LOG2  LOG2 Base-2 Logarithm Function


Usage
 
 Computes the log2 function for its argument.  The general
 syntax for its use is
 
   y = log2(x)
 
 where x is an n-dimensional array of numerical type.
 Integer types are promoted to the double type prior to
 calculation of the log2 function.  Output y is of the
 same size as the input x. For strictly positive, real inputs, 
 the output type is the same as the input.
 For negative and complex arguments, the output is complex.
 