# adir weiser

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Question

how can i count a cell in a randi vector

hi, i have a randi vector like: randi(4,1,50). and i need to count who much time the number '1' appear in my vector. as well t...

6 years ago | 1 answer | 0

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Reverse the elements of an array

Reverse the order of elements in an array: eg: input X = [ 1 2 3 ; 4 5 6 ; 7 8 9 ] o...

6 years ago

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surrounded matrix

With a given matrix A (size m x n) create a matrix B (size m+2 x n+2) so that the matrix A is surrounded by ones: A = [1 2 ...

6 years ago

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Write a function man that takes a row vector v and returns a matrix H as follows..

Write a function called man that takes a row vector v as an input and returns a matrix H whose first column consist of the eleme...

6 years ago

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How many days in a month?

Return the number of days in a given month in 2017. If the input is not a valid month number, return -1. Examples: Input...

6 years ago

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Find the largest number

Given a vector v with 4 elements, find the largest number x. Example: Input: v = [4 7 1 6]; Output: x = 7; You mu...

6 years ago

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Back to basics 21 - Matrix replicating

Covering some basic topics I haven't seen elsewhere on Cody. Given an input matrix, generate an output matrix that consists o...

6 years ago

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Sum of adjacent elements in a vector

Given a vector v, return a vector s containting the sum of every two adjacent elements in the vector. Every element s(i) cont...

6 years ago

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Horizontal matrix sort

Given a matrix x with n rows and m columns, return a matrix y with n rows and 2m columns, such that every row in x is sorted fro...

6 years ago

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Vertical matrix sort

Given a matrix x with n rows and m columns, return a matrix y with 2n rows and m columns, such that every column in x is sorted ...

6 years ago

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Remove the first, third and fifth rows of a matrix

Given a matrix x with at least five rows, return a matrix y that includes all rows of x except for th 1st, the 3rd and 5th. E...

6 years ago