Cthreshold(wavethresh)
Cthreshold()所属R语言包：wavethresh
Calls C code to threshold wd class object.
阈值WD类对象中调用C代码。
译者：生物统计家园网 机器人LoveR
描述----------Description----------
A routine that calls a C code function to do thresholding. This is really a test routine to call a C thresholding function (Cthreshold) and the user is advised to use the R based generic thresholding function threshold and/or its methods as they contain a wider range of thresholding options.
一个例程调用C代码的功能做阈值。这的确是一个测试程序中调用C的阈值的功能（Cthreshold）和它们包含了更广泛的阈值选项，建议用户使用R基于通用阈值函数threshold和/或它的方法。
用法----------Usage----------
Cthreshold(wd, thresh.type = "soft", value = 0, levels = 3 nlevels(wd) - 1))
参数----------Arguments----------
参数：wd
The wavelet object that you wish to threshold.
小波的对象，你想阈值。
参数：thresh.type
The type of thresholding. This can be "soft" or "hard". See threshold and methods for further details.
阈值的类型。这可以是“软”或“硬”。 threshold和方法，为进一步的细节。
参数：value
The threshold value that you want to be used (e.g. for hard thresholding wavelet coefficients whose absolute value is less than
要使用（例如硬阈值的小波系数绝对值小于阈值
参数：levels
The resolution levels that you wish to compute the threshold on and apply the threshold to.
分辨率级别，你想计算阈值和应用的阈值。
Details
详细信息----------Details----------
For general use it is recommended to use the threshold functions as they have a wider variety of options and also work for more complex varieties of wavelet transforms (i.e. non-decimated, complex-valued, etc). However, in the right, limited, situation this function can be useful. This function directly calls the C thresholding function Cthreshold(). The C function is used by routines that operate on behalf of the function that carries out two-fold cross validation in C (CWCV) which is also accessible using the policy="cv" option too threshold.wd
对于一般的使用建议使用threshold功能，因为他们有更广泛的选择，也适用于更复杂的品种的小波变换（即非元气大伤，复值等）。但是，正确的，有限的，情况此功能是有用的。这个函数直接调用C阈值函数Cthreshold的（）。使用C函数例程操作的功能进行了2倍交叉验证，这是C（CWCV）也可使用policy="cv"选项threshold.wd的代表
This function can be used by the user. It might be a bit faster than threshold.wd but mostly because it is simpler and does less checking than threshold.wd.
此功能可以由用户使用的。这可能是一个有点快threshold.wd但主要是因为它是简单的，但检查比threshold.wd。
值----------Value----------
A wd.object class object, but containing thresholded coefficients.
Awd.object类的对象，但包含阈值的系数。
（作者）----------Author(s)----------
G P Nason
参见----------See Also----------
threshold
threshold
实例----------Examples----------
#[]
# See copious examples in the help to threshold.wd[很多例子的帮助threshold.wd]
#[]
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注：
注1：为了方便大家学习，本文档为生物统计家园网机器人LoveR翻译而成，仅供个人R语言学习参考使用，生物统计家园保留版权。
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发表于 2012-10-1 17:16:32
