Generate vector of cumulative mutual coherence of a given matrix up to a given order. \
Mutual Cumulative Coherence of a Matrix A at order k is defined as
* M(A, k) = max_{p} max_{p \ne q, q \in Ω } ∑_{q} | <a_{p}, a_{q}> | / ( |a_{p}| |a_{q}|)*

1 | ```
mutualCoherence(A, k)
``` |

`A` |
A matrix. |

`k` |
Integer value determines number of columns or the order of mutual coherence function to . |

Returns k-vector

Mehmet Suzen

Compressed sensing in diffuse optical tomography \ M. Suzen, A.Giannoula and T. Durduran, \ Opt. Express 18, 23676-23690 (2010) \ J. A. Tropp \ Greed is good: algorithmic results for sparse approximation, \IEEE Trans. Inf. Theory 50, 2231-2242 (2004)

1 2 3 | ```
set.seed(42)
B <- matrix(rnorm(100), 10, 10) # Gaussian Random Matrix
mutualCoherence(B, 3) # mutual coherence up to order k
``` |

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