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Which values occur exactly three times?

Return a list of all values (sorted smallest to largest) that appear exactly three times in the input vector x. So if x = [1 2...

10 months ago

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Simple equation: Annual salary

Given an hourly wage, compute an annual salary by multiplying the wage times 40 and times 50, because salary = wage x 40 hours/w...

10 months ago

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Return the largest number that is adjacent to a zero

This example comes from Steve Eddins' blog: <http://blogs.mathworks.com/steve/2009/05/27/learning-lessons-from-a-one-liner/ Lear...

11 months ago

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Remove all the consonants

Remove all the consonants in the given phrase. Example: Input s1 = 'Jack and Jill went up the hill'; Output s2 is 'a ...

11 months ago

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Circle/Pentagon Overlap

Your function will be provided with the five vertices of a pentagon (p) as well as the center point (cp) and radius (r) of a cir...

12 months ago

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Missing five

Convert decimal numbers to a base-9 notation missing the digit *5* <<http://www.alfnie.com/software/missing5.jpg>> Too man...

1 year ago

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Convert from Base 10 to base 5

Convert the input number from base 10 into base 5: for example: if a(in base 10)= 5 then a(in base 5)= 10

1 year ago

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Mid-term report

You just got your mid-term report, but it's full of ones and twos :(. So before you give it to your parents, you change it, in o...

1 year ago

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Problem for beginners

M is a nxm matrix. Swap the fist and the second last column with eachother. X=[1 2 3;4 5 6;7 8 9] Y=[2 1 3;5 4 6;8 7 9]

1 year ago

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Stairs

Make an n by n matrix, where the elements are ones and zeros. In the main diagonal, and under that, there should be only ones (...

1 year ago

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Problem for beginners

Suppose that x is a column vector, with at least a length of 6. Delete the 2., 6., and the second last row. Example: X=[1;2;3...

1 year ago

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Simple Matrix

Make the following matrix without typing it in one by one. [1 2 3; 2 4 6; 4 8 12] x=[1 2 3].

1 year ago

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Square root

Given x (a matrix), give back another matrix, where all the elements are the square roots of x's elements.

1 year ago

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Specific Element Count

Given a vector _v_ and a element _e_, return the number of occurrences of _e_ in _v_. Note: NaNs are equal and there may be n...

1 year ago

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Create logical matrix with a specific row and column sums

Given two numbers *|n|* and *|s|*, build an |n-by-n| logical matrix (of only zeros and ones), such that both the row sums and th...

1 year ago

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Getting the indices from a matrice

Getting the indices from a matrice. Inspired by Problem 645. Getting the indices from a vector by the great Doug Hull. Given a...

1 year ago

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Return elements unique to either input

Given two numeric inputs a and b, return a row vector that contains the numbers found in only a or only b, but not both. For ex...

1 year ago

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Fill a zeros matrix

The aim is to fill an array of all zeros given a numerical value and the index of row and columns for this value. 3 Inputs: ...

1 year ago

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Set the array elements whose value is 13 to 0

Input A either an array or a vector (which can be empty) Output B will be the same size as A . All elements of A equal to 13...

1 year ago

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Generate N equally spaced intervals between -L and L

Given N and L, return a list of numbers (in ascending order) that divides the interval [-L L] into N equal-length segments. F...

1 year ago

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Words Count: A Cell Array Approach

Given an input character vector consisting of words, punctuation marks, white spaces, and possibly newline characters (\n), arra...

1 year ago

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Words Count: A String Array Approach

Given an input character vector consisting of words, punctuation marks, white spaces, and possibly newline characters (\n), arra...

1 year ago

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String Array Basics, Part 4: Convert String Array with Missing Values to Cell Array

<http://www.mathworks.com/help/matlab/characters-and-strings.html String array> and cell array are two types of containers for s...

1 year ago

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String Array Basics, Part 3: Convert Cell Array with Missing Values to String Array

<http://www.mathworks.com/help/matlab/characters-and-strings.html String array> and cell array are two types of containers for s...

1 year ago