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# Turlough Hughes

Last seen: 1 day ago Active since 2019

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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 ...

20 days 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).'

20 days 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...

24 days ago | 0

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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...

25 days ago | 0

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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 ...

25 days ago | 0

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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...

25 days 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')

25 days 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

25 days ago | 1

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Answered
Random values in timetable
You can collect the data in the loop and then use timetable n = 1; for i = 1:5 Time(i,1) = datetime('now'); Conducti...

25 days ago | 2

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Insert values of one vector at specific places into another
a = [0 0 0 0 1 0 0 0 1 0 1 0 0 0 1 0 0 1 0]; b = [ 10 20 30 40 50 ]; c = zeros(size(a)); c(logical(a)) = b

26 days ago | 0

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Answered
access data returned from a method of a class in other methods
You could make it a private property, the private property can only be accessed by the class (see property attributes). You're p...

26 days ago | 0

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How can I find the Y value on an X–Y plot that corresponds to the tangent of the flattest part of a curve?
How robust this is depends on the consistency of that initial pattern, i.e. the initial acceleration followed by a period of dec...

26 days ago | 1

Answered
How to locate the x and y co-ordinate of minimum value from a contour plot automatically ?
Try: [min_e,index] = min(e,[],'all','linear'); x_min = x(index); y_min = y(index); hold on, plot(x_min,y_min,'ok','MarkerF...

27 days ago | 1

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Set properties from Superclass in subclass
Set the Access attribute in the superclass: classdef food properties protein carbs end ...

29 days ago | 0

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Repeat a 2D matrix at multiple places in 5D matrix
You could do the following: A(:, :, 2, :, :) = repmat(B,1,1,1,2,2);

29 days ago | 0

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Answered
Unable to perform assignment because the left and right sides have a different number of elements.
Your vlookup is not returning a value when j = 634. You will need a condition to deal with this when it happens. For example...

29 days ago | 0

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add data information with scatter or plot
Personally, I would just use scatter3 and then look at the data from above (along the z-axis). So something like: scatter3(x,y,...

30 days ago | 0

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Answered
Interchange dimensions of cell array and the matrices included in it
Here's one way temp = vertcat(originalData{:}); D = repmat({zeros(3,27)},1,1000); % preallocate for ii = 1:1000 D{ii} = ...

1 month ago | 0

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rectangle invisible in matlab
The following works for me: roi.Visible = 'off';

1 month ago | 1

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Answered
How to extract points from a 3D plot that fall within a particular distance from the center coordinate?
The points which are within a radius, r, from the origin can be obtained as follows: index = sum(X.^2,2) < r^2; % X is an n by...

1 month ago | 1

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connect Matlab to Binance API
Try my recent submission to the file exchange: MATLAB-Binance-API Then placing a limit order is simply: obj = spot.newOrder(...

2 months ago | 1

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Finding coordinates with image processing
You could use the regionprops function to get the centroids. See the following example: % This just sets up an image for demo ...

3 months ago | 0

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Extracting files of the same name only from the first level of subdirectories
Hey Bob, a single star will go down one level only, so try the following: list = dir(fullfile(Alevel,'*','filename.txt'))

4 months ago | 0

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switch command on listbox value
You can get an index of the selected values as follows: idx = ismember(app.ListBox.Items,app.ListBox.Value); Then, make the pl...

4 months ago | 0

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Reading values from xml file
You can now read XML files in R2021a using readtable (and readtimetable). For example: filename = 'students.xml'; T = readtabl...

4 months ago | 1

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How can I assign information to my array file?
You could make a table as follows: w = strings(size(mci)); w(mci<0.4) = "wheeze"; w(mci>=0.4) = "non-wheeze"; T = table(mci....

4 months ago | 0

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Answered
Capture plot titles using getframe and writerobj
You can use the figure handle (instead of the axis handle) with the getframe function and that captures the entire interior of t...

4 months ago | 0

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Answered
How to divide images from folder into 4x4 blocks
Hi Petrus, the mat2cell approach that Jonas pointed out can be done more generally as follows. Note, this handles the scenario w...

5 months ago | 0

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Identify index of cell based on stringlength
Example data: Tstr{1}{1,1} = 'Hello... It me, I was wondering if after all these years youd like to meet'; Tstr{1}{2,1} = '18...

5 months ago | 0

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