static public double log10(double inValue){
  return Math.log(inValue) / Math.log(10.0);
}

static public double log10 ( double inValue ) { return Math . log ( inValue ) / Math . log ( 10.0 ) ; }
a static method that uses the natural log to obtain log to base10 . this is required for the linear autocalibrate but will also be used by a derived class giving a log transformed axis .
