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Please help, I don't understand the error. How I can make it correct?
The line here need to be fixed: ndataSIR=20*[0 randn(0,width,[1,numpts]); 0 randn(0,width,[1,numpts]); 0 randn(0,width,[1,nump...

2 years 前 | 0

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How to perform inverse between a page of a 3D matrix and a column vector without loops?
load H.mat load A1.mat size(H) size(A1) answer = H.\A1; size(answer)

2 years 前 | 0

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CSV or XLSX to write data
CSV would be faster.

2 years 前 | 0

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how can I add noise to an image using the Slider
See app attached. Let me know if you have any questions.

2 years 前 | 0

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Determine what UI Object Called a Context Menu
Could you create a property variable that stores the handle of the last clicked listbox? something such as: properties ...

2 years 前 | 0

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I have an satellite image and I want to extract the information from ROI of image?
Note, I used Computer Vision Toolbox below. Capture_img = imread('Capture.jpg'); Picture1_img = imread('Picture1.png'); imsho...

2 years 前 | 0

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How to remove rows with specific number and column in table?
t=table; t.Num = round(4*rand(814,1)); sum(t.Num==0) randhalf = (t.Num==0).*rand(size(t.Num)) randhalf = randhalf>.5 % chang...

2 years 前 | 0

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How to let the user input an excel file (i.e .csv file) and array in MATLP APP Designer
Attached are two examples of apps opening Excel files.

2 years 前 | 0

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How to count pixels/measure area in binary image?
img = imread("sample.png"); img = im2bw(img); imshow(img) se = strel('sphere',15);; circles=imopen(~img,se); imshow(circles...

2 years 前 | 0

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How to extract character and number only from this image to .txt?
You could use the optical character recognition (ocr) function that comes with the image processing and computer vision toolbox ...

2 years 前 | 0

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How to avoid overwrite in excel in apps designer
You can change the write mode as such: writecell(tab,fullfile(selectPath,filename),'WriteMode','append');

2 years 前 | 0

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How to detect if passed handle is a handle to an App Designer Application
metaclass(app).Description Should return 'Properties that correspond to app components' if it is an app. where the input "app"...

2 years 前 | 0

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What does this line mean
You can read about the function, unifrnd, here: https://www.mathworks.com/help/stats/unifrnd.html

2 years 前 | 0

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code errors at app designer
You need to make the fullname variable a property variable, so that it can be used by the different functions within the app. ...

2 years 前 | 0

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app designer readmatrix only 1 row
I would have used a similar approach. This could be faster depending on the size of your data: prueba = readmatrix(app.filename...

2 years 前 | 0

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How to display only certain UITable data in a graph?
Obtain values from the first column that contains the check boxes. selected = app.UITable.Data(:,1); Use the logic array (sele...

2 years 前 | 0

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combing two arrays into a table (app designer)-Array indices must be positive integers or logical values.
Here are a few options to consider below. 1. Define variables You can define variables when they are created as properties...

2 years 前 | 1

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Grouping and averaging values within a matrix
m = [-1.60120522975922 -0.522726416587830 1.67500007152557 -1.60120522975922 -0.518805325031281 1.67500007152557 -1.5972841978...

2 years 前 | 1

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trouble plotting curved line
I'm not sure what you are trying to graph. I don't know what the T and S variable are suppose to be. Here is a guess of what I t...

2 years 前 | 0

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i got a question regarding showing the after picrute on app designer
I answered this here: https://www.mathworks.com/matlabcentral/answers/1869472-hi-guys-how-should-i-fix-i-this-code-error-its-su...

2 years 前 | 0

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hi guys how should i fix i=this code error its supposed to be changing an image to gray scale mind u this is in app designer
Have you tried using im2gray instead of rgb2gray?

2 years 前 | 0

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can someone write the line code that checks if the image is rgb and convert it to gfrayscale
If you want a quick fix you can do the following: try rgb2gray(Image) catch disp("Error using rgb2gray") end or yo...

2 years 前 | 1

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How to do math using datetime objects including years
date_obs = '22:179:18:42:44.610'; j2000date = '2000:001:12:00:00.000'; formatOut = 'uu:DDD:HH:mm:ss.SSS'; % ...

2 years 前 | 0

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I want to use the two buttons and have the text field change once a folder is selected. Then have the figures and the jpg's save to those respective folders.
Add property variables properties JPEGSaveLocation MATLABFigureSaveLocation end add Callback to "JPEG Save Location...

2 years 前 | 0

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I want to put multiple plots on a graph but be able to turn on and off the visibility for a few plots
Create a property variable properties p end Define that property value (do so in startup function or in callback functio...

2 years 前 | 0

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Using mouse button to get lat long coordinates
the inputm function does not work with geoaxes. Try using ginput instead. [lat, long] = ginput(1);

2 years 前 | 1

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How to use a edit box on a GUI
Add a callback to the ninth_button that reads the value in the 'eighth_button' edit field and places it as an input to the walk ...

2 years 前 | 0

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Defining the Parent location of a UIAxes plot
remove ax = gca; %This creates a new axis when there isn't an axis in a figure window. Edit: This line isn't needed in for l...

2 years 前 | 0

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Empty plot returning when I try to graph
%sigmayy along theta = 0 degrees for ii = 1:10; for jj = 1:10; x = ii/1000; y = (jj-500)/1000; xtip = x - ...

2 years 前 | 0

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How do you apply an image threshold and track a centroid in a video?
You can use VideoReader. Here is an Example reading a video file. Edit: As for calculating the velocity, you can make your Ce...

2 years 前 | 0