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Benjamin Thompson


Last seen: 2 days ago Active since 2015

Programming Languages:
C++, C, MATLAB
Spoken Languages:
English

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  • 6 Month Streak
  • Revival Level 2
  • Knowledgeable Level 4
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Answered
Fourier series fit to a periodic function with multiple frequencies
Try looking over the documentation of the fft in MATLAB, along with the examples included there. If you have more specific ques...

2 days ago | 0

Answered
Video Writer for cycle detection
You can use frame2im(getframe(gcf)) to get an image that has the result of imshow and viscircles together.

2 days ago | 0

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Answered
Parallel for loop problem
You may want to review this thread and use parfeval if the partial results option is something you want. https://www.mathwork...

2 days ago | 0

Answered
Risk Matrix in MATlab
This is getting pretty close: %Define risk matrix 1-3 (1 low - 2 medium - 3 severe) C=[2 3 3 3 3 3; 2 2 3 3 3 3; 1...

2 days ago | 1

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Answered
MATLAB Coder does not recognize dot notation in struct member assignment
See the article "Name the C Structure Type to Use With a Global Structure Variable" in the MATLAB help documentation. You need ...

3 days ago | 0

Answered
Implicit casting overhead from real to complex when multiplying two matrices
Multiplying a complex matrix by a real matrix requires fewer calculations so should take less time. Your test is a little too s...

3 days ago | 0

Answered
How to change the max pixel value of the image
This is to increase the values of specific values in a matrix. You can probably take it from there: >> >> A = [35 40 45 55...

3 days ago | 0

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FFT of a Superposition signal
Try this, and see this article on usage of the FFT to understand how to interpret the results and assign results to frequencies....

3 days ago | 0

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enhance image quality for read Barcode
If your camera has autofocus, the reflection off the table below may be confusing it. Place something nonreflective with no hig...

10 days ago | 0

Answered
enhance image quality for read Barcode
Can you get a better photo? Can you read the barcode manually from this photo? You can use improfile to get something like thi...

13 days ago | 0

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Answered
How can I convert a file format FIG to PCD?
There is a function called pcwrite. The MATLAB documentation has a good article on it.

13 days ago | 0

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Finding an element in table without using if_else condition
You can do some operations on the Table variables to get index vectors: >> Table_A.A ans = 3×1 string array "...

13 days ago | 1

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Answered
How to call c2000 library functions with the S-Function builder?
If you are using mex to compile this C code into a binary for Simulink to use as an S-Function block, you probably need to use t...

16 days ago | 0

Answered
Customized Library version management
Simulink libraries just have one version number for the whole thing just like Simulink model files. You can not version each bl...

1 month ago | 1

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Answered
[SOLVED ALREADY] Loop through data struct with variable names
You want to index into the structure array, then pass one of those array elements to the length function: >> S1.E1 = [1 1]; ...

1 month ago | 0

Answered
Using Matlab to open a text file
Looks like subl is not in your search path. You can use the system command to print out the search path that the MATLAB process...

1 month ago | 0

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Answered
Embedded coder 'Generate code only' not including toolbox files
If you have some other toolchain to compile the source code, you can locate the file in the MATLAB program files folder and incl...

1 month ago | 0

Answered
Getting NaN while using the ratio of power and factorial
The factorial function output increases very fast as input increases. See "doc factorial" for details. The output is "inf" for...

1 month ago | 0

Answered
How do I grab all the files with a certain name pattern from several folders?
The dir function will work with wildcard characters: D = dir(fullfile(myFolder, '*grab*'))

1 month ago | 0

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Image correction based on the mesh of projection surface
The image processing toolbox has only more basic geometric transformations, and computer vision has some camera calibration tool...

1 month ago | 0

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Video background removal in MATLAB by K-means clustering processing technique
I am not sure if it uses K-means clustering but vision.ForegroundDetector can support that type of application: https://www.m...

1 month ago | 0

Answered
Why does my code bug down during while loop?
Have you tried the Profiler tool with your code? This can quickly highlite which parts take the most time. In this case line 2...

1 month ago | 0

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How to make matlab access two folders for data when separated by date
You can get file dates using the "dir" function or keyword in MATLAB. Does any of this help? >> D = dir D = 105×1 s...

1 month ago | 0

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Getting ginput to read axes on an appdesigner GUI
Here is a previous discussion on this topic: https://www.mathworks.com/matlabcentral/answers/392617-how-can-i-use-ginput-in-a...

1 month ago | 0

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Answered
How do you use parameters with simulink coder?
You can change the parameter configuration using the Model Parameter Configuration dialog like below. But note that code from S...

2 months ago | 0

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Does Simulink Free Trial Version R2022a include Simulink coder and Embedded coder?
No you will need to request trials for those products separately.

2 months ago | 0

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Data Type Conversion in simulink
Type "doc fixedt" in MATLAB to get a detailed explanation of the fixed point data types. If I right click on the data type conv...

2 months ago | 0

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How to do +,-,*,/ with one scalar and one matrix(IN GUI)?
Addition and subtraction are the same. You can add or subtract a scalar from a matrix. Adding or subtracting matrices requires...

2 months ago | 0

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extracting road from lidar
Hard to tell without sample images but if the road is consistently a big black thing, use imclose to help make the edges solid a...

2 months ago | 0

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Divide Image into Overlapping blocks and save it
An image is just a matrix. If you want to save a part, then imwrite(img(1:2084,1:1042), 'file1.jpg', 'jpg'); imwrite(img(1042...

2 months ago | 0

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