# Plotting the element of a 3D array

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Yokuna il 11 Nov 2022
Risposto: Walter Roberson il 11 Nov 2022
The dimension of F is 2x2x145 (3D array), i.e. we have 145 number of 2x2 matrices. Now I want to find a vector having the (1,1)th element of all the matrices. How to obtain such vector having the (1,1)th element of all the matrices and then plot it with respect to time (T)?
M1 = [2 0;0 2];
odefun = @(t,y) part_a(t,y,M1);
[T,F] = ode45(odefun,[10 0],[2 0;0 2]);
F = reshape(F.',2,2,[]);
plot(T,F(1,1,:))
Error using plot
Data cannot have more than 2 dimensions.
function dy = part_a(t,y,M1)
F = reshape(y,size(M1));
FA = -M1*F;
dy = FA(:);
end
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### Risposta accettata

Walter Roberson il 11 Nov 2022
plot(T, squeeze(F(1,1,:)))
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