NCBI C++ ToolKit

#include <common/ncbi_export.h>
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Functions  
double  NCBI_Erf (double x) 
The error function of x: the integral from 0 to x of e(t*t) dt, scaled by 2/sqrt(pi) to fall within the range (1,1). More...  
double  NCBI_ErfC (double x) 
The complementary error function of x: 1  erf(x), but calculated more accurately for large x (where erf(x) approaches unity). More...  