Community Profile # 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.

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Calculating the projection of a point onto a plane
How about this approach: Orthogonal projection can be thought as the (smallest) distance from this point to the plane. Assume ...

21 hours ago | 0

Submitted

Animate gradient descent in 3D plot or 2D contour plot. Visualization. Demonstrate impacts of alpha, starting point, saddle po... How to add the path to a Conda (Python) Environment?

8 days ago | 0

How to add the path to a local python file to be executed by a Matlab script?
Python uses an env var called PYTHONPATH to point to packages/scripts. So inside matlab, you just need to add the path you want ...

8 days ago | 0

Newton's Method to Solve Equation
You need to substitute symbols with values, right? L = 1.0; h = 2.0; T = 3.0; g = 9.8; % substitute ret = subs(Df); % c...

8 days ago | 0

Automatically open new files as they appear in a folder
Implement a background thread that scans the folder?

15 days ago | 0

How can I fix this error and what does mean by should return 1 or two arguments help pls
userFG shall return one or two arguments. You can see that the code tries to call userFG and retrieves two returns. If this call...

15 days ago | 0

How to transfer a series of Word files to pdf files?
matlab doesn't have word2pdf function. Implement your own word2pdf function like below following this link, then you can just f...

15 days ago | 1

Why is my function not working?
You meant: function U = velocity(n,S,H,B) U = sqrt(S)*((B*H/(B+2*H))^(2/3))/n; end

17 days ago | 0

Failed to call python modules due to lack of 'core' in numba
I would recommand the following steps to narrow down the issue: From the error message, it seems like matlab can find numba but...

21 days ago | 0

JAGS 3.4 not recognised as command in MATLAB Win10
It seems like an issue of the PATH env var? Try to set the PATH env var to point to those folders?

21 days ago | 0

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Hooking Matlab Online to a local Python installation?

21 days ago | 0

how to repeat a loop until a condition is met than draw histogramm
Just use a while loop? Try: done = false; while ~done u1=2*rand()-1; u2=2*rand()-1; d=(u1.^2)+(u2.^2); d...

21 days ago | 0

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Seems like you need to bridge it. Your local PC and Google Colab shall be able to communicate using python, I imagine. Using H...

21 days ago | 0

This is the same as calling matlab from python, right? Can you call it from python first?

23 days ago | 0

Bessel function values using starting values
matlab has built-in function. Compare against it. https://www.mathworks.com/help/matlab/ref/besselj.html

23 days ago | 0

API usage with matlab
Use webread with options. The first hurdle is the authentication. Try this one: auth If you are comfortable with curl, the no...

23 days ago | 0

Why do I receive Not enough input arguments?
Try this: function [SA]=equTriPrismSurfArea(sIn,hIn) for i = 1:5 s1 = sIn(i); h1 = hIn(i); S...

23 days ago | 0

how to use function handles
You don't need varargin function A = function1(n,a,b, c, d) A = n+a+b+c+d; end function A = function2(n,a,b, ~, ~) A = n*...

23 days ago | 0

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Jump to specific page in matlab multiply times // closing PDF File in Matlab
This is not a matlab issue. If you run those two commands on a terminal, you will see the same behavior. Basically the first c...

26 days ago | 0

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How do I reformat a set of differently formatted dates in to one consistent format?
Check this: https://www.mathworks.com/help/matlab/ref/datestr.html

28 days ago | 0

Can I use fuzzy logic function in online?
It belongs to a toolbox: https://www.mathworks.com/products/fuzzy-logic.html Maybe your license doesn't include this toolbox?

30 days ago | 0

Is there a way to put the same uitable in two seperate places? (Matlab App Designer)
Is it better to put your table in a shared area of tabs?

30 days ago | 0

Running a Python Script with multiple inputs and outputs through Matlab
One interesting trick is to use json. From python, serialize all the outputs into one single json string. In matlab, convert the...

1 month ago | 1

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Convert Subsystem into Referenced Subsystem programmatically?

1 month ago | 0

rectangle invisible in matlab
Try this: H = findobj('Type', 'images.roi.rectangle');

1 month ago | 0

matlab can call python script. Use python to read and then pass the data to matlab. Or use python to convert the data into CSV o...

1 month ago | 0

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how to simplify the inequality?

1 month ago | 0