擅长:python、mysql、java
<p>尝试<code>scipy.signal.lfiltic(b, a, y, x=None)</code>获得初始条件。在</p>
<p><code>lfiltic</code>的文档文本:</p>
<pre><code>Given a linear filter (b,a) and initial conditions on the output y
and the input x, return the inital conditions on the state vector zi
which is used by lfilter to generate the output given the input.
If M=len(b)-1 and N=len(a)-1. Then, the initial conditions are given
in the vectors x and y as
x = {x[-1],x[-2],...,x[-M]}
y = {y[-1],y[-2],...,y[-N]}
If x is not given, its inital conditions are assumed zero.
If either vector is too short, then zeros are added
to achieve the proper length.
The output vector zi contains
zi = {z_0[-1], z_1[-1], ..., z_K-1[-1]} where K=max(M,N).
</code></pre>