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Back to Basics - Find no. of elements in a matrix?

Let A be a m*n matrix. Find the total no. of elements in A ? (Hint - formula based) A = [1 2 3;4 5 6]; output = 6

5 years ago

Problem

Back to Basics - Find no. of elements in a matrix?

Let A be a m*n matrix. Find the total no. of elements in A ? (Hint - formula based) A = [1 2 3;4 5 6]; output = 6

5 years ago | 1 | 220 solvers

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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...

5 years ago

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Scoring for oriented dominoes

Given a list of ordered pairs, and the order they should be placed in a line, find the sum of the absolute values of the differe...

5 years ago

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Multielement indexing of a row array

The row array birthRateChina stores the China birth rate (per 1000 people) for years 2000 to 2012. Write a statement that create...

5 years ago

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Replace NaNs with the number that appears to its left in the row.

Replace NaNs with the number that appears to its left in the row. If there are more than one consecutive NaNs, they should all ...

5 years ago

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Project Euler: Problem 1, Multiples of 3 and 5

If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23...

5 years ago

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radius of a spherical planet

you just measured its surface area, that is the input.

5 years ago

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Too mean-spirited

Find the mean of each consecutive pair of numbers in the input row vector. For example, x=[1 2 3] ----> y = [1.5 2.5] x=[1...

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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...

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Remove the vowels

Remove all the vowels in the given phrase. Example: Input s1 = 'Jack and Jill went up the hill' Output s2 is 'Jck nd Jll wn...

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Back to basics 11 - Max Integer

Covering some basic topics I haven't seen elsewhere on Cody. Return the largest positive integer MATLAB can handle.

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Back to basics 22 - Rotate a matrix

Covering some basic topics I haven't seen elsewhere on Cody. Rotate the input matrix 90 degrees counterclockwise (e.g. [1 2; ...

5 years ago

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Back to basics 8 - Matrix Diagonals

Covering some basic topics I haven't seen elsewhere on Cody. Given an input vector of numbers, output a square array with the...

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Find the sum of the elements in the "second" diagonal

Find the sum of the elements in the diagonal that starts at the top-right corner and ends at the bottom-left corner.

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Sum of diagonal of a square matrix

If x = [1 2 4; 3 4 5; 5 6 7] then y should be the sum of the diagonals of the matrix y = 1 + 4 + 7 = 12

5 years 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...

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Summing digits

Given n, find the sum of the digits that make up 2^n. Example: Input n = 7 Output b = 11 since 2^7 = 128, and 1 + ...

5 years ago

Question

how can i find the gcd using Euclid

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5 years ago | 1 answer | 0

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Find the alphabetic word product

If the input string s is a word like 'hello', then the output word product p is a number based on the correspondence a=1, b=2, ....

5 years ago

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Bullseye Matrix

Given n (always odd), return output a that has concentric rings of the numbers 1 through (n+1)/2 around the center point. Exampl...

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Remove any row in which a NaN appears

Given the matrix A, return B in which all the rows that have one or more <http://www.mathworks.com/help/techdoc/ref/nan.html NaN...

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The Hitchhiker's Guide to MATLAB

Output logical "true" if the input is the answer to life, the universe and everything. Otherwise, output logical "false".

5 years ago

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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...

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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...

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Check if number exists in vector

Return 1 if number _a_ exists in vector _b_ otherwise return 0. a = 3; b = [1,2,4]; Returns 0. a = 3; b = [1,...

5 years ago

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Return the first and last character of a string

Return the first and last character of a string, concatenated together. If there is only one character in the string, the functi...

5 years ago

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surface of a spherical planet

you just discovered its circumference, that is the input.

5 years ago

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Right and wrong

Given a vector of lengths [a b c], determines whether a triangle with those sides lengths is a right triangle: <http://en.wikipe...

5 years ago