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Double the length of the vector

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Half the length of the vector

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Product of elements in a column

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non-repitition of numbers in a vector

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Matrix FUN
Given a Matrix M, find out the number of elements of matrix that are divisible by 3. M = [1 2 3;4 5 6;7 8 9]; ou...

5 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...

5 years ago

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Extra safe primes
Did you know that the number 5 is the first safe prime? A safe prime is a prime number that can be expressed as 2p+1, where p is...

5 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...

5 years ago

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Times 10
Try out this test problem first. Given the variable x as your input, multiply it by ten and put the result in y. Examples:...

5 years ago

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Given a matrix A (size m x n) create a matrix B (size m+2 x n+2) which consists of matrix A surrounded by zeros. See Example below:
A = [1 2 3 4 5 6] ----------- B = [0 0 0 0 0 0 1 2 3 0 0 4 5 6 0 0 0 0 0 0]

5 years ago

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Vector push
Append an element |x| to the end of the vector |v| and return both the extended vector and the new number of its elements. |x| c...

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Product of Each Column
Given a matrix |mat| with |n| columns, return a row vector |v| of length |n|, where every element in |v| is the product of the |...

5 years ago

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Vector pop
Take |n| elements from the end of the vector |v| and return both the shorten vector |v| and the |n| elements in a separate vecto...

5 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...

5 years ago

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How many Integers?
Count the integers in a given vector |v|. You *must* use a loop to count each element separately. Examples: Input: v...

5 years ago

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Diagonal Pattern
For a positive integer |n|, return an |nXn| matrix |mat| such that the value of each element in row |i| and column |j| is given ...

5 years ago

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Given a matrix A return a vector of the product of the elements in each column using a loop without using prod.
--------------------- for m: 3 1 3 3 10 1 9 1 9 4 1 4 5 6 5 ...

5 years ago

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Given a Vector v1, create v2 which is the sum of each two adjacent elements in v1. {length(v2)=length(v1)-1}
if v1 is [1 2 3 4 5 6 7 8] then v2 should be [3 5 7 9 11 13 15]. if v1 is [1; 3; 5; 7] the...

5 years ago

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Find the absolute value of of the array

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Determine if input is a perfect number
A <http://en.wikipedia.org/wiki/Perfect_number/ perfect number> occurs whent the sum of all divisors of a positive integer, exce...

5 years ago

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Remove white spaces at the end of the input string
Remove all trailing white spaces at the end of the input strings

5 years ago

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Basic matlab numeric and string manipulations
If entered input (n) is _numeric_ , compute its *log to the base (n+2)* , if it is a _lower case_ alphabet, *convert it to i...

5 years ago

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prime to each other
Given two integers n1, n2 greater than 1, find out if they have common divisors or are prime to each other. Return "true" if the...

5 years ago

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multiple of nine?
Given a positive number n, return true if n is a multiple of 9 and false if not. Do not make the division and do not use functio...

5 years ago

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Divisible by 9
Pursuant to the <http://www.mathworks.com/matlabcentral/cody/problems/42404-divisible-by-2 first problem> in this series, this o...

5 years ago

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Basic matrix operations using standard MATLAB commands
Create the matrix: 1.0e+15 * 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000...

5 years ago

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Find Index of maximum Value and maximum Value of a vector
Find the Index of the first occurrence of the maximum value in a vector and also the maximum value in the vector. Example: [...

5 years ago

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Given a matrix, return the last eigen value
Given a matrix, return the first eigen value For example: x = magic(5) 17 24 1 8 15 23 5 7 14 ...

5 years ago

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subtract central cross
Given an n-by-n square matrix, where n is an odd number, return the matrix without the central row and the central column.

5 years ago

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Combinations without using nchoosek
You have to generate a matrix with all possible combinations of n elements *taken 2* at a time, *without using nchoosek(1:n,2)* ...

5 years ago