diffFilter-methods {xps} | R Documentation |
This method initializes the Difference Filter.
The difference is the maximum value minus minimum value for each row of the expression dataframe
divided by the mean value of each row.
The Difference Filter flags all rows with: flag = ((max - min)/mean >= cutoff)
Usage
diffFilter(object)
diffFilter(object, value)<-
object |
object of class PreFilter . |
value |
numeric vector c(cutoff, trim, epsilon) . |
The method diffFilter
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: (max - min) >= cutoff
An initialized PreFilter
object.
Christian Stratowa
prefltr <- PreFilter() diffFilter(prefltr) <- c(2.2,0.0,0.01) str(prefltr)