Calculate the mean of each half of a matrix
Given a matrix with an even number of columns, n, return a 1-by-2 row vector where the first element is the mean of all the elem...
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Find Closest Constant
Given a number x, return the value that is closest to x from this list of constants: 0, 1, , e, , (also known as ).
For exampl...
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Matrix Quadrants
Write a function that takes N as the input, and outputs a matrix whose upper-left (NxN) quadrant contains all ones, the lower-ri...
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Projector Matrix
Write a function to determine whether or not the matrix is a projector. Projector matrices are defined as P^2 = P.
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Nilpotent matrix
Check if matrix A is
<http://mathworks.com/ nilpotent>.
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Orthonormal matrix
You decide whether any given matrix is an orthonormal matrix or not.
If each column in a matrix is perpendicular to the other...
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Is this matrix orthogonal?
Given a square matrix, a, determine whether it is orthogonal.
INPUT: a, a n x n matrix
OUTPUT: true or false
Outer product of multiple vectors
In tensor algebra, it is often useful to define a tensor as a product of lower order tensors. Similarly, a multidimensional arra...
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Combined Ages 2 - Symmetric, n ≥ 3
Following on <http://www.mathworks.com/matlabcentral/cody/problems/42382-combined-ages-1-symmetric-n-3 Combined Ages 2>, you wil...
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Combined Ages 1 - Symmetric, n = 3
You have probably seen the common riddle wherein combined ages are provided and you must determine the individual ages. For exam...
linear least squares fitting
Inputs:
* |f|: cell-array of function handles
* |x|: column vector of |x| values
* |y|: column vector of |y| values, same l...
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System of equations
Find a solution to a system of equations represented by a |n| by |n+1| matrix. For instance,
[ 2 0 4; => 2*x = 4
...
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Column norms of a matrix
Given a matrix M, return a vector y such that for each k
y(k)=norm(M(:,k))
(y(k) is the Euclidean norm of the k-th col...
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Times 2 - START HERE
Try out this test problem first.
Given the variable x as your input, multiply it by two and put the result in y.
Examples:...