Turlough Hughes

Last seen: 1 day ago

225 total contributions since 2019

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Answered
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 days ago | 0

Answered
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'))

1 month 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...

1 month 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...

1 month 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....

1 month ago | 0

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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...

1 month ago | 0

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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...

1 month 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...

1 month ago | 0

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bitget working with an example
As I'm sure you know, computers communicate at the lowest level with underlying switch-like states known as bits, whose digital ...

1 month ago | 2

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Getting error while deleting every row of the matrix M that contains the variable x
No need for any loops. Here's an example of data to work with M = randi(10,[10 3]); % sample data x = 3; % ...

2 months ago | 1

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Plotting doubles against cells
Here's an example, i've used X and Y in place of AAG and AAI to simplify: % example data X = arrayfun(@(x) cell(1,randi(1000,1...

2 months ago | 0

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Answered
Saving Output in a While Loop
You could store the letters as follows in the variable currentResult. I've added in some conditions to count lives. One could al...

2 months ago | 1

Submitted

codesearch
Quickly search all folders and subfolders from your user path for m-files that contain a specific search term.

2 months ago | 1 download |

Answered
Increase matrix size, with the first matrix a the center of the new matrix
There is a function made specifically for this called padarray, try the following example: A = rand(2000); B = padarray(A,[100...

8 months ago | 0

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Rescale points plotted using scatter3 based on their distance from the origin
Yes. Firstly get distances from the origin: d = sqrt(sum(A.^2,2)); If you have the machine learning & statistics toolbox, you...

9 months ago | 0

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Extracting specific rows with different content from a large table array
Tnew = T(T.MatDate>=SpecificDay-30 & T.MatDate<=SpecificDay+10,:);

9 months ago | 1

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How to pick the values from individual grids ?
The objective is to create an excel sheet with columns of data having different length. You can store data that has different le...

9 months ago | 1

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Sample a 3D surface
If I understand correctly, you just want to generate some x,y values that match your z values (i.e. b): [x,y] = meshgrid(1:size...

9 months ago | 1

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vectorizing or speeding looped code
This should help, though I've already made assumptions about the sizes of arrays. How many rows/columns are in each variable? X...

9 months ago | 0

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Efficiently calculating sum-thresholds across vector
You could do the following but with the caveat that it assumes samples are all positive values runningSum = cumsum(samples); i...

9 months ago | 0

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Answered
how to use an if statement to determine whether an index is out of bounds
If indices is outside of bounds, I want to display ''Error: index is out of bounds.' The conditional expression in your if bloc...

9 months ago | 0

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How can I create different colors in the plotted chart for a lot of data
I'm coming at this from a slightly different angle. You can interactively highlight different lines by setting up a slider in th...

9 months ago | 1

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Answered
how to get character from an array using another logical array?
A slight modification on your inputs: V = ['1b.%291x g'; 'yig&aaSgwa'; 'tqtbbs!?R!']; logicalVec = logical([ 1 0 1 0 1 0 1 ...

9 months ago | 0

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Answered
How to find the most frequently repeated time interval?
First I read in data as a string array opts = detectImportOptions(filename,'TextType','string'); opts.SelectedVariableNames = ...

9 months ago | 1

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How to find a corresponding matrix value
You can get the corresponding values in W as follows [mQ,idx] = max(Q,[],2,'linear') W(idx)

9 months ago | 1

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Question

Issue with browser slowing down while using MATLAB answers
While writing/editing answers on the forum, I've been having issues where the tab in my google chrome browser that's in use beco...

11 months ago | 1 answer | 0

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Answered
How to select different colors and legend for the bar plot??
For the first part of your question, you can do so as follows: x = rand(3,2); h = bar (x); h(1).FaceColor = 'red' h(2).FaceC...

11 months ago | 1

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Answered
averaging the matrix and creating an averaged matrix
As far as I understand you want the average of each 5 rows by 10 columns hence the expected output size of 53x101. You can do th...

11 months ago | 0

Solved

Side of a rhombus
If a rhombus has diagonals of length x and x+1, then what is the length of its side, y? <<http://upload.wikimedia.org/wikipe...

12 months ago

Solved

Dimensions of a rectangle
The longer side of a rectangle is three times the length of the shorter side. If the length of the diagonal is x, find the width...

12 months ago