MATLAB COMPILER RELEASE NOTES User's Guide download pdf (Page 605)

100

101

Mathematics

21-15

Mathematics

New Functions

Function Description

amd Interface to the amd algorithm. This interface is similar to that

used in symamd, but is typically faster than symamd.

bvpxtend Forms a guess structure for extending the boundary value

problem solution

ldl Full ldl factorization and solving for Hermitian matrices

max and min Now Use Magnitudes and Phase Angle for Complex Input

For complex input, min and max are computed using the magnitude, min(abs(x)) and

max(abs(x)) respectively. In the case of equal magnitude elements, the phase angle,

min(angle(x)) and max(angle(x)), is now used.

Compatibility Considerations

In previous versions, min and max were computed using the magnitude, and in the

case of equal magnitude elements, the first element was used. This behavior was

indeterministic and not consistent with the sort function.

Code in previous releases that relied on the output of this functionality for the case

described above should be updated.

Additional Output from lu

The lu function returns an additional output that helps improve numerical stability of

sparse lu factorization.

Upper and Lower Factors for chol and ldl

Upper and lower triangular factors for chol and ldl improve performance for sparse chol.

Referencing the lower triangle and returning the lower triangular factor is more memory

efficient in the case of sparse chol.

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