The filter.NULL function applies the feature selection NULL to a set of physical measures. In other words, it returns all this data.
Usage
filter.NULL(...)
Arguments
...
Currently ignored.
Value
The filter.NULL function returns an object which can be used with the predict function to reduce each physical measure. This data can be the same or an other one than contained in $X$.The value of this function is an object of class filter.NULL, which is a list without element.
Details
The filter.NULL function is the feature selection NULL. It returns an object which can be used with the predict function to convert a set of physical measures to another one. But in this particular case, it returns all the data without reduction.