ellip(signal)
ellip()所属R语言包:signal
Elliptic or Cauer filter
椭圆形或考尔过滤器
译者:生物统计家园网 机器人LoveR
描述----------Description----------
Generate an Elliptic or Cauer filter (discrete and continuous).
生成一个椭圆形或考尔过滤器(离散和连续)。
用法----------Usage----------
## Default S3 method:[默认方法]
ellip(n, Rp, Rs, W, type = c("low", "high", "stop",
"pass"), plane = c("z", "s"), ...)
## S3 method for class 'FilterOfOrder'
ellip(n, Rp = n$Rp, Rs = n$Rs, W = n$Wc, type = n$type, ...)
参数----------Arguments----------
参数:n
filter order or generic filter model
滤波器的阶数或一般的过滤器模型
参数:Rp
dB of pass band ripple
dB的通带纹波
参数:Rs
dB of stop band ripple
dB的阻带纹波
参数:W
critical frequencies of the filter. W must be a scalar for low-pass and high-pass filters, and W must be a two-element vector c(low, high) specifying the lower and upper bands. For digital filters, W must be between 0 and 1 where 1 is the Nyquist frequency.
临界频率的过滤器。 W必须是一个标量的低通和高通滤波器,并W必须是一个两元素矢量c(low, high)指定的下限和上限的频带。对于数字滤波器,W必须是0和1,其中1是奈奎斯特频率之间。
参数:type
Filter type, one of "low" for a low-pass filter, "high" for a high-pass filter, "stop" for a stop-band (band-reject) filter, or "pass" for a pass-band filter.
的过滤器类型,其中"low"一个低通滤波器,"high"的高通滤波器,"stop"阻带(带阻)滤波器,或<X >一个带通滤波器。
参数:plane
"z" for a digital filter or "s" for an analog filter.
"z"一个数字滤波器或"s"一个模拟滤波器。
参数:...
additional arguments passed to ellip, overriding those given by n of class FilterOfOrder.
额外的参数传递给ellip,覆盖那些n类FilterOfOrder。
Details
详细信息----------Details----------
Because ellip is generic, it can be extended to accept other inputs, using "ellipord" to generate filter criteria for example.
因为ellip是通用的,可扩展,以接受其他输入,使用"ellipord",例如过滤条件。
值----------Value----------
An Arma object with list elements:
Arma对象列表中的元素:
参数:b
moving average (MA) polynomial coefficients
移动平均线(MA)的多项式系数
参数:a
autoregressive (AR) polynomial coefficients
多项式系数自回归(AR)
(作者)----------Author(s)----------
Original Octave version by Paulo Neis
<a href="mailto:p_neis@yahoo.com.br">p_neis@yahoo.com.br</a>.
Modified by Doug Stewart. Conversion to R by Tom Short.
参考文献----------References----------
Hardcover, 1999.
Digital de Sinais, UFPR, 2001/2002.
参见----------See Also----------
Arma, filter, butter,
Arma,filter,butter,
实例----------Examples----------
# compare the frequency responses of 5th-order Butterworth and elliptic filters.[比较5阶Butterworth及椭圆滤波器的频率响应。]
bf <- butter(5, 0.1)
ef <- ellip(5, 3, 40, 0.1)
bfr <- freqz(bf)
efr <- freqz(ef)
plot(bfr$f, 20 * log10(abs(bfr$h)), type = "l", ylim = c(-50, 0),
xlab = "Frequency, radians", ylab = c("dB"))
lines(efr$f, 20 * log10(abs(efr$h)), col = "red")
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注:
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