Answered
Sort Matlab table based on pre-defined order
Try the following: idx = [2 1 3 4]; T(idx,:) = T

3 years ago | 0

Answered
Check if cell contains only certain combination of variables
You can do this with an "exclusive or" (see xor) where you check that you have exlusively either 'A' or 'B' xor 'C' or 'D', but ...

3 years ago | 0

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Answered
Divide the 3D feature space into grid and then get their labels
Example in 2D % Data x = rand(1,100)*10; y = rand(1,100)*5; r = zeros(size(x)); % group index r(x>0 & x<=5 & y>0 & y...

3 years ago | 1

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Answered
Reformat table with a column as a top row
You can reorganise the data pretty close to what you showed using unstack, but to get the header organised as you have shown wou...

3 years ago | 0

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Answered
How could I make a callback that updates when the user moves an roi?
This is what I had in mind: interactiveZoomDemo; function [] = interactiveZoomDemo() I = imread('saturn.png'); hf = figu...

3 years ago | 0

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Answered
How to decrease margins around uibutton in uigridlayout?
Use the ColumnSpacing property: g.ColumnSpacing = 1;

3 years ago | 0

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Answered
How to create rainbow colormap with violet
Violet is approximately [0.5 0 1] in the rgb space. So we can modify the blue part of the jet colormap, to have a bit more red ...

3 years ago | 0

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Save an image from a matrix
Here's one way - convert to an 8 bit array with values between 0 and 255 and then save: I2 = 255*(I - min(I(:))) ./ (max(I(:)) ...

3 years ago | 2

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Answered
Would it be possible to change the greyscale to a blue scale?
I don't think MATLAB has a blue scale colormap. You could do something custom, like the following. I'll use camerman for illustr...

3 years ago | 0

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Answered
How to get integer pixel coordinates from roi rectangle?
When used on images, the drawrectangle function uses intrinsic image coordinates (see this documentation) as shown by the x and ...

3 years ago | 0

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Answered
Assign dimensions for my image. I have an image and I need to give it a length that I know.
The imref2d object is useful for exactly this. Let's have a look at an example: % Example of a Binary image BW = imbinarize(im...

3 years ago | 0

Answered
No effect of the FaceLighting property on a single patch?
There are two reasons. First is that you need to add a light object to the axes. To do that, use the light function. The secon...

3 years ago | 2

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Answered
How can I find distance in a binarized image
I originally answered this for the case of the binary image you represented in png format (this is not technically a binary imag...

3 years ago | 2

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Answered
how do i deduce the function using linear regression for a set of x and y values?
Consider using a power fit. Your data: x = readmatrix('https://uk.mathworks.com/matlabcentral/answers/uploaded_files/850570/x2...

3 years ago | 1

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Answered
I need to make a general code
Try this: function [idx,x] = chaoticInterleaver(N) assert(mod(N,8)==0,'N must be divisible by 8.') idx = zeros(N); x = N * (...

3 years ago | 0

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Answered
Rearrange a correlation matrix into a vector and keep track of the corr names.
You can get the corresponding row and column indices as follows: [iRow, iCol] = find(ind); Then you can get the corresponding ...

3 years ago | 0

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Answered
Properly centering interquartile ranges on graphed data
You can use the quantile function Your simulation: clc clearvars %Total number of replicates nr=1000; %Time step and lengt...

3 years ago | 0

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Answered
Converting a 2d array into a 3d array
You could write a linear index for the diagonal elements as follows: [m,n] = size(Z_int) Z = zeros(m,m,n); idx = repmat((1:...

3 years ago | 0

Answered
Image cropping in exact cordinate in cell array
You can make the following modification (make sure to place your cellfun calls after the for loop) cropped_imgs = cellfun(@(I) ...

3 years ago | 1

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Answered
Count instances of subarray inside array
You could do the following: b = A == 2; % binary indicating where A equal to 2 count = 0; ii = 1; while ii < numel(A) i...

3 years ago | 0

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remove rows in table based on criteria across two columns
Try the following: T(contains(string(T{:,1}),'80ms,140ms') & T{:,2} ~= 1,:) = []; T(contains(string(T{:,1}),'100ms,250ms') & T...

3 years ago | 0

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Answered
Clone GitHub repository - Authentication Failed
You need to follow the steps described <https://uk.mathworks.com/help/matlab/matlab_prog/set-up-git-source-control.html#mw_77963...

3 years ago | 0

Answered
how do i store for loop values?
There's only one value because your code is working as follows: for ii = 1:3 A = ii + 1 end Matlab is not told where to ...

3 years ago | 0

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Answered
Cannot obtain structure elements where both field and variable are indexed into
Try the following: students(1).name='john'; students(2).name='andrea'; arrayfun(@(x) students(x).name(1), 1:2).'

3 years ago | 0

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Answered
I wanted to 3D plot my data like shown in attached image.
Use <https://uk.mathworks.com/help/matlab/ref/surf.html surf()> or doc surf there are several examples at both locatio...

3 years ago | 0

Answered
how to convert from grayscale to rgb by lightness method ??
You can do the following: I=imread('peppers.png'); newImage = uint8(( double(min(I,[],3)) + double(max(I,[],3)) ) ./ 2); im...

3 years ago | 0

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Answered
evaluate rising edge sample of a signal
Is it just the local minima you're having trouble with? Edit: The rising edge is found where the slope of the original data ...

3 years ago | 0

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Answered
How to marker a fplot(anonymous function) function on a specific point which user enters.
You can add it in at the end of your function using plot: function x=calcDisplacement(t) m=1100; k=570; c=430; x0=0.05; v0...

3 years ago | 0

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Answered
how to select and save particulat part of a column in mat file?
columns = [2 3 5]; rows = 50:100; x = mydata(rows,columns); save('mydata.mat','x')

3 years ago | 1

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Answered
How to save data in a vector for each loop indice?
x = 1:0.1:1.5; vec=zeros(size(x)); for ii = 1:numel(x) sol = x(ii)+1; vec(ii)=sol; end vec

3 years ago | 1

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