matlab problem

2011 5 19
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hello iam new in matlab i have this question: i have ths code to calculate the error between two curves :
function b = fonct(lam)
global Uexp RFexp
%lecture des données expérimentaux
fid =fopen('données expérimentaux.m','r');
M = fscanf(fid,'%e',[1,1]);
xy=fscanf(fid,'%e%e',[2,M]);
xy1=xy';
Uexp=xy1(:,1); %vesteur colonne U2- déplacement
RFexp=xy1(:,2); %vecteur colonne RF2- réaction
mef(lam);
rf4;
Fint=interp1(Uexp,RFexp,-c(:,3),'spline');
b=0;
for i=1:108
X=Fint((i)-RFexp(i)).^2
b=b+X
end
b after runnig it give me this error:
??? Attempted to access Fint(1.99984); index must be a positive integer or logical.
Error in ==> fonct at 16 X=Fint((i)-RFexp(i)).^2 can anyone help me thanks a lot

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 采纳的回答

Franck Dernoncourt
Franck Dernoncourt 2011-5-19

0 个投票

You probably meant "X=(Fint(i)-RFexp(i)).^2".

更多回答（2 个）

AMAL OUNARA
AMAL OUNARA 2011-5-19

0 个投票

thanks a lottttttttt it really works now wonderful
good luck
AMAL OUNARA
AMAL OUNARA 2011-5-19

0 个投票

hi i have also the same problem when i ake this code : function b = fonct(lam)
global Uexp RFexp
%lecture des données expérimentaux
fid =fopen('données expérimentaux.m','r');
M = fscanf(fid,'%e',[1,1]);
xy=fscanf(fid,'%e%e',[2,M]);
xy1=xy';
Uexp=xy1(:,1); %vesteur colonne U2- déplacement
RFexp=xy1(:,2); %vecteur colonne RF2- réaction
mef(lam);
rf4;
Fint=interp1(Uexp,RFexp,-c(:,3),'spline');
Fsim= - c(:,5);
b=0;
for i=1:45
X=(Fint(i)-Fsim(i)).^2;
b=b+X
end
b
both Fint and Fsim are arrays contains 45 value but the error is :
??? Attempted to access Fint(42); index out of bounds because numel(Fint)=41.
Error in ==> fonct at 17
X=(Fint(i)-Fsim(i)).^2;
what shall i do please ????

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