Get the value of Y at a horizontal asymptote.
int ocmath_yatasymt( UINT nSize, const double * px, const double * py, double * dYAsympt )
Return OE_NOERROR if success.
EX1
void ocmath_yatasymt_ex1() { double dYAsympt; vector vx, vy; //******* Create sample data ***************** vx.SetSize(13); vy.SetSize(13); vx[0]=-20; vy[0]=-3.04762; vx[1]=-14; vy[1]=-3.06667; vx[2]=-8; vy[2]=-3.11111; vx[3]=-2; vy[3]=-3.33333; vx[4]=-1; vy[4]=-3.5; vx[5]=0; vy[5]=-4; vx[6]=1; vy[6]=NANUM; vx[7]=2; vy[7]=-2; vx[8]=3; vy[8]=-2.5; vx[9]=4; vy[9]=-2.66667; vx[10]=10; vy[10]=-2.88889; vx[11]=16; vy[11]=-2.93333; vx[12]=22; vy[12]=-2.95238; //******** End of Sample Data Creation ******* int nRet = ocmath_yatasymt(vx.GetSize(), vx, vy, &dYAsympt); if(nRet != OE_NOERROR) { printf("Error in computing the horizontal asymptote of X\n.") } printf("The value of Y at the horizontal asymptote of X = %f\n", dYAsympt); }
The function used for fitting function parameter initialization.
Get the value of Y at a horizontal asymptote. If the asymptote has two branches then Y is defined as Y = (yatxmax+yatxmin)/2 and if the asymptote has a single branch then Y is defined as either yatxmax or yatxmin depending on where the slope of the curve is closest to zero.
ocmath_xatasymt
origin.h