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perfectpf123

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[ÇóÖú] matlabÅ£¶Ù·¨ÇóÖú£¬matlabÐÂÊÖ£¬×î½ü¼ÆËã·½·¨ÀÏʦ²¼ÖõĴó×÷Òµ»¹Âé·³´óÉñÍûÒ»Íû

function f=fun(x)    %Ïȶ¨ÒåÁËÒ»¸öfunº¯Êý
f=exp(x)-1

end
----------------------------------------------
function m=newton(a,d,max)     %ÕâÊÇÖ÷º¯Êý
x(0)=a;
for k=0:max
    f(x(k))=fun(x(k));y(x(k))=diff(fun(x(k)))                    %ÕâÀïÖ±½Óµ÷ÓÃfunº¯ÊýûÎÊÌâ°É
    x(k+1)=x(k)-f(x(k))/y(x(k));                 
    disp(sprintf('%d         %f ',k,x(k)));      
    if abs(x(k+1)-x(k))<d                        
        break
    end         
end
end
----------------------------------------
ÒÔÉÏÊÇÖ÷³ÌÐòÄÚÈÝ£¬ÔËÐÐÖ¸ÁîÊÇ
  m=newton(1,0.0001,30)
È´³öÏÖÒÔÏ´íÎó
Attempted to access x(0); index must be a positive integer or logical.

Error in newton (line 2)
x(0)=a;
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