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LOG10 LOG10 Base-10 Logarithm Function

Usage

Computes the log10 function for its argument.  The general
syntax for its use is

  y = log10(x)

where x is an n-dimensional array of numerical type.
Integer types are promoted to the double type prior to
calculation of the log10 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.