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How to use Matlab to find a pressure in a temperature and density spreadsheet using the nearest density value.
This should be an interpolation in 2 dimensions and should work in a straight forward way unless I missed a key detail in your d...

7 months ago | 0

Question

parfeval performance inside appdesigner apps
I have an image processing routine that takes 4-5s when run on a single thread. If parallelized using parfeval() inside an m scr...

7 months ago | 0 answers | 0

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Question

Incorrect result from camera calibrator app
I used the camera calibrator app to calibrate lens distortion and I specified correct checkerboard size of 8mm. The calibration ...

1 year ago | 1 answer | 0

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Question

Confusing sprintf() behavior
>> sprintf('%.3f ',[.1 .2 .3]) ans = '0.100 0.200 0.300 ' >> sprintf('%s, %.3f ',datestr(now),[.1 .2 .3]) ans = '...

1 year ago | 1 answer | 0

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Answered
[Simulink] choosing wich blocks to run based on variable
You may be able to do it with an if-else block. It's not clear how long the data acquisition will be but some kind of logic or m...

1 year ago | 0

Answered
why do i get "Array indices must be positive integers or logical values " and how do i solve it ?
your X_period should equal to X(1:24) If you want to view it shifted you can have idx = -11:12; and either use plot(idx...

1 year ago | 0

Answered
movegui in app designer
I opened your mlapp in R2021b (macos intel) and found objects misplaced. I dragged them into positions, saved, closed and reopen...

1 year ago | 0

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Answered
Plotting in 3D using dashed and solid lines for a given range of R2
You may call quiver3() twice in separate statements one with solid line spec and the other with dashed line spec. E.g. as your...

2 years ago | 0

Answered
How to set a variable in the simulink workspace from the model itself?
You can use model callback functions. E.g. Preload, postload, init. See more info here https://mathworks.com/help/simulink/ug/mo...

2 years ago | 0

Question

Vectorizing a loop for cumulative sum with reset
The lines below work fine to compute cumulative sum on a 1D logical array ('s') such that the summation resets to zero whereever...

2 years ago | 1 answer | 0

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Answered
intersections between rays and 2D square grid
Each line has an equation, and in this case several lines have simple equations like y=c (horizontal lines) or x=c (vertical lin...

2 years ago | 0

Submitted

Peirce's Criterion for Outlier Removal
Apply Peirce's criterion for outlier detection for arbitrary number of observations 3 or more using Gould's implementation.

2 years ago | 1 download |

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Answered
How to put name of images files on workspace ?
Initialise count = {}; instead of count = []; then replace the count update before imwrite() as count(end+1,:) = {file_nrm...

2 years ago | 0

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Answered
3 point radius of curvature of a circle
Just fit a circle through the xy coordinate data and you would get centre and radius. See https://lucidar.me/en/mathematics/lea...

2 years ago | 0

Answered
How do I design my code so that when the user presses a button, a sound plays?
In the app you will see callback functions for each button. Eg you right click a button and select add buttonpressed callback an...

2 years ago | 0

Answered
How to create a DLL file from .cpp and .h in Matlab?
You dont need matlab to compile C/cpp files. Just need a c/cpp compiler.

2 years ago | 0

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Question

Effect of os clock change on timers
I see that on Windows 7 and Matlab 2017a, timer execution can be thrown astray if OS clock jumps back. E.g., if timer callback w...

2 years ago | 1 answer | 1

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Answered
How to replace specific area of image with zeros in video loop
Instead of recreating the annotation in the loop, create just one annotation before the loop, assign a handle to it and inside t...

2 years ago | 0

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Answered
uidropdown does not extend beyond its parent figure
You are right, this doesn't seem to be a bug. Since the child objects cant extend beyond parent containers. However, in R2022b o...

2 years ago | 0

Answered
Scroll bar does not appear in tab group.
According to the documentation: Setting this property to 'on' enables scrolling within the container. However, there are additi...

2 years ago | 0

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Answered
how to read .txt file having the following format.
readtable(), importdata(), etc. You may just drag and drop the file into workspace to launch importwizard. Make the appropriate...

2 years ago | 0

Answered
The label component of an edit field is not showing in component browser of app designer
I don't think Label for an edit field exists as a separate object (at least not in very recent versions). It's a part of the edi...

2 years ago | 0

Answered
MATLAB is taking endless snapshots instead of a video, when trying to track colored object in webcam video.
Move call to figure() out of while loop. It opens a new window on each call in every iteration of the loop which is why your plo...

2 years ago | 0

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Answered
How can I make each iteration of a for each block create a unique random number?
You will have to generate a vector of random numbers outside and pass it as an input. Default partitioning of this vector might ...

2 years ago | 0

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Answered
How to plot a graph with logarithmic scale
I did a quick search and couldn't find a call to plot functions in your script. Where are you plotting? Did you try to use semil...

2 years ago | 1

Question

2022b Beta is suddenly unlaunchable on macOS M1
Today my matlab window became unresponsive. Not sure exactly when, but I had data import window and a plot open while connected ...

2 years ago | 0 answers | 0

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Answered
Plot timeseries for mean monthly temperature
Try this. xdata = datenum(dataClean(1:3)'); ydata = dataClean(4,:)'; plot(xdata,ydata); datetick x Cheers

2 years ago | 0

Answered
Error using stem X must be same length as Y.
The lengths of x and n are different, 19 and 25. Plotting requires them to be equal. I think you want to do x2 = zeros(size(n...

2 years ago | 0

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Answered
How can I write ANOVA results to a csv file?
Don't understand whats causing the problem, but the below line works writetable(ranovatbl(1:end,:),'test_table.txt') Really st...

2 years ago | 1

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Answered
How to convert excel date and time data into numerical integer matrix [year, month, day, hour, minute, second]
An easier way of doing that would be convert the dates into datenum so that you dont have to individually compare years,months,....

2 years ago | 0