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Andy Bartlett

MathWorks

Last seen: Today Active since 2015

Andy leads the Fixed-Point Designer development team.

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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 5 ore 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 5 ore 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...

19 giorni ago | 1

| accepted

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...

circa un mese 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 ...

circa un mese 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...

circa 2 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...

3 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...

3 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...

3 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...

3 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...

4 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...

4 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...

4 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...

4 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...

5 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...

5 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...

5 mesi ago | 1

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

5 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...

5 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...

6 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 ...

6 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...

6 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...

6 mesi ago | 1

Answered
Why can't complex integer arithmetic be done?
The integers provided in base MATLAB were design to support image processing use cases. Integer types are also a special case o...

6 mesi ago | 1

Answered
Is there a fixed-point alternative to the fft and ifft fiunction?
The FFT provided by DSP System Toolbox as MATLAB callable system object dsp.FFT or as the FFT block support fixed-point data typ...

6 mesi ago | 1

Answered
reduce the working precision
I'm guessing you want your simulation code to be smaller and faster. Single precision floating-point provides around 7 decimal ...

6 mesi ago | 0

Answered
How to fix error in port widths or dimentions on the reshape block input?
The purpose of Simulink's Reshape block and MATLAB's reshape command is only to "reinterpret" the dimensions (aka size) of the s...

7 mesi ago | 0

| accepted

Answered
Counter for Sawtooth signal in Simulink
The icon shows the Z-domain description of the Integrator block in accumulator mode (noting that K = 1) Y(z) = ( z / (...

7 mesi ago | 0

Answered
How can I use fractional data types when the values are beyond the interval [-1, +1) ?
I recommend against trying to force a design to use fractional types. Using general fixed-point scaling instead of limiting only...

7 mesi ago | 0

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Answered
simulink fixed point advisor example file
The model used in Harhita's Webinar is attached along with a script to define an input object to trigger both of the model's sim...

7 mesi ago | 0

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