ERROR for Matrix dimensions must agree.

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Coleman
Coleman 2016-2-23
评论： Coleman 2016-2-23
Hello all,
here is my function
function [error] =stress5_function(Ke,n,Sult,u,t,S0,k,m)
pa=0.1013 ;
S3=5 ;
Ei=Ke.*pa.*(S3./pa).^n;
Rf=(S0+k.*exp(-(S3./m)))./(Sult+u.*exp(-(S3./t)));
% z=(σ1-σ3)
z=0:0.0001:5;
Et=Ei.*(1-(Rf.*z)./(S0+k.*exp(-(S3./m))));
Et(Et<0)=0;
x=(z./Et).*100;
A=xlsread('5MPa','A1:A32');
B=A';
C=xlsread('5MPa','B1:B32');
D=C';
startingIndex = find(x==0);
endingIndex = find(x>=16);
desiredX = x(startingIndex:endingIndex);
desiredZ = z(startingIndex:endingIndex);
A1 = trapz(desiredX,desiredZ);
A2= trapz(B,D);
err= ((A1-A2)./A1)*100;
display(err,'error %');
end
when I type stress5_function([1115 1116],[0.3 0.4], [2.7 2.8], [22 23],[1.11 1.8],[2.677 4.462],[30.9 50],[0.97 1.5]) the error occur.
I can do the function with a set of parameter but can't do it with two
Matrix dimensions must agree.
Error in stress5_function (line 9)
Et=Ei.*(1-(Rf.*z)./(S0+k.*exp(-(S3./m))));
Can anyone please help !!! Thanks a lot!!!!

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采纳的回答

Robert
Robert 2016-2-23
Your variable z is not the same size as Rf, which matches the size of your inputs. The element-wise multiplication is happy to expand your scalars when you multiply by z but cannot do the same when you input vectors.

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