Fangjun Jiang

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2.721 total contributions since 2011

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

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Answered
Parameter values for variant subsystem
All the parameters for the linear controller and non-linear controller need to be provided (could be in base workspce, or model ...

ein Tag ago | 0

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How run Simulink model automatically from itself if a condition is met?
Try it in PostSaveFcn, or have an independent and separate M-script to control your simulation.

ein Tag ago | 1

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How to access WLAN toolbox since it doesn't show up?
WLAN Toolbox is a toolbox under the "application products", not under the "Simulink" catagory. I have the toolgox but don't see ...

2 Tage ago | 0

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For loop for function values
Don't create variables R1, R2, ... R5. Instead, create array R, use R(1), R(2), ... R(5). Then you can run your for-loop.

2 Tage ago | 1

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Is there a way to open the on-screen keyboard in Windows from Matlab?
winopen('C:\WINDOWS\system32\osk.exe')

2 Tage ago | 0

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cannot find a help folder
You probably don't have the Communications Toolbox installed. run "ver comm"

2 Tage ago | 0

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error message Conversion to logical from matlab.graphics.GraphicsPlaceholder is not possible
replace "while findobj(0,'Type','figure','Name',figName)" with "while isempty(findobj(0,'Type','figure','Name',figName))"

2 Tage ago | 0

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PROBLEM WITH LOOKUP TABLE
You must have been trying to do that in a Simulink Library file, not a Simulink model file. If you really want to customize this...

2 Tage ago | 0

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Howto replace Element with Element from another Vector at the 1st Element's Position
A=10:10:100; B=[3,10,nan,2,nan]; index=~isnan(B); B(index)=A(B(index)) B = 30 100 NaN 20 NaN

2 Tage ago | 0

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Simulate continous model at predetermined time (Simulink)
If you can't really make the two sets of data have the same time samples, then you can utilize resample().

3 Tage ago | 0

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Saving data at the end of a simulation to use it at the beginning of another simulation
Ctrl+E to open configuration parameters, Data Import/Export, un-check "Single simulation out" will save the "To Workspace" to "P...

3 Tage ago | 1

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Disabled a button with Simulink
Try this. Put all those blocks inside an Enabled Subsystem. Use your logic to Enable/Disable the subsystem.

3 Tage ago | 0

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Using the first value of a variable during simulation in Simulink
If the triggered subsystem is truly ran only once, then you don't need to do anything. The output value of this block is "held"....

4 Tage ago | 0

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Error using matlab.ui.control.EditField/set.Value 'Value' must be a character vector or a string scalar.
The value for "app.BeginningEditField.Value" needs to be a character vector or string scalr. datetime() returns an object of the...

4 Tage ago | 0

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Answered
How to retrieve the location of the points plotted ordered
If you run plot(x,y) instead of plot(x,y,'o'), you will see the correct curve. So your data is already "sorted" as you wanted. I...

4 Tage ago | 1

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Is there a way to programmatically display documentation pages for the methods of the Simulink.SimulationInput class rather than the page for class?
Use web() instead of doc() web(fullfile(docroot, 'simulink/slref/setpostsimfcn.html')) web(fullfile(docroot, 'simulink/slref/s...

5 Tage ago | 0

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Throw an error when more than one result is returned
use files=dir('*data.csv'); size(files)

5 Tage ago | 0

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Duty cycle Matlab funciton is Simulink. Error! -Undefined function or variable 'duty_cycle'. The first assignment to a local variable determines its class.
Two comments. Feed the "duty_cycle" to a "unit delay" block and then connect it to "past_duty". The first line inside your MAT...

5 Tage ago | 1

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Answered
Enable and Disable input/output subsystem's ports in Simulink
Variant Subsystem now supports various number of Inports and Outports of its variants. You can do it using the Variant Subsystem...

5 Tage ago | 0

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If Action Block that create a stairstep signal in simulink
The "sample time" of the Constant block might have been set as "1" second.

5 Tage ago | 0

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what this matlab syntax var1= input.var2 corresponds to ?
It is called struct. Follow the link to see the document and you can try youself. input.var2=2; input.var3=rand(3); MyVar=inp...

8 Tage ago | 0

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Simulink Model Export as Video
If you have Windows 10, you can use the built-in capability with Windows Game Bar. Google "How to Capture Video Clips in Windows...

8 Tage ago | 0

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Apply function with multiple input variables to table entry
function_handle might be what you need.

8 Tage ago | 0

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In a single line, create a handle to the " +" function.
h=@plus; h(1,2)

9 Tage ago | 2

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How to choose a random coordinate (location like i,j) in a matrix
[m,n]=size(A); i=randi([1 m]); j=randi([1 n])

9 Tage ago | 0

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Stripping outputs from dir function
fileList = dir('*.png')

9 Tage ago | 0

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matlab space error problem
From "help strcat" For character array inputs, strcat removes trailing ASCII white-space characters: space, tab, verti...

9 Tage ago | 0

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Sizing in subplot()
subplot(3,2,x) gives you 3 rows and 2 columns thus 6 subplots. x can be 1,2,...6

9 Tage ago | 0

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Answered
How to recall a figure which was generated by a name "fname = figure; figure(fname)" without saving it ?
When you run fpressure=figure, it creates the figure object handle fpressure. But after you clear the workspace, the figure obje...

9 Tage ago | 0

Answered
Increasing value of each row from matrix A to create Matrix B, then replace 21 into 1 while the rest into 0 to create Matrix C
B=A+(1:31); index=B==21; B(index)=1; B(~index)=0

9 Tage ago | 0