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scilab 2.6-4
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logm             Scilab Group             Scilab Function              logm
NAME
   logm - square matrix logarithm
  
CALLING SEQUENCE
 y=logm(x)
PARAMETERS
 x          : square matrix
            
DESCRIPTION
    logm(x) is the matrix logarithm of x. The result is complex if x is not
  positive or definite positive. If x is a  symmetric matrix, then
  calculation is made by schur form. Otherwise, x is assumed
  diagonalizable. One has expm(logm(x))=x 
  
EXAMPLE
 A=[1,2;3,4];
 logm(A)
 expm(logm(A))
 A1=A*A';
 logm(A1)
 expm(logm(A1))
 A1(1,1)=%i;
 expm(logm(A1))
SEE ALSO
   expm, log