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Fangjun Jiang


Last seen: Today Con actividad desde 2011

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

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Respondida
Force default datatype to single in undefined Simulink blocks
'DefaultUnderspecifiedDataType' is not the same as 'Default DataType'. Your setting only applies to the Constant block because i...

alrededor de 9 horas hace | 0

Respondida
How do I get the relative error between 2 signals in Simulink?
Assume x and y are the two signals, you are doing abs((x-y)/x) or abs((x-y)/y), when x or y is close to zero, it will cause di...

alrededor de 10 horas hace | 1

Respondida
Tally Instances of Negative Numbers in an Array (for loop)
A=load() returns A as a structure, not a typical matrix. If you make A an matrix, this code would work if you make the following...

2 días hace | 0

Respondida
isnan to conver nan to zero in a table
T is an object of the class "table". You can't apply isnan() on it directly. Try the 'TreatAsMissing' option of the readtable() ...

2 días hace | 0

Respondida
Is there a way to extract a list from "PV Array.ModuleName.Enum" to view the solar module data more efficiently?
Should be BlockDialogParameters.ModuleName.Enum or getfield(BlockDialogParameters.ModuleName,'Enum')

2 días hace | 0

Respondida
Plot RGB triplets from a matrix as markers 'o'
Use 'color' to specify color in plot() x = linspace(0,10,10); y = linspace(0,10,10); xlabel('X-axis'); ylabel('Y-axis'); ax...

5 días hace | 0

Respondida
What is the max number of digits allowed for a base 2 number?
The default data type in MATLAB is "double", which means 64 bits. When used to represent a base 2 number, its maximum value is 2...

8 días hace | 0

Respondida
How to set Simulink block parameters using an absolute model path
The "absolute model path" of a block starts with the name of the model, not including the file folder where the model file is st...

13 días hace | 0

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Respondida
How to output text to Command Window if signal changes from 0 to 1 in Simulink
You might want to do that, but MATLAB and Simulink are quite different. I don't think you can do that because disp() or fprint...

19 días hace | 0

Respondida
I can't download Matlab R2022a release or earlier release
I can see many versions on this link. https://www.mathworks.com/downloads/

19 días hace | 0

Respondida
How to change const variable during simulink runtime
While the simulation is running, if you double click the Constant block, change its value from one numeric value to another (e.g...

21 días hace | 0

Respondida
Initial condition from external source for discrete integration diuring runtime
The value of "mec_init_pos" could be constant or dynamic, but in this case, only its value at the begining of the simulation (e....

26 días hace | 1

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Respondida
Function Call Trigger Problem
This "Outport" block seems to output a function call trigger. The message tells you what type of block can receive this signal. ...

26 días hace | 0

Respondida
A few basic Simulink/Simscape questions
run forever (tstop = inf) Yes. Set the simulation stop time to be inf store the trailing 10000 points Yes. Limit the data poi...

27 días hace | 0

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Respondida
How the Delay one step block and stop time ( simulation time) infuence each other on simulink?
If you don't specify the step size or it is auto, the step size is automatically adjusted, influnced by simulation stop time and...

29 días hace | 0

Respondida
Simulink model output heavily dependent on relative tolerance
Not typical but is for a stiff system. Choose a stiff solver. https://www.mathworks.com/help/matlab/math/solve-stiff-odes.html

29 días hace | 0

Respondida
Issue in creation of test harness of a Simulink state in stateflow or creation of harness of a subsystem present in simulink state of stateflow.
I don't think a "system under test" can be a "state" in a state chart. A typical "system under test" has inputs, while a "state"...

alrededor de 1 mes hace | 0

Respondida
Generate signal according to the the rising edges of two pulse generators in simulink.
A triggered subsystem shoud suffice. https://www.mathworks.com/help/simulink/slref/triggeredsubsystem.html

alrededor de 1 mes hace | 0

Respondida
Matlab & Simulink crash at 2nd model run
After first run, execute "clear mex" or "clear functions" in MATLAB Command Window to see if it makes a difference.

2 meses hace | 0

Respondida
Avoid reuse of local variables in Embedded coder
That is probably not the correct option. You should try to disable the "Reuse local block outputs" option. https://www.mathwor...

2 meses hace | 0

Respondida
Switch multiport switch inputs based on time and order from user
There are many ways to do it. The easiest or most flexible way to do it is probably by using a MATLAB Function block. Use a Cloc...

2 meses hace | 0

Respondida
Attempting to turn off Dynamic Memory allocation but struggling to set variable size upper bound
Try allocating the variable in one shot, e.g. obj=struct('x',num2cell(rand(1,1000)))

2 meses hace | 0

Respondida
Can one Function call Trigger Multiple Subsystems?
Function-Call Split https://www.mathworks.com/help/simulink/slref/functioncallsplit.html

3 meses hace | 0

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Respondida
运行s-function Output argument "sys" (and possibly others) not assigned a value in the execution with "ctrl>mdlOutputs" function.
Probably a typo at the last line of this code below. Should be 'sys', not 'sym'. Also need to add a line 'end' to finish this fu...

4 meses hace | 1

Respondida
my for loop stop after the first valid number has been found how do i fix this
Use "result_1", no need to create "answer_1" numbers=1:100; result_1=[]; for i =1:numel(numbers); num=numbers(i); i...

6 meses hace | 0

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Respondida
hi i started the matlab onramp course and im stuck on this further practice question i wld appreciate if anyone cld help me or even give an hint
density=10:10:100 index=[1 3 6] SelectedDensityValue=density(index)

6 meses hace | 0

Respondida
Questions regarding Unit Delay block initial condition and model recompilation
Use Simulink.Parameter Specify its storage class as "ImportFromFile" and specify a HeaderFile name. When the code is generated...

6 meses hace | 0

Respondida
Why am I getting a computed maximum size is not bounded error in a MATLAB Function block in Simulink R2021a even when using assert?
The Simulink diagnostic is probably not designed to read the assert() function. The proper way for this is to define those data...

6 meses hace | 0

Respondida
How do I use the unit per mille in Simulink parameters and ports?
It is "m" for "milli". "mille" means "a thousand", that is "k" for "kilo".

6 meses hace | 0

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