Hello my dear,How can I write this error? Thank all.

Hello all,

How can I write this error? I have some error this program. Please help me. Thank all. Program is below. If you can, please write to this.

for t=1:N

if(t<y)

vm=vm2(t);

else

vm=440*sqrt(2)/sqrt(3);

end

va(t)=vm*sin(2*pi*60*t*dt);

vb(t)=vm*sin(2*pi*60*t*dt-(2*pi)/3);

vc(t)=vm*sin(2*pi*60*t*dt+(2*pi)/3);

end

Error is-

Answer 1

[Adam Danz]

These aren't errors. They are warnings. Your variables isq, isd, frq, frd and wr are created within a loop and on each iteration of the loop, their size changes. Instead, you want to allocate the variables before the loop. Here's an example:

I don't know if these variables are vectors, matrices, numeric, cell arrays, etc.

n=12;
isq = zeros(1,n);  % <- allocate a numeric vector

for i = 1:n
    isq(i) = rand(1);
end

Here are more allocation examples.

isq = cell(1,n); % <- cell array, empties 
isq = nan(n,3);  % <- n x 3 matrix, NaNs