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...

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...

environ 2 ans ago | 1

| accepted

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...

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...

environ 2 ans ago | 0

Answered

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...

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...

environ 2 ans 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...

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...

environ 2 ans 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...

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...

environ 2 ans 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 ...

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 ...

environ 2 ans 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 = ...

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 = ...

environ 2 ans ago | 1

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Answered

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)

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)

environ 2 ans 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...

environ 2 ans 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...

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...

environ 2 ans 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...

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...

environ 2 ans 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...

plus de 2 ans 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...

plus de 2 ans ago

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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...

plus de 2 ans ago

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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...

plus de 2 ans ago

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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...

plus de 2 ans ago

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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...

plus de 2 ans ago

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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...

plus de 2 ans ago

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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...

plus de 2 ans ago

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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...

plus de 2 ans 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...

plus de 2 ans ago

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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: * ...

plus de 2 ans ago

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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....

plus de 2 ans ago

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Convert a Cell Array into an Array

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

plus de 2 ans ago

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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...

plus de 2 ans ago

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Convert a numerical matrix into a cell array of strings

Given a numerical matrix, output a *cell array of string*. For example: if input = 1:3 output is {'1','2','3'} whic...

plus de 2 ans ago

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Create a cell array out of a struct

Create a cell array out of a (single) struct with the fieldname in the first column and the value in the second column: in: ...

plus de 2 ans ago

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Cell joiner

You are given a cell array of strings and a string delimiter. You need to produce one string which is composed of each string fr...

plus de 2 ans ago

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Scrabble Scores

Given a word, determine its score in <http://en.wikipedia.org/wiki/Scrabble Scrabble>. The input string will always be provi...

plus de 2 ans ago

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Summing Digits within Text

Given a string with text and digits, add all the numbers together. Examples: Input str = '4 and 20 blackbirds baked in a...

plus de 2 ans ago