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acosm

acosm — matrix wise cosine inverse

Calling sequence

t=acosm(x)

Parameters

x : real or complex square matrix
t : real or complex square matrix

Description

t are cosine inverse of the x matrix. Diagonalization method is used. For nonsymmetric matrices result may be inaccurate.One has t=-%i*logm(x+%i*sqrtm(eye()-x*x))

Examples



A=[1,2;3,4];
cosm(acosm(A))

See also

acos, sqrtm, logm
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