Community Profile

photo

Yongjian Feng

MathWorks

Last seen: Today Active since 2021

Software Engineer of Simulink Requirements team. Part time instructor of Calculus and Statistics. Experienced programmer in C/C++ and python. Mac user.

Statistics

All
  • 6 Month Streak
  • Personal Best Downloads Level 1
  • GitHub Submissions Level 3
  • 5-Star Galaxy Level 1
  • First Submission
  • Knowledgeable Level 3
  • Revival Level 3
  • First Answer
  • First Review

View badges

Content Feed

View by

Answered
How to call a function inside other function in a equation?
It depends on whether you need to use B in anywhere else. If B is only used in your function yield, you can put it in the same m...

1 day ago | 0

Answered
Sprintf problems while trying to format a directory name followed by a string
Try this: sprintf("\\Mann_Turb\\Seed_%.0f\\class4_10_seed%.0f\\class4_10_seed%.0f_v.bin", 600, 600, 600)

2 days ago | 0

Answered
Finding the last value of a difference equation
Use: y(end) = -3

2 days ago | 0

Answered
ROS required python packages
Your python installation looks good for ROS. What is the detail of the error message?

4 days ago | 0

Answered
Solve equation including parameters dependent on main variable
k shall be a symbol, once you do this before it is used, then this will take care of the dependency of delta and theta. syms k;...

5 days ago | 0

Answered
R2021b is close immediately on macos
What Mac OS are you using? Did you run any previous version of matlab on that machine before? Try to find the log file and se...

6 days ago | 0

Answered
Is applying a binary operator (+,-,*,/) to char arrays supported by MATLAB or just a "trick"
Char array is a vector of chars. So you are basically doing vector operation, right?

6 days ago | 0

Answered
Step Response of Transfer Function
Get help by doing: help tf Basically, you need to expand the denominator given in image into polynomial of s. Then take the co...

6 days ago | 0

| accepted

Answered
What is wrong in line 101?
Your file has no line 101. Only 94 lines in total. Tried some sample input data, and it works without error. What inputs are n...

6 days ago | 0

Answered
How to store graphs (undirected) i cell array and retrieve them
You meant: graphCellArray = {g1, g2, g3}; graphCellArray{1} % access the first one

6 days ago | 0

| accepted

Answered
Error using images.internal.getImageFromFile in matlab R2016a
images.internal.getImageFromFile expects the input argument to be string (the filename for the image). But it is something else....

6 days ago | 0

Answered
Using Matlab.engine and installing tensorflow at the same time
So the current hurdle is about installing/importing tensorflow, right? For the Anaconda installing issue, you might get better ...

6 days ago | 0

Answered
Unable to find explicit solution
This equation might not even have a solution. Try to plot it: syms t b=2*t+14.3; w=3*t+21.45; A=(w*b)-(w-t)*(b-2*t); rc=(w*...

7 days ago | 0

Answered
unable to get matlab to recognize the python installed on my computer
python on Windows might be tricky. Did you follow this page? Maybe you need to setup your PATH environment variable first?

7 days ago | 1

| accepted

Answered
Issues Using python from MATLAB
python has trouble to find the package selenium. One easy way out is to set the environment variable PYTHONPATH inside matlab to...

7 days ago | 0

Answered
Call component callback from another function
A callback function in your case is just a method of a class. You called your class file1 apparently. The Save method doesn't de...

8 days ago | 1

Answered
Bulk upload issue - HTTP Error code 502
You are using python code, but this is a matlab forum, right? In general, three suggestions: Try curl. This can tell if there ...

20 days ago | 1

Answered
Save a matrix .mat in a specific folder with a variable name
Try something this: a = 100; for i=1:3 file_name = ['filename' num2str(i)]; save(file_name, 'a'); end

22 days ago | 0

| accepted

Answered
c code and makefile to matlab
If you can compile it and run it from terminal, can you just use the system command?

22 days ago | 0

Answered
Can I see the text of a compiled *.m file?
The folder you mentioned in general is used for caching data locally. Most likely during compilation. This might not happen in t...

1 month ago | 0

Answered
Working with fortran Mex files on Mac OS
Try this answer.

1 month ago | 0

Answered
Plot Time Sensitive Data plus a fit in the same plot
To show more than one plots in a figure, use plot(Date, Thickness, '.'); hold on % this means you want more than one plots in ...

2 months ago | 0

Answered
Creating MATLAB tests in separate folder/module
Use addpath("your_root_path")

2 months ago | 0

| accepted

Answered
How to write this expression in MatLab
e^x is exp(x) in matlab, and lnx is log(x).

2 months ago | 1

Answered
How do I subplot figures and Title Figures
Try this: subplot(2, 3, 1); % there are 2x3 images, this is the first one imshow('the_first_image.png'); % show first title...

2 months ago | 1

Answered
Not enough input arguments
What is confusion.getMatrix? The built-in confusion is a function. There is another confusionmat, but the return arguments don't...

2 months ago | 0

Answered
I want to make a GUI in which only those functions run whose radio button is on, but how to make it?
Radio buttons or checkboxes? You can have a figure with multiple plots. Say if you have 10 checkboxes, then put 10 plots in th...

2 months ago | 0

Answered
Turn a two dimensional vector into an array
Check this command?

2 months ago | 0

Answered
How can i Calculate this with matlab?
If the series is convergent, one way is to set a cutoff value (for example epsilon = 0.00000001). Then when you do the sum from ...

2 months ago | 0

Answered
How to change the name of variables inside a file.mat?
How about this? t=100;C=80; % your data save('data.mat', 't','C'); clear; load('data.mat'); %load it first texp=t; Cexp=C...

2 months ago | 0

| accepted

Load more