thresh {treethresh} | R Documentation |
Thresholds according to a tree object of the classes
treethresh
or wtthresh
.
thresh(object, data, C, postmed=TRUE) thresh.treethresh(object, data, C, postmed=TRUE) thresh.wtthresh(object, data, C, postmed=TRUE)
object |
An object of the class treethresh or
wtthresh according to which thresholding is to be
carried out. |
data |
The data to be thresholded. If object is of the class
treethresh , then object has to be an array (or
matrix) of exactly the same dimension as the data that was used to
estimate object . If object is of the class
wtthresh it has to be a list with elements of the
same name and dimensions as the list that was used to estimate
object . If no data object is given and if object is not
estimated directly from the beta then the data used to
estimate object is used. |
C |
If C is given then the tree is pruned with constant
C (see the help of prune for details on the
pruning). |
postmed |
If postmed=TRUE then the thresholding is done by
returning the posterior median mu_i|X_i. If
postmed=FALSE then hard thresholding is performed. |
thresh
returns the thresholded data
.
thresh.treethresh
and thresh.wtthresh
should rarely be directly called by the user. The more user-friendly S3 function
thresh
will take care of calling the right function.
For an example of the use of thresh
, see
coefficients
.
treethresh
, wtthresh
, get.t
, prune