06a-NR-Secant_Methods-annotated.pdf

节选段落一：
xold=x0; fold=f(xold); f’old=f’(xold)
Erel=Eabs=large
count = 0
while (|Erel| > tol1 AND |Eabs|>tol2) AND count count=count+1
if f’old=0 STOP→
xnew = xold – fold / f’old
Erel=… ; Eabs=…
xold=xnew; fold=f(xold); f’old=f’(xold)
end
print xnew,f(xnew),count
x
f
MecE390 – Lange
SECANT