value_with_derivatives

def value_with_derivatives (   self,   x   ) get the value of the function, and its first & second derivative Parameters: x  the point at which to evaluate the function Returns: (f(x), f'(x), f''(x)) Reimplemented from C2Function. Definition at line 1516 of file C2Functions.py. 01516 : 01517 fhinv=self.fhinv 01518 dx=(x-self.fx1)*fhinv 01519 q1=(x-self.fx0)*(x-self.fx2)*fhinv*fhinv # exactly vanish all bits at both ends 01520 q2=dx*q1 01521 01522 r1=self.fa+self.fb*dx 01523 r2=self.fc+self.fd*dx 01524 r3=self.fe+self.ff*dx 01525 01526 y=self.fy1+dx*r1+q2*r2+q1*q2*r3 01527 01528 q3=3*q1+2 01529 q4=5*q1+4 01530 yprime=(self.fa+2*self.fb*dx+self.fd*q2+r2*q3+self.ff*q1*q2+q1*q4*r3)*fhinv 01531 yprime2=2*(self.fb+self.fd*q3+3*dx*r2+self.ff*q1*q4+r3*(2*dx*(5*q1+2)))*fhinv*fhinv 01532 return y, yprime, yprime2 01533 class C2LHopitalRatio(C2Ratio):

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