function a=new(c,k)' t: S+ [& h/ |( R [x,y]=size(c);4 e0 Z5 w% O8 p ^ b=zeros(x,2+k); for i=1:x for j=1:2 b(i,j)=c(i,j);4 J& d+ E# o8 r5 k end; q) Q# d7 B; f9 D3 A end for j=3:2+k7 P6 q: N5 _# f- } for i=j-1:x/ ?/ x# [& P# u/ P/ ^; w+ g b(i,j)=(b(i,j-1)-b(i-1,j-1))/(b(i,1)-b(i-j+2,1));+ U& ?% @; X, B; I end end+ H1 w J4 m2 q: X) `, z a=b
function fx=newton(c,x,k)) H9 f5 @8 l# A/ L( {9 Y2 r. |* R b=new(c,k); [p,q]=size(b);* a* `! I1 u" I - q% n: @8 o3 K { fx=0; 4 S. V, @' a( S1 {1 ^' I2 k U for i=1:p1 S5 ]' }+ D6 T7 V t=b(i,i+1) for j=1:i-1" @- Q3 p6 e5 m2 r9 g t=t*(x-b(i-1,1));+ L6 \* j& ~( k# C/ b end, Y' ]; a9 h; s+ d) r8 V) \ fx=fx+t;; m, ?; ]% H" t$ E' g( o% t' T$ p end* w2 b- B) N& k2 E7 J fx

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