Coherence
The coherence of an \(m \times n\) matrix \(A\) can be defined as
\[\| \hat A^H \hat A - I \|_{\text{max}},\]
where \(\hat A\) is formed by normalizing each column of \(A\) to
have a unit Euclidean norm.
C++ API
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Base<F>
Coherence(const Matrix<F> &A)
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Base<F>
Coherence(const ElementalMatrix<F> &A)
C API
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ElError
ElCoherence_s(ElConstMatrix_s A, float* coherence)
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ElError
ElCoherence_d(ElConstMatrix_d A, double* coherence)
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ElError
ElCoherence_c(ElConstMatrix_c A, float* coherence)
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ElError
ElCoherence_z(ElConstMatrix_z A, double* coherence)
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ElError
ElCoherence_s(ElConstDistMatrix_s A, float* coherence)
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ElError
ElCoherence_d(ElConstDistMatrix_d A, double* coherence)
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ElError
ElCoherence_c(ElConstDistMatrix_c A, float* coherence)
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ElError
ElCoherence_z(ElConstDistMatrix_z A, double* coherence)