I have the transfer function z+b/z^2-1.5*z+0.7
I want to write this to MATLAB so :
syms b
h=tf([1 b],[1 -1.5 0.7],1)
The problem is that it returns an error of the variable b.
How can I define it so that I can get an answer?
Thank you, you have been very helpful!
One last question: Since t is time I want the erf(t) from 0 to inf
So how the mean and the variance adjust to this?
(mean is 1 and variance is 0?)
So I cannot find the variance without having the probability density function?
Another thought: Can I say from the plot that mean of erf(x) is zero and variance of erf(x) is one??
http://upload.wikimedia.org/wikipedia/commons/2/2f/Error_Function.svg
Sorry, forget about the infinities in the previous post.
So I want to calculate the variance with Variance= E (x^2) - [E(x)]^2
I calculate the μ=E(erf(x))=lim(L->inf)((1/L)*int(a*erf(x),0,L)) = a
So then I want to calculate the E(erf(x)^2) and with the previous type I have an integral of...
Thank you for answering!
So I open the MATLAB to calculate the variance and it seems that there is not a command for the variance of a function.
So I calculate the Variance= E (x^2) - [E(x)]^2
However, when I calculate the E(x^2) = int (x^2*erf^2) MATLAB returns this:
Warning: Explicit...
Homework Statement
It is given a function y(t)=ae(t) where e(t) is the "[URL error function
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I am looking for the variance of this function in an infinite space. Since t is time, I assume that this space is defined as [0,+∞). Thus, the usual variance functions does not apply since...