Fangjun Jiang

Last seen: Today | Active since 2011

What is a model? Professional Interests: Model-Based Development

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Parameters of FunctionCall block in Simulink
Click "Help" to bring up the document. It is there. get_param(gcb,'FunctionPrototype') 'InputArgumentSpecifications' 'OutputA...

ongeveer 3 uur ago | 0

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Want to iterate over subfolders within folder
Files=dir('**/*.xlsx') will give you a list of all the .xlsx files in the folder and sub-folder. Observe Files(1), Files(2), .....

1 dag ago | 0

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Is it possible to control where the ADC samples within a period? MATLAB Simulink C2000 F28379D
Not too many people noticed this. In the case of a discrete sample time, the vector is [Ts, To] where Ts is the sampling perio...

1 dag ago | 0

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Why can't the index variable of a for loop be stored in a structure or other array?
There is no mention of any requirement on the name of the index varialbe, here in the document for "for", https://www.mathwork...

1 dag ago | 0

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How to obtain a vector (A) of 11 rows (output MATLAB Function block), from a vector (B) of 501 rows (input to the MATLAB Function block)?.
The straight solution is to use below. function y=f(A,B) temp=sqrt((A).^2+(B).^2); y=temp(1:49:450); Simulink is strict on k...

2 dagen ago | 0

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Using Try/For loop to allocate correct serial port number
See help document for "break" and "continue" for k=1:100 port=sprintf('COM%d',k); try ND280 = serialport(por...

2 dagen ago | 0

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How to fetch the documentation content of a Doc block?
See this Answer. https://www.mathworks.com/matlabcentral/answers/521695-my-docblock-data-doesn-t-update-programmatically

2 dagen ago | 0

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update a parameter in function block each timestep in simulink
Use the "Ramp" block to generate such a signal.

8 dagen ago | 0

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Simulink, simout problem
The error is from the Simulink model itself. It can't determine the size of certain signals, most likely from the MATLAB Functio...

9 dagen ago | 0

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Error evaluating 'InitFcn' callback of block_diagram 'SIMULINK_MODEL'. Callback string is 'MATLAB_MODEL' Caused by: Error using MATLAB_MODEL
Most likely, it is looking for a file named "MATLAB_MODEL_v20180919.m". Search for that file and check if the folder is in your ...

11 dagen ago | 0

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Simulink: changing gain based on input
For this, it sounds like you just need a Gain block. Set the gain value to be 255/pi, when the input is 0, the output is 0. When...

11 dagen ago | 0

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I want to correct this command please
The three equations form a non-linear ODE with three independent variables (x,y,z). Because they are coupled, you can't solve th...

14 dagen ago | 1

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Why can I break Simulink library links by right-clicking in the model, but can't programmatically?
"Implicit" means Block resides in library block and is itself not a link to a library block. Suppose that A is a link to a subsy...

14 dagen ago | 0

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Extracting values from a string - Matlab
You got string array (" ") and char array( ' ') mixed. See which data format fits you better. ind = "i 1 1" ind(1) ind2=char(...

14 dagen ago | 0

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How to log signal data from simulink to matlab with higher time interval to avoid high data storage?
Set the "Decimate data" to be 300. It means log every 300th data. It may not guarantee 0.3 second if using variable step size so...

15 dagen ago | 1

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Find maximum value in a column of each cell in a large set of cell array?
c={rand(10),rand(11),rand(12)}; N=5; cellfun(@(M) max(M(:,N)),c)

16 dagen ago | 0

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I would like to convert data of double type to single type before code generation in 2020A Simulink, without using Cast blocks on most functions.
See this example Validate a Single-Precision Model

17 dagen ago | 0

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Answered
Unable to use the variable from workspace which is sent to the MATLAB workspace using 'To workspace' block of the Simulink.
"Unable to read file 'IEEE_14_Bus_System_SM_FFR.mat'. No such file or directory." Make sure you have that .mat file. Use Comman...

17 dagen ago | 0

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Answered
Returning output signals from a Simulink block to Matlab
Access Data in a MATLAB Function During Simulation

18 dagen ago | 0

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Does anyone know how I can connect a matlab function block with memory block and a controlled current source?
See this How to Use Globals with the MATLAB Function Block

18 dagen ago | 0

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Modify In/Output Port names with a MATLAB script
Something like this: [~,~,InPortNames]=xlsread('ExcelFileName'); % read Excel file to get PortNames as a cell array InPorts=fi...

21 dagen ago | 0

Answered
Dynamic Modeling of Wheel-track Composite Vehicle
Vehicle Dynamics Blockset has dual track model as well as wheel/tire dynamics. Not sure if this meets your need or whether you h...

22 dagen ago | 0

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Is it possible to convert a referenced Configset to a regular Configset that is not referenced from an sldd?
copy, attach and setActive. similar to the example here? https://www.mathworks.com/help/simulink/slref/simulink.configsetref.ht...

23 dagen ago | 0

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I noticed that some GoTo and From signals (input port no. 1) are not connected properly after the transfer (from one system to another system) of the model.
The number on top of the line indicates the size of the signal. "1" means a scalar. "2" means 1x2 or 2x1 vector. "?" means it ca...

23 dagen ago | 0

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Answered
How to achieve fan rpm with increasing step size?
The "step" increase you saw is probably determined by your lookup data and simulation step size. What you really need is proba...

24 dagen ago | 0

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Answered
Does anyone know which Simulink Block this is?
It looks like the "Fcn" block specified as "u(1)". It is used to pick out the first element. https://www.mathworks.com/help/re...

25 dagen ago | 1

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Answered
How to skip an empty value
You can use isempty(rp) to check, and then ignore as needed.

25 dagen ago | 0

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Answered
Unpack structure, only some fields
make use of fieldnames()? Avoid using the unpack() name. There is a built-in function with the same name. par.a=3.5; par.b=[4...

25 dagen ago | 0

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Element wise (.*) in Simulink for two matrices with different dimensions
a=[1 2 3; 4 5 6]; b=[1; 0]; a.*b This is a change made in MATLAB in R2016b when implicit expansion is introduced. Prior to R2...

25 dagen ago | 0

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Is it possible to change a parameter in a Simulink model each time it is run via a for loop in a MATLAB script?
Yes. Run Simulations Programmatically sim()

25 dagen ago | 0

Fangjun Jiang

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