Compute and return simulated chirp function.
计算并返回模拟啁啾功能的。
译者:生物统计家园网 机器人LoveR
描述----------Description----------
This function computes and returns the coordinates of the reflected simulated chirp function described in Nason and Silverman, 1995. This function is a useful test function for evaluating wavelet shrinkage and time-scale analysis methodology as its frequency changes over time.
该函数计算和利晨和Silverman,1995年中记载的反射的模拟线性调频脉冲函数返回的坐标。此功能是有用的测试,以评估其频率随时间变化的的小波收缩和时间尺度分析方法的功能。
用法----------Usage----------
simchirp(n=1024)
参数----------Arguments----------
参数:n
The number of ordinates from which to sample the chirp signal.
从采样的线性调频脉冲信号的坐标的数目。
Details
详细信息----------Details----------
This function computes and returns the x and y coordinates of the reflected chirp function described in Nason and Silverman, 1995.
该函数计算和返回利晨和Silverman,1995年中记载的反射的线性调频脉冲函数,x和y坐标。
The formula for the reflected simulated chirp is *formula*
模拟啁啾反射的计算公式是公式
The chirp returned is a discrete sample on n equally spaced points between -1 and 1.
返回的啁啾是一个独立的样本n-1和1之间的等距点。
值----------Value----------
A list with two components:
列表两部分组成:
<table summary="R valueblock"> <tr valign="top"><td>x</td> <td> a vector of length n containing the ordered x ordinates of the chirp from -1 to 1.</td></tr> <tr valign="top"><td>y</td> <td> a vector of length n containing the corresponding y ordinates of the chirp.</td></tr> </table>
<table summary="R valueblock"> <tr valign="top"> <TD> x</ TD> <td>一个向量的长度n的啁啾含有有序的x坐标-1到1之间。</ TD> </ TR> <tr valign="top"> <TD>y </ TD> <td>一个向量的长度n包含对应的y坐标的啁啾。</ TD> </ TR> </ TABLE>
RELEASE----------RELEASE----------
Version 3.5.3 Copyright Guy Nason 1994
版本3.5.3版权盖利晨1994年
(作者)----------Author(s)----------
G P Nason
实例----------Examples----------
#[]
# Generate the chirp[产生的啁啾]
#[]
test.data <- simchirp()$y
## Not run: ts.plot(test.data)[#不运行:ts.plot(test.data)]