Fangjun Jiang

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2,965 total contributions since 2011

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Professional Interests: Model-Based Development

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Answered
Delete parts of plotted figures?
use patch() or fill()? This one does part of it. patch(xp,yp,'white')

9 hours ago | 0

Answered
Programming Problem on code
t1 doesn't contain t=0.2 and t=0.6. Not sure if it is correct or there is a typo. You can do repmat(y,1,10) or as many times as...

9 hours ago | 0

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Matrix input/output to a Matlab function block in simulink
Use a Constant block, specify the value as the variable in the base workspace, then you will be able to use it, no matter what i...

10 hours ago | 0

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How to make input values go into a matrix set?
InputStr= input(' Enter coordinate point location (x,y)','s'); Command Window: >> 2 , 4 PointA=str2num(InputStr)

2 days ago | 1

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i dont know what is this answer
The value is too big to show "real number" >> a=1000 a = 1000 >> format ShortEng >> a a = 1.0000e+003

2 days ago | 0

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Answered
block power of 3
Product block with 3 inputs Fcn block specified as "u^3"

2 days ago | 0

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How to correctly set instance parameters of model reference?
In the referenced model, you need to create workspace variables, set 'ParameterArgumentNames' first as described in the document...

3 days ago | 1

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How to extract matrix with different starting index for each row?
%% Orig=transpose(reshape(1:20,5,[])) StartPos=[2;1;3;2]; Wid=3; row=repmat((1:size(Orig,1))',1,Wid); col=StartPos+(0:Wid...

3 days ago | 1

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Answered
Error while running Cyclomatic complexity check
Press Ctrl+D to update the mode, or better, run a simulation first to make sure your model has no errors first.

3 days ago | 0

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help on simulink input
You don't remove the Constant block. You "Connect" the Slider to the Constant block. Double click the Slider, Drag the Constant...

3 days ago | 0

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Answered
Use Simulation Time of Simulink in Matlab function when threshold is exceeded
Use Step block to specify time and value. This is your threshhold. Use Comparator block to compare your incoming signal with t...

3 days ago | 0

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Round a signal in simulink?
'simulink/Discontinuities/Quantizer'

3 days ago | 0

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Rate Transition in If-action Subsystems
Let's say your whole model is executed at every 0.1s. At every 0.1 second, the condition is checked and the "If-action" subsyste...

3 days ago | 1

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Answered
How to get Simulation Status correctly?
Use set_param('vdp','SimulationCommand','continue') to change the simulation status, other options are 'start', 'pause','stop'. ...

4 days ago | 0

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Plot not showing line fully
Might it contain nan? plot([1:3,nan,nan,4:6])

4 days ago | 0

Answered
Problem with conection port/ input port in subsystem
Most likely, you need this "Physical Signal to Simulink Signal Convert" block. https://www.mathworks.com/help/releases/R2020b/p...

4 days ago | 0

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Dot indexing is not supported for variables of this type when trying to write value into static text box
set(hObject, 'String', num2str(value)) see this comment ? % hObject handle to edit1 (see GCBO) % handles empty - ha...

7 days ago | 0

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Lookup value in one array based on interpolated point in another?
interp1() in MATLAB "1-D Lookup Table" block in Simulink.

7 days ago | 0

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Answered
How can two people work at the same time at a code
This is a typical source control issue. Take a look at GitHub.com. There is free version available. MATLAB supports Git.

7 days ago | 1

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how to get keyboard in matlab
use function input()?

9 days ago | 0

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simulink models with iPad
Would MATLAB Online be a solution?

10 days ago | 0

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How to find each model uses given block?
You will need to go through a loop, open or load each model, find if particular block exists and then close the model. open_sys...

10 days ago | 0

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How to divide an array into sperate vectors.
use reshape() to transform it to 4x250 or 250x4 then loop through row or column

10 days ago | 0

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Answered
simulink not updating scope
It might be a visual misconception, e.g. the simulation runs too fast for eyes to catch. Change the simulation stop time to be '...

11 days ago | 0

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Simulink-Blockmask: How to add a button and assign a callback by m-file script?
To get mask parameters get_param(gcb,'MaskNames'), or 'MaskVariables','MaskPropertyNameString',... To do mask programmatically...

11 days ago | 0

Answered
'Decimation' Error in Simulink
Follow the link of the error message to find the involved block. You must have provied an incorrect number for the "Decimation" ...

11 days ago | 0

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Answered
Referenced Data Dictionaries and Hierarchical Models
You are over-thinking and making it overly complicated. There is no hierarchy for parameters. Simply create Kp1, Kp2, Kp3 or bet...

14 days ago | 0

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Answered
trying to open .fig file but an error shows
Some times, or many times, when you save a .fig file, there is also a .mat file saved for it. You need both files to be able to ...

14 days ago | 0

Answered
What are the obsessions you saw in MATLAB Answers or in MATLAB programming?
I will start with the popular ones No-looper: don't want to use for-loop One-liner: Must get the result in one line of code G...

14 days ago | 0

Question

What are the obsessions you saw in MATLAB Answers or in MATLAB programming?
Those obsessions that seem to persist but not necessarly good.

14 days ago | 3 answers | 0