| varFilter-methods {xps} | R Documentation |
This method initializes the Variance Filter.
The Variance Filter flags all rows with: flag = (var/mean >= cutoff)
Usage
varFilter(object)
varFilter(object, value)<-
object |
object of class PreFilter. |
value |
numeric vector c(cutoff, trim, epsilon). |
The method varFilter initializes the following parameters:
cutoff: | the cutoff level for the filter. | |
trim: | the trim value for trimmed mean (default is trim=0). |
|
epsilon: | value to replace mean (default is epsilon=0.01): |
|
epsilon > 0: replace mean=0 with epsilon. |
||
epsilon = 0: always set mean=1. |
Note, that for epsilon = 0 the filter flags all rows with: variance >= cutoff
An initialized PreFilter object.
Christian Stratowa
prefltr <- PreFilter() varFilter(prefltr) <- c(0.6,0.02,0.01) str(prefltr)