LOG10   Common (base 10) logarithm

     B=LOG10(A)

 INPUT
    A   SDDATA object

 OUTPUT
    B   SDDATA object

 DESCRIPTION
 LOG computes base 10 logarithm of data set A. Error is raised if the
 output becomes complex. This assures SDDATA object contains always double
 data type.

 SEE ALSO
 LOG, LOG2