Fangjun Jiang

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3,163 total contributions since 2011

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Answered
draw 30 cycles of sinusoid oscillating at 10^6 hz
change to this line tt=0:T/100:30*T

16 minutes ago | 0

Answered
Different (Simulink) simulation results when called from App designer than a matlab script (.m)
This happened several times now and it might be related. Give a return variable when you call sim() such as Result=sim(...). Ot...

4 days ago | 0

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How to use external function(m file) in a Simulink?
Interpreted MATLAB Function

6 days ago | 0

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Answered
Set certain value of signal when it goes above threshold.
Use the Relational Operator block to compare the signal against the threshhold value. The output is a true or false signal. Use ...

9 days ago | 0

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One of the Mask Parameters getting reset in Entire Model while saving Custom Library.
Things like this usually gets complicated when it is put in a library. Without the actual model, I could guess: If you are set...

10 days ago | 0

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Answered
Deleting every n rows in matrix
A=1:100 A=A(1:15:end)

10 days ago | 0

Answered
Calling out array from workspace in simulink
You have "Var=1:5" in MATLAB base workspace. In Simulink, use a Constant block, specify its value as "Var", or "Var(1)", "Var(5)...

10 days ago | 0

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Answered
How to create constant(!) input-dependent matrices with a Matlab function block without that variable-size stuff
MATLAB Function block can deal with variable size. It is just a lot of annoynance like you suggested. You need to declare the ma...

10 days ago | 0

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How to achieve identical timing of two side by side annotations
What you can do is this. I think it can improve the timing. h1=annotation(..., 'visible','off'): h2=annotation(..., 'visible',...

14 days ago | 0

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Architectural documentation of simulink model - UML
System Composer is supposed to do this. It uses SysML.

14 days ago | 0

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Answered
How can I strip duplicates?
If you want remove duplicates only based on values in the first column Do not want the returned values be sorted then you nee...

14 days ago | 0

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How can I swap two elements in each row of a matrix without loops?
This is lengthy but does the job. %% flag=logical([0 0 1 1]); % pick two elements in each row p=perms(flag); % all the possib...

15 days ago | 0

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Answered
Mysterious tangent line on my plots
Your code has problem. If you have "clear all" at the begining to clear the variables in the memory, then your code has error. ...

15 days ago | 0

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Answered
Rearrangement of vector elements
something like this? a=(1:95)' b=reshape(a,19,[]) c=b(1:11,:) d=c(:)

15 days ago | 1

Answered
How to create a string array with long strings that continue to a new line?
s=["aa"+ ... "aa", "bb"+ ... "bb"] s = 1×2 string array "aaaa" "bbbb"

15 days ago | 2

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where is function block parameters:fcn that expression ex) sin(u(1))+cos(u(1))
I heard it was being phased out. I don't remember which version. You probably can search it in release note. It will be not ava...

16 days ago | 0

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How to make state-space model for an array input in Simulink?
You should not duplicate the State Space block. The size of A, B, C and D should all match properly to the number of states X, t...

18 days ago | 0

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Why Matlab and Simulink have different Plot for the same modulo function?
The step size is more important than solver in this case. Reducing the step size to be 1 or 0.5 and making it fixed would resolv...

22 days ago | 1

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Answered
Why do i receive this error when lunching simulink ?
The \slprj folder can't be created under "C:\Program Files\MATLAB". Move your models and work in other folder such as \MyDocumen...

24 days ago | 0

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How to put variable name in Y-limits of a scope in Simulink programmatically from Matlab
Seems true but also, it works this way. >> YY=5 YY = 5 >> set(gcbh,'ActiveDisplayYMaximum','YY') >> get(gcbh,'ActiveDi...

24 days ago | 0

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Answered
zpk function is missing
I believe zpk() requires Control System Toolbox. Check to see if you have it ver control

25 days ago | 0

Answered
storing matrix elements in a single variable as string
Use for-loop if want to split A = [3 25 100 5 20 100]; >> B=sprintf("%d#%d@%d\n",A(:)) B = "3#25@100 5#20@100 ...

25 days ago | 0

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Answered
finding the index of an array in cell array
arr ={[1,2,3],[4,45,6]}; >> index=find(cellfun(@(x) all(x==[1 2 3]),arr)) index = 1

25 days ago | 0

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Answered
How to add the "Plottools" icon to plot control ribbon.
On the figure, click menu "View", check "Figure toolbar" or "Plot Edit Toolbar" or others.

28 days ago | 0

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Answered
How do i fix return error in matlab?
This is a warning, not an error. If the code "return" here (which means exiting the function), the varialbe "rho" may never be ...

28 days ago | 0

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Convert from R2019b to R2019a
Open the model, click menu "File" then "Export model to"

28 days ago | 0

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Unable to use curly braces to index into cell
Where is your variable "cell" defined? cell() is a function. Use some other name.

28 days ago | 0

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Open figure in new window instead of next to editor using figure object
%% close all; f=figure('Name', 'FFT-Test','position',[150,0,1000,650]) f1=subplot(4,1,1,'Parent',f) plot(1:10) f4=subpl...

29 days ago | 0

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Answered
Continue, step in , step out are disabled after error in program
run "dbstop if error" and then run your porgram and debug run "dbclear if error" to go back to normal

30 days ago | 0

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Answered
Summing two binary vectors
%% a = [1 0 1]; b = [1 1 0]; s=dec2bin(bin2dec(num2str(a))+bin2dec(num2str(b))) out=str2num(s(:)) out = 1 0...

1 month ago | 0

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