# How to store Values in a Loop?

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naresh bhimchand on 11 Nov 2019
Commented: naresh bhimchand on 12 Nov 2019
for t=0:1:10
L(t) = 3*cos(t);
M(t) = diag([L 5*cos(t) 7*cos(t)]);
K(t) = [12e5*cos(t) 18e5*cos(t) 34e5*cos(t);18e5*cos(t) 15e5*cos(t) 12e5*cos(t);13e5*cos(t) 12e5*cos(t) 22e5*cos(t)];
[X,e] = polyeig(K, M)
o = sqrt(e);
fprintf('the freqeuncy is"%d" \n',o)
writematrix(o,'hello/tt.xlsx','sheet',1,'range','A1:A30');
end
Hi, From the above code I am trying to store 10 time series in a single excel file but I can't able to do it and getting a error like "Array indices must be positive integers or logical values". Can anyone please help me in this.
naresh bhimchand on 12 Nov 2019
ok bro thank you very much

David Hill on 12 Nov 2019
for t=0:10
L = 3*cos(t);
M = diag([L 5*cos(t) 7*cos(t)]);
K = [12e5*cos(t) 18e5*cos(t) 34e5*cos(t);18e5*cos(t) 15e5*cos(t) 12e5*cos(t);13e5*cos(t) 12e5*cos(t) 22e5*cos(t)];
[X,e] = polyeig(K, M)%X is a 3x3 matrix, e is 3x1 vector
o(:,t+1) = sqrt(e);%o is a 3x11 matrix when the loop finishes
end
writematrix(o,'hello/tt.xlsx','sheet',1,'range','A1:A30');
The only thing you are writing to file is the variable o; therefore it is the only thing needing to be in an array.
naresh bhimchand on 12 Nov 2019
I got it, bro.Thanks :)