# cr

Last seen: 3 månader ago Active since 2011

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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 ...

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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 = '...

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[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...

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...

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...

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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...

mer än ett år ago | 0

How to set a variable in the simulink workspace from the model itself?

mer än ett år 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...

mer än ett år ago | 1 answer | 0

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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...

mer än ett år 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.

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...

mer än ett år ago | 0

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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...

mer än ett år ago | 0

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...

mer än ett år ago | 0

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.

mer än ett år 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...

mer än ett år ago | 1 answer | 1

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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...

nästan 2 år ago | 0

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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...

nästan 2 år ago | 0

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...

nästan 2 år ago | 0

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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...

nästan 2 år ago | 0

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...

nästan 2 år ago | 0

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...

nästan 2 år ago | 0

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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 ...

nästan 2 år ago | 0

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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...

nästan 2 år 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 ...

nästan 2 år ago | 0 answers | 0

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

nästan 2 år ago | 0

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...

nästan 2 år ago | 0

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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...

nästan 2 år ago | 1

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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,....

nästan 2 år ago | 0

Arrays have incompatible sizes for this operation.
Try the following change in conv() call on line 5. h12 = conv(h1,h2,'same');

nästan 2 år ago | 0

Question

Constraining solution space of estimateGeometricTransform()
The last time I used estimateGeometricTransform() I had to manually deal with solutions that were of no interest. E.g. I wouldn'...

nästan 2 år ago | 0 answers | 0