VijaKhara
Guest
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 Posted:
Sat Dec 03, 2005 1:16 am Post subject:
Ask about ploting X(omega) |
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Dear members:
Im my matlab homework, I am required to plot the spectrum of
x[n]=(0.8)^|n-10|
Using fomular I calculate
X(omega)=exp(-j*omega*10)*(1-0.8^n)/(1-2*0.8cos(omega)+0.8^2)
Because when I plot X(omega) , Matlab warns me that it neglects some
imaginary numbers/, I am wondering if it makes sense to plot X(omega)
in matlab or noone does that, they plot abs(X(omega)) and phase of
X(omega) instead.
Thanks |
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Real_McCoy
Guest
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| Posted:
Sat Dec 03, 2005 7:18 am Post subject:
Re: Ask about ploting X(omega) |
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"VijaKhara" <VijaKhara@gmail.com> wrote in message
news:1133564147.461543.239110@g49g2000cwa.googlegroups.com...
| Quote: | Dear members:
Im my matlab homework, I am required to plot the spectrum of
x[n]=(0.8)^|n-10|
Using fomular I calculate
X(omega)=exp(-j*omega*10)*(1-0.8^n)/(1-2*0.8cos(omega)+0.8^2)
Because when I plot X(omega) , Matlab warns me that it neglects some
imaginary numbers/, I am wondering if it makes sense to plot X(omega)
in matlab or noone does that, they plot abs(X(omega)) and phase of
X(omega) instead.
Thanks
Depends if it's the Power spectrum or amplitude spectrum. Eitehr way you |
don't plot the complex form.
You plot abs(X)^2 for Power and abd(X) for amplitude.
McC |
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