erf and erfc implementation by Gregory LEGRAIN

CCMAIL: gregory.legrain@crans.org

svn path=/trunk/KDE/kdeedu/kmplot/; revision=877564

kmplot/parser.cpp

@@ -105,6 +105,8 @@ ScalarFunction Parser::scalarFunctions[ ScalarCount ]=
 	{"gamma", 0, tgamma},			// gamma function
 	{"lgamma", 0, lgamma},			// log-gamma function
 	{"factorial", 0, factorial},		// factorial
+	{"erfc", 0, lerfc},			// error function
+	{"erf", 0, lerf},			// complementary error function
 	
 	// legendre
 	{"P_0", 0, legendre0},				// lengedre polynomial (n=0)
@@ -1415,6 +1417,15 @@ double mod( const Vector & args )
 	
 	return std::sqrt( squared );
 }
+
+double lerf(double x) {
+	return erf(x);
+}
+
+double lerfc(double x) {
+	return erfc(x);
+}
+
 //END predefined mathematical functions
 
 

kmplot/parser.h

@@ -85,7 +85,7 @@ enum Token
 
 
 const int legendreCount = 7; // number of legendre polynomials we allow for
-const int ScalarCount = 38+legendreCount;	// number of mathematical scalar functions
+const int ScalarCount = 40+legendreCount;	// number of mathematical scalar functions
 const int VectorCount = 3; // number of vector functions
 //@}
 
@@ -126,6 +126,8 @@ double legendre5(double x);
 double legendre6(double x);
 
 double factorial(double x);
+double lerf(double x);
+double lerfc(double x);
 
 /** Predefined mathematical functions with an indefinite number of variables. */
 double min( const Vector & x );