Kirby Fears

Active since 2015

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Obtain every possible combination in array
Here's a brute force generation of all combinations. Memory usage is more of a bottleneck than processing time, so I wrote it wi...

7 years ago | 0

Answered
Array manipulation: Suppose you have an array.How to take windows with overlapping along column and repeat to next doing same
Indexing and stacking as shown below will work for your example. Does this work for your real use case also? a = [1 2 3 4 5;...

8 years ago | 0

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Answered
Using strcmp on multiple strings to get a logical array
There's really nothing wrong with a for loop in this case. However, cellfun is probably what you're looking for: Event = {'a...

8 years ago | 3

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Answered
performance when copying data from object array to cell
Darim, Since you are not pre-allocating the *data* cell, Matlab is probably expanding the size of *data* iteratively. With pr...

8 years ago | 0

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Re-synchronizing TEXTSCAN
dpb, I made a generalized solution to this problem some time ago for the constant questions about parsing delimited text file...

8 years ago | 0

Answered
How do I play sound when a key is pressed
Michael, This article describes how to record and play sound. https://www.mathworks.com/help/matlab/import_export/record-...

8 years ago | 0

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Answered
How to have MATLAB 2016 Legend without box and as transparent?
SL, Check out the Matlab documentation on the legend function. Special arguments can be passed in as name value pairs when cr...

8 years ago | 0

Answered
How to round a result to two decimal places
Mo'men, Check out the round function. r_rounded = round(r,2); % rounds to 2 decimal places Hope this helps.

8 years ago | 22

Answered
How to save an image using imwrite with a filename from a variable
Hi Nalini, You can combine string values using square brackets. The syntax for imwrite using your variable names is as follow...

8 years ago | 3

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Answered
Write a function called mystaff that takes one input matrix called S. S is an n-by-m matrix whose elements are salaries. Salaries.xlsx Doesn't return a value How do I use my function to find average salary of principe: principle >= 140000.
Khalid, I suspect you are pressing the "Run" button with your function file open. Your function needs to return the final...

8 years ago | 0

Answered
How can I change the number of MinorTicks between MajorTicks?
Hi Geovana, I think your questions is answered here: <https://www.mathworks.com/matlabcentral/answers/102945-how-can-i-speci...

8 years ago | 0

Answered
Extract matrix subset based on latitude and longitude
Janet, These conditions are contradictory: all_time(:,1)<27.5 & all_time(:,1)>28.0 None of your values could be below...

8 years ago | 0

Answered
Storing and accessing large amounts of time-based data
Hi Ben, You have discussed your ideas and questions regarding the Matlab data structures that allow for easy access and manip...

8 years ago | 2

Answered
Sum of array items into another array
Assuming data is a struct with fields speed1, speed2, etc. sumArray = structfun(@sum,data);

8 years ago | 3

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Answered
Error when running deployed stand-alone application that uses mex files for c++ code
That error is thrown because the <http://www.mathworks.com/help/matlab/ref/mex.html mex> command attempts to compile a c++ file ...

8 years ago | 1

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Solved

Increment a number, given its digits
Take as input an array of digits (e.g. x = [1 2 3]) and output an array of digits that is that number "incremented" properly, (i...

8 years ago

Solved

Check if sorted
Check if sorted. Example: Input x = [1 2 0] Output y is 0

8 years 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...

8 years ago

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...

8 years ago

Solved

Triangle sequence
A sequence of triangles is constructed in the following way: 1) the first triangle is Pythagoras' 3-4-5 triangle 2) the s...

8 years ago

Solved

Side of an equilateral triangle
If an equilateral triangle has area A, then what is the length of each of its sides, x? <<http://upload.wikimedia.org/wikipe...

8 years 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...

8 years ago

Solved

Area of an equilateral triangle
Calculate the area of an equilateral triangle of side x. <<http://upload.wikimedia.org/wikipedia/commons/e/e0/Equilateral-tr...

8 years 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...

8 years 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...

8 years 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...

8 years ago

Solved

Length of the hypotenuse
Given short sides of lengths a and b, calculate the length c of the hypotenuse of the right-angled triangle. <<http://upload....

8 years 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...

8 years ago

Solved

How long is the longest prime diagonal?
Stanislaw Ulam once observed that if the counting numbers are <http://en.wikipedia.org/wiki/Ulam_spiral arranged in a spiral>, t...

8 years ago

Solved

Find the biggest empty box
You are given a matrix that contains only ones and zeros. Think of the ones as columns in an otherwise empty floor plan. You wan...

8 years ago

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