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Hello I would to figure out how to add poles into matrix from a for loop

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Trevon Alvarado
Trevon Alvarado on 30 Apr 2020
Answered: Sai Sri Pathuri on 4 May 2020
I am designing a band pass filter and I need to take the roots of the low pass filter roots and store them. Can you please help me with this.
sp2 = roots(Gain_den);
sp = sp2(real(sp2)<0)
%sp=[1.0000 + 0.0000i -0.2471 - 0.9660i 1.0000 + 0.0000i]
for k = 1:N_Stages
poles=[1 sp(k) 1]
p1=roots(poles)
end
I had an idea coding it like this:
sp2 = roots(Gain_den);
sp = sp2(real(sp2)<0)
%sp=[1.0000 + 0.0000i -0.2471 - 0.9660i 1.0000 + 0.0000i]
for k = 1:N_Stages
poles(k)=[1 sp(k) 1]
p1=roots(poles(k))
end
I had gotten this error when attempting to do it this way.
Unable to perform assignment because the left and right sides have a different number
of elements.
  1 Comment
darova
darova on 30 Apr 2020
You want to assign 3 values
It's impossible poles(k) has only 1 place ( for one value )

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Answers (1)

Sai Sri Pathuri
Sai Sri Pathuri on 4 May 2020
In the code,
poles(k)=[1 sp(k) 1]
you are assigning a row vector of size 1x3 to poles(k) with size 1x1. The error is due to mismatch between sizes.

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