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**Feeds**

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 ...

ungefär en månad ago | 1 answer | 0

### 1

answerQuestion

Confusing sprintf() behavior

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

ungefär 2 månader ago | 1 answer | 0

### 1

answer[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...

2 månader ago | 0

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...

5 månader ago | 0

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...

5 månader ago | 0

| accepted

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...

11 månader ago | 0

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...

11 månader 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...

12 månader ago | 1 answer | 0

### 1

answerintersections 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.

mer än ett år ago | 1 download |

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

| accepted

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

| accepted

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

### 1

answerHow 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...

mer än ett år ago | 0

| accepted

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...

mer än ett 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...

mer än ett år ago | 0

| accepted

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...

mer än ett 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...

mer än ett 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...

mer än ett år ago | 0

| accepted

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 ...

mer än ett år ago | 0

| accepted

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...

mer än ett 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 ...

mer än ett år ago | 0 answers | 0

### 0

answersPlot timeseries for mean monthly temperature

Try this. xdata = datenum(dataClean(1:3)'); ydata = dataClean(4,:)'; plot(xdata,ydata); datetick x Cheers

mer än ett 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...

mer än ett år ago | 0

| accepted

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...

mer än ett år ago | 1

| accepted

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,....

mer än ett 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');

mer än ett 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'...

mer än ett år ago | 0 answers | 0