Fangjun Jiang

Last seen: Today | 自 2011 起处于活动状态

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

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MATLAB
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English
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Create an array of distinct objects of handle class
As long as uilable() can only create a single object, there is no way to avoid the loop. In arrDir(1:2) = uilabel, the same sin...

3 hours 前 | 0

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plot the function which is dependent on x, y and z with x, y and z on three axis.
You are asking for the impossible, the visualization of the 4th dimension. I thought it was impossible in three dimentional wo...

1 day 前 | 0

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Simulink source commands finding
Use the Signal Editor block https://www.mathworks.com/help/simulink/slref/signaleditorblock.html or in older version, it is ca...

2 days 前 | 0

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Simulink: Mask parameter fails to bind to block port
It is more involved for this task. I hope the attached model (in R2022b) make it easier. In your model, the two inports are cal...

3 days 前 | 0

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已回答
Stop Simulink Model Update via Callback
Instead of sldiagviewer.reportError(errMsg), if you do error(errMsg), it should stop.

4 days 前 | 0

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已回答
Reset value of Ramp block to be used in Matlab Fctn block
I think it is possible. Use the "State Writer" block. But using the "Integrator" block would be easier. Enable its external res...

4 days 前 | 0

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How to write overline on top of a word in title of a plot?
title(["Some text $\bar{XX}/V$","Some other text"], 'Interpreter', 'LaTeX')

4 days 前 | 1

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已回答
Hi, i want to plot two columns of values of data from excel, the graph includes a zero while the excel sheet doesn't. Here is my code and the graph I got vs what I should get
I think the last data point (un-wanted) is at (0,0). Your data shows it. You can look at the value of q and D_q.

4 days 前 | 0

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IF statement if == "A variable" not working
Most likely it is a floating point data equal comparison problem. b is somewhere near 9999 but not exactly. Use round() or integ...

5 days 前 | 0

已回答
array operations in app designer
Need to specify the .Value property? If not, just pause the code and check its value, app.uhly_array and app.theta1 app.delta1....

5 days 前 | 0

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已回答
Simulink Discrete Filter Sample Time
See the note on this page. To set it in command line set_param('BlockPath','SampleTime','0.1') https://www.mathworks.com/help...

5 days 前 | 1

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"Unrecognized method, property, or field 'Type' for class 'matlab.ui.control.WebComponent'."
I think app.tabFiles.Children is an array of handles. Try tf = strcmp(get(app.tabFiles.Children,'Type'), 'uistatebutton')

5 days 前 | 0

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已回答
The code is correct, however I keep getting this error: Invalid color, marker, or line style.
See the possible marker symbol and line symbol help plot Various line types, plot symbols and colors may be obtained with P...

7 days 前 | 0

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'Could not determine the size of this expression' in simulink function block
In general, it is better to specify the size (number of rows and columns) of all the inputs, outputs and parameters that are use...

7 days 前 | 0

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已回答
variable duty ratio to a switch at different time intervals
I assume this is in Simulink. You can use an AND logic block or Product block to multiply two signals. One is the regular 40% du...

7 days 前 | 0

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已回答
How to use Workspace Variable value instead Sldd value in Simulink model.
Check the "Enable model access to base workspace" at Model Property, External Data tab? https://www.mathworks.com/help/simulink...

7 days 前 | 0

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Is there a nice way to discretely simulate an LTI system using a function block in Simulink?
Yes. For sys = ss(A,B,C,D,ts), the following equation should be used to advance the simulation step by step. Make sure to use c2...

8 days 前 | 0

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已回答
How can I solve this error??
There is nothing wrong in these commands. The simulation was being started but there is problem in your scenaio. Switch to the...

9 days 前 | 0

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已回答
Building an array of strings that might be empty
That is because app.XminEditField.Value and etc are char array, not string use string() s=["a","","b","c"] c=['a','','b','ded...

9 days 前 | 0

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How computationally intensive are switch case action blocks in Simulink?
Yes. More cases will not increase the computation load. Only the activated cases will be executed. It is called the Condtionally...

10 days 前 | 0

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已回答
How to get variable from Simulink model workspace for use with Multiple Simulations?
I think you are looking for model parameter argument. Follow this Q&A. https://www.mathworks.com/matlabcentral/answers/2101666-...

10 days 前 | 0

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How to fix this error? : Error:Index exceeds the number of array elements. Index must not exceed 4.
All the Winding parameters need to have 5 elements (including both the left and right side). You have only 4.

10 days 前 | 0

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Is it possible to use a parameter within the "To Workspace" block?
I remember answering the same question before. The answer is "No" by value passing, but you could do it using set_param(). For ...

10 days 前 | 0

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Any good resources on how to use "Matrix Interpolation" block in simulink?
What you need is the "2-D Lookup Table" block. Drag that from the library and select "Nearest" at the "Algorithm" tab. The Help ...

10 days 前 | 0

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已回答
In GUI, RangeSlider 's Value may have a wrong type
No confusion. You will find X = app. FilterHzSlider.Value; X is returned as [50 1000]. So you would do minFrq=X(1); maxFrq...

11 days 前 | 1

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Function call failed when calling matlab function inside function block
Okay, fg_chua() is generated by matlabFunction(). You need to specify the size of ux in the MATLAB Function block. Open the MAT...

11 days 前 | 0

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已回答
How to change the parameter value at run time in Matlab Simulink
This is not "change the parameter value at run time". Rather, it is to mimic a dynamic signal. You can use many of the blocks in...

11 days 前 | 0

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Loading table from object from .mat file
If the table object in that .mat file is called MyTable, then after ParaDat=load('ParameterDatabase.mat'), you can access it by ...

13 days 前 | 1

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已回答
How to create a string array and access the elements without throwing "COMMAND must be a string scalar or character vector" error?
This error might be particular to the GBMD.loadDumpFile(). Can you try either one of these Make a temp variable, such as tempVa...

13 days 前 | 1

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已回答
change the value of a data structure field
s(3).Val='1'; s.Val [s.Val]=deal('2') s.Val

13 days 前 | 0

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