Introduction - If you have any usage issues, please Google them yourself
x = CoSaMP( A, b, k )
uses the Compressive Sampling Matched Pursuit (CoSaMP) algorithm
(see Needell and Tropp s 2008 paper http://arxiv.org/abs/0803.2392 )
to estimate the solution to the equation
b = A*x (or b = A*x+ noise )
where there is prior information that x is sparse.z