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"Index exceeds the number of array elements (11)."

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James Perkins
James Perkins 2019-10-14
评论： James Perkins 2019-10-14
Hi, Im pretty new to MATLAB and have come across this issue. Every time i run the script i get a message saying "Index exceeds the number of array elements (11).". Please could someone help?
disp = ('RLC Circuit')
R = input('R = ');
L = input('L = ');
C = input('C = ');
a = L*C;
b = R*C;
c = 1;
D = (b^2)-(4*a*c)
S1 = -b+(sqrt(D))/(2*a)
S2 = -b-(sqrt(D))/(2*a)
if D>0
disp('Over Damped')
elseif D==0
disp('Critically Damped')
else
disp('Under Damped')
end

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Guillaume
Guillaume 2019-10-14
You create a variable called disp:
disp = 'RLC Circuit' %removed brackets which didn't anything
Which shadows the built-in disp function. From then on:
disp('something')
index into this disp variable instead of calling the disp function. This variable has indeed only 11 elements, whereas
disp('Over')
tries to access elements 79, 118, 101, 114 (the character values of 'Over').
Morale of the story: don't use the names of matlab function as variable names. Other common culprits are sum, mean, max, and min.

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