Fangjun Jiang
What is a model?
Professional Interests: Model-Based Development
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Content Feed
How to select consecutive rows at regular intervals?
index1=[repmat(false,20,1);repmat(true,30,1)]; index2=repmat(index1,20,1); A=rand(1000,3); B=A(index2,:)
5 days ago | 0
Simulink fixed-step size protected variable name
If you set the fixed step size to be a particular value, you can get the value using the following command get_param('ModelName...
6 days ago | 0
How to use user defined .mat file with multiple datatypes as input to simulink function block?
Use From File block
6 days ago | 1
repeat an array (a signal) over a specific period
new_phi=repmat(phi,1,200)
6 days ago | 0
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MATLAB certification/verification/validation
Not for MATLAB, but for certain Simulink products. https://www.mathworks.com/products/do-178.html#qualifying-tools https://www...
6 days ago | 0
Update subsystem's Block parameters for all the subsytems in a model.
h=find_system('ModelName','FindAll','on','BlockType','SubSystem') set(h,'TreatAsAtomicUnit','On') You might need to refine you...
12 days ago | 0
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Turn off Content Preview Enabled when creating a subsystem in simulink
When you add the Subsystem block, it is empty (no contents). I guess maybe due to that, 'ContentPreviewEnabled' can't be set as ...
14 days ago | 0
Changing plot colors directly in .fig files
Use findobj() to find the line, set the color to be [Red Green Blue] >> b=findobj(a,'type','line') b = Line with properties:...
15 days ago | 1
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License info missing in license function - How to see which licenses I have checked out?
"ver" returns the toolboxes "installed" on your computer. You could run Info=license('inuse'). Check each Info(1), Info(2) to s...
16 days ago | 0
comment out many SubSystems in my Model in Simulink using for loop.
num2str()
16 days ago | 1
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Error while saving Simulink model
run "dbstop if error" in MATLAB Command Window first and then save, see if you can get any lead where the error occured.
18 days ago | 0
Creating a logic vector out of 2D matrix
M(i,i) == M(i,0) should be M(i,2) == 0 When you have this type of error on a very simple script, put a break point and run th...
22 days ago | 0
How do I map a model simulink version obtatained with Simulink.MDLInfo('mymodel') to a MATLAB version (e.g. R2021b)
It looks like Simulink.MDLInfo() will give you 'ReleaseName'. I am running this in R2018b on an example model 'f14' and an old m...
22 days ago | 0
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Erase this character ''←''
double('←') strrep({'←Matlab←←'},char(8592),'') strrep({'←Matlab←←'},'←','')
24 days ago | 0
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Name of Bus at input or output port of a block
"Inbus" and "Inbus2" here are the tag names of the "From" block. They have nothing to do with the bus name, of curse except that...
26 days ago | 0
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Open a masked subsystem (look under mask) in command line
open_system(blk,'force') looks under the mask of a masked block or subsystem. It opens the dialog box of the block under the mas...
28 days ago | 0
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How to code a time delay specified by a value saved in a parameter structure in a Matlab block?
In the MATLAB Function block editor, click the "edit data" button, then add parameter. Define the "myParams" in base workspace a...
1 month ago | 0
Creating a Simulink model using command Lines
The property name for Capacitance is 'c' set(gcbh,'c','1e-5')
1 month ago | 1
Matlab signal propagation error
Here is the root cause. It is due to the difference between R2020b and earlier versions. You have to figure out how to deal with...
1 month ago | 0
Where is Switch (Relay) in Simulink?
https://www.mathworks.com/help/physmod/sps/ref/spdtrelay.html?s_tid=doc_ta https://www.mathworks.com/help/simulink/slref/manual...
1 month ago | 0
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How do you quickly format plots from the scope in Simulink?
Instead of using Scope, save the signal data using "To Workspace" or "To File" block. Write a M-script function to plot. see pl...
1 month ago | 0
MATLAB Puts One space between %'s (Comment)
I think that is the exact reason to add "%" and a space for "Ctrl+R", to avoid making "%%" by pressing "Ctrl+R" twice. Adding "...
1 month ago | 0
issue with using a variable for path name
cd(Path). avoid using 'Path' as variable name as path() is a function.
1 month ago | 0
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How to get current URL from web browser using matlab?
If you are willing to do copy&paste, you can do this in MATLAB txt=clipboard('paste')
1 month ago | 0
Libraries equivalent for referenced subsystems
The library option in find_system() 'FollowLinks', 'on' or 'off' Also 'LookInsideSubsystemReference', 'on' or 'off' See doc ...
1 month ago | 0
Road Roughness in simulink
It seems normal to me. The acceleration has positives and nagatives, thus the speed shows rising and falling, but because all th...
1 month ago | 0
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How to change port font color in Matlab Function Block in Simulink
It looks like block mask. Select the block, press Ctrl+M, check the "icon drawing commands".
1 month ago | 0
cannot extract data from figure with multiple lines
The other two "curves" are created using stairs(). use findobj(fig,'Type','Stair') to find those. fig = openfig('traj.fig'); >...
1 month ago | 0
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