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Last seen: 6 jours il y a |  Actif depuis 2011

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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...

2 mois il y a | 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...

2 mois il y a | 1 réponse | 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 ...

8 mois il y a | 1 réponse | 0

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

9 mois il y a | 1 réponse | 0

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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...

9 mois il y a | 0

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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...

12 mois il y a | 0

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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...

12 mois il y a | 0

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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...

plus d'un an il y a | 0

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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...

plus d'un an il y a | 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...

plus d'un an il y a | 1 réponse | 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...

presque 2 ans il y a | 0

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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...

presque 2 ans il y a | 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...

presque 2 ans il y a | 0

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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...

presque 2 ans il y a | 0

Réponse apportée
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.

presque 2 ans il y a | 0

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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...

presque 2 ans il y a | 1 réponse | 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...

presque 2 ans il y a | 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...

presque 2 ans il y a | 0

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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...

presque 2 ans il y a | 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...

presque 2 ans il y a | 0

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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...

presque 2 ans il y a | 0

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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...

presque 2 ans il y a | 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 ...

presque 2 ans il y a | 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...

presque 2 ans il y a | 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 ...

presque 2 ans il y a | 1 réponse | 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

environ 2 ans il y a | 0

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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...

environ 2 ans il y a | 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...

environ 2 ans il y a | 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,....

environ 2 ans il y a | 0

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

environ 2 ans il y a | 0

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