function l=fun(n,x,c)" X { I- R4 C- f/ Q* ]5 O/ G l1=1; l2=1;4 `( _/ ^1 W. {& U2 s# V; t for i=1:3 if n~=i / ]$ h8 C# Z2 f+ A# I l1=l1*(x-c(i));+ n3 o8 V% A. B+ \4 V5 Y l2=l2*(c(n)-c(i));: q4 ?) s1 l8 E end end6 A" T) z& J; j1 n l=l1/l2' V: m/ C+ P, q7 Z/ A5 J% c3 i+ ?
function fx=la(x,c,d)7 L0 a0 y2 [7 V! L fx=0;% P& A" T: v. ] for i=1:3 fx=fx+d(i)*fun(i,x,c); end& f" b0 x9 Z8 C1 Z9 v, Y$ P format short, fx
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