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Turlough Hughes


Last seen: 4 days ago
213 total contributions since 2019

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

8 days ago | 3 downloads |

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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...

6 months ago | 0

Answered
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...

7 months ago | 0

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

7 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...

7 months ago | 1

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Answered
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...

7 months ago | 1

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Answered
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...

7 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...

7 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...

7 months ago | 0

Answered
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...

7 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 ...

7 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 = ...

7 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)

7 months ago | 1

| accepted

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...

9 months ago | 1 answer | 0

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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...

9 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...

9 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...

10 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...

10 months ago

Solved


Area of an Isoceles Triangle
An isosceles triangle has equal sides of length x and a base of length y. Find the area, A, of the triangle. <<http://upload...

10 months ago

Solved


Is this triangle right-angled?
Given three positive numbers a, b, c, where c is the largest number, return *true* if the triangle with sides a, b and c is righ...

10 months ago

Solved


Find a Pythagorean triple
Given four different positive numbers, a, b, c and d, provided in increasing order: a < b < c < d, find if any three of them com...

10 months ago

Solved


Is this triangle right-angled?
Given any three positive numbers a, b, c, return true if the triangle with sides a, b and c is right-angled. Otherwise, return f...

10 months ago

Solved


Length of a short side
Calculate the length of the short side, a, of a right-angled triangle with hypotenuse of length c, and other short side of lengt...

10 months ago

Solved


Natural numbers in string form
Create a cell array of strings containing the first n natural numbers. _Slightly_ harder than it seems like it should be. Ex...

10 months ago

Solved


Fix the last element of a cell array
Note: this is lifted directly from <http://www.mathworks.com/matlabcentral/answers/82825-puzzler-for-a-monday Puzzler for a Mond...

10 months ago

Solved


String Array Basics, Part 1: Convert Cell Array to String Array; No Missing Values
<http://www.mathworks.com/help/matlab/characters-and-strings.html String array> and cell array are two types of containers for s...

10 months ago

Solved


Cell Counting: How Many Draws?
You are given a cell array containing information about a number of soccer games. Each cell contains one of the following: * ...

10 months ago

Solved


Remove element(s) from cell array
You can easily remove an element (or a column in any dimension) from a normal matrix, but assigning that value (or range) empty....

10 months ago

Solved


Convert a Cell Array into an Array
Given a square cell array: x = {'01', '56'; '234', '789'}; return a single character array: y = '0123456789'

10 months ago

Solved


Split a string into chunks of specified length
Given a string and a vector of integers, break the string into chunks whose lengths are given by the elements of the vector. Ex...

10 months ago

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