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Benjamin Thompson


Last seen: 4 days ago Active since 2015

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

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  • 3 Month Streak
  • Revival Level 2
  • Knowledgeable Level 4
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Answered
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...

13 days ago | 0

Answered
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...

13 days ago | 0

Answered
Detect ColorChecker chart in an image
You could pass a different value for Sensivity to colorChecker. By default it is 0.6. For information on supported color space...

13 days ago | 0

Answered
Parameter Estimation in Simulink
You could look over this example: https://www.mathworks.com/support/search.html/videos/online-parameter-estimation-with-simul...

13 days ago | 0

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Answered
How do I get the matrix of gray levels from the "from Video Device" in Simulink
Double click on the block and change the output color space option to "grayscale" if you can. Or, the Computer Vision Toolbox o...

13 days ago | 0

Answered
uigetfile in appdesigner freezes MATLAB
uigetfile is supposed to open a file selection dialog box and let the user select a file? Do you not see that dialog box pop up...

13 days ago | 0

Answered
I want to use mvnrnd for generating numbers,but there is error in my code
X has 31 columns. mu only has 2 columns since d == 2. Both need to have the same number of olumns. sigma needs to have the sa...

13 days ago | 1

Answered
Why am I getting syntax
Missing two closing parenthesis it would appear. Is MATLAB suggestion not correct? You might do better breaking this up into m...

13 days ago | 0

Answered
How to generate a 1D random walk of 100 sample paths, along with sample mean and variance?
Try this to take advantage of vectorization in MATLAB. I may be confused about how you define "walks" and "steps", and whether ...

18 days ago | 0

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Answered
Matlab ginput mouse click freezes and does not obtain coordinates
Do not use ginput with AppDesigner. Here is some related discussion and some alternatives: https://www.mathworks.com/matlabcen...

18 days ago | 0

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Answered
How to read .s2p file as we read .xlsx file in Matlab. I am making a gui and it is having this as its feature.
The RF toolbox seems to have a function rfwrite: https://www.mathworks.com/help/rf/ug/writing-a-touchstone-file.html There a...

18 days ago | 0

Answered
Adding a row to an existing ones in Excel
I cannot review online documentation for releases earlier than R2017A, but in that release readtable supports a 'TextType' optio...

22 days ago | 1

Answered
what is command for instead DEGREES(ATAN2(A2,B2)) formula in excel??
Since -179 and 179 degrees are very nearly equal, those results are actually within the tolerance of your other results. If you...

22 days ago | 0

Answered
If A and B are 2x2 matrices, how is the input (A*B)^2 interpreted by MATLAB as?
Since 2x2 matrix multiplication is supported by the associative property, both of those interpretations are the same. This is s...

22 days ago | 0

Answered
matlab standalone exe splash screen appears and close, not running exe, tried several things but no success. Anyone has anything, please???
Here is a list of MATLAB runtimes that need to be installed for executables created from the MATLAB Compiler for each release of...

1 month ago | 0

Answered
azimuth, elevation to x y z rotation
Your question is incomplete. Azimuth and elevation are two angles and there is no single point solution [x, y, z] that satisfie...

1 month ago | 0

Answered
matlab rank of a matrix
You are probably attempting to go below the numerical precision of your hardware and software: eps ans = 2.2204460...

2 months ago | 0

Answered
how to solve this error?
You can use the print function to save a figure to disk. See this thread: https://www.mathworks.com/matlabcentral/answers/10...

2 months ago | 0

Answered
create csv file with user input and current date as name
Use sprintf to generate a local string variable. Use a \\ sequence to include a single \ in the string. Then pass the string a...

2 months ago | 0

Answered
How can I average values from 3 consecutive rows of a matrix in one designated column repeatedly over the whole matrix?
If your matrix can have a number of rows that is a multiple of three, and you should know its size at the time you need to perfo...

2 months ago | 0

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Answered
How to concatenate multiple text files in a single matrix
The third file does not have as many columns as the first two. Table concatenation requires a consistent number of variables to...

2 months ago | 0

Answered
Plotting satellite elevation and azimuth using skyplot
You have to make all data into a one dimensional vector, not a two dimensional matrix. One quick way is to use one colon instea...

2 months ago | 0

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Answered
Plotting satellite elevation and azimuth using skyplot
skyPlot is intended to show a snapshot of multiple satellites rather than a plot history. Type "doc skyplot" for details. Here...

2 months ago | 0

Answered
Runge-Kutta matlab library
ode45 is the closest Runge Kutta implementation for what you are describing. Type "doc ode45" for details.

2 months ago | 0

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How to store the difference between adjacent pixel values of image
Use imfilter with a 1D filter argument. If your h is vertical then the difference operation is in the vertical direction. If t...

3 months ago | 0

Answered
What is the equilavent function for niftiread in 2016 matlab? Can't upgrade on current SSH
There are some third party posts of code for reading Nifti on the MATLAB File Exchange.

3 months ago | 0

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Answered
Bad Image Rectification after Stereo Calibration and Image Rectification (From 2D to 3D)
If you are using this function, note its description in the documentation: [J1,J2] = rectifyStereoImages(I1,I2,stereoParams) ...

3 months ago | 0

Answered
how to find lines and update values in an XML file and then export the updated XML file?
The easiest thing (other than just your own text editor), is xml2struct and struct2xml from Wouter Falkena from the File Exchang...

3 months ago | 0

Answered
Concatenation of multiple matfile into one matfile
MAT files contain a list of variables with your data. Please post a sample MAT file for the Community to see if you have furthe...

3 months ago | 0

Answered
Hello. I'm using the following code in embedded matlab in simulink. And I,m getting the message that Variable 'D' is not fully defined on some execution paths. And i don't kno
If DeltaVA could evaluate to zero then D will not be defined. If you want to be sure D is defined, then initialize it to a good...

3 months ago | 0

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