cvFilter-methods {xps} | R Documentation |
This method initializes the Coefficient of Variation Filter.
The coefficient of variation is the standard deviation divided by the absolute value of the mean.
The CV Filter flags all rows with: flag = (cv >= cutoff)
Usage
cvFilter(object) |
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cvFilter(object, value)<- |
object |
object of class PreFilter . |
value |
numeric vector c(cutoff, trim, epsilon) . |
The method cvFilter
initializes the following parameters:
cutoff : | the cutoff level for the filter. | |
trim : | the trim value for trimmed mean (default is trim=0 ). |
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epsilon : | value to replace mean (default is epsilon=0.01 ): |
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epsilon > 0 : replace mean=0 with epsilon. |
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epsilon = 0 : always set mean=1. |
Note, that for epsilon = 0
the filter flags all rows with: stdev >= cutoff
An initialized PreFilter
object.
Christian Stratowa
prefltr <- PreFilter() cvFilter(prefltr) <- c(0.3,0.0,0.01) str(prefltr)