Consider a polygon that is obtained by joining a set of 2D points whose coordinates are stored in matrix P=[x,y]. Write a function that returns Q, reduced P, such that all collinear points are removed but the same polygon is obtained.
good to know the new function fillmissing
Create a square matrix of multiples
Duplicate each element of a vector.
Reverse the elements of an array
Non trivial identities - differentiation
Non trivial identities - reshape
A shooting competition
Geometrical meaning of determinant
Performance - summation
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