producing an output of the same type as the inputs. (Key exc...

8 mesi ago | 1

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