matlab problem

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

Answer 1

[Franck Dernoncourt]

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

Answer 2

[AMAL OUNARA]

thanks a lottttttttt it really works now wonderful

good luck

Answer 3

[AMAL OUNARA]

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 ????