Dear R users,

Has anyone implemented a "matrix log" function in R similar to the 
function logm() in Matlab?  I did a quick R site search and browsed the 
contributed packages to no avail.

The octave function is far too simplistic and fails for the Matlab test 
matrix.  Ideally, the code of Cheng, Higham, and Laub (2001) or something 
similar could be utilized.  Just checking before I spend time porting 
code.

cheers...

Brandon

Translational Medicine & Genetics
GlaxoSmithKline
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