print.sisal: Printing Sequential Input Selection Objects

In sisal: Sequential Input Selection Algorithm

Description

Prints information contained in a sequential input selection object.

Usage

## S3 method for class 'sisal'
print(x, max.warn = 10, ...)

Arguments

x	an object of class "sisal".
max.warn	a numeric value giving the maximum number of warnings to show. See max.warn in sisal.
...	additional arguments passed to other print methods.

Details

The following information is printed:

• Parameter values used in the sisal call

• Data dimensions

• Names of the input variables, if available

• Selected inputs, L.v (smallest validation error)

• Selected inputs, L.f (result within error margin)

• Whether L.f is a subset of L.v (nested model) or not

• The removal order and / or rank of the input variables (see plotSelected.sisal)

• The stages of search (if any) at which branching reduced validation error compared to a hbranches = 1 solution. Not printed if branching was not used or if it is possible that the search did not proceed through every set of variables on the hbranches = 1 path, i.e. if pruning.keep.best was FALSE. One must note that these results, like many others, are subject to randomness. Thus the results may differ between successive runs of sisal.

• Any warnings produced by the sisal run (see max.warn)

Value

Invisibly returns x.

Author(s)

Mikko Korpela

See Also

More information can be obtained with summary.sisal.

Examples

foo <- testSisal(dataset="toy", nData = 200, Mtimes = 10,
                 noiseSd = 0.5, verbose = 0)
print(foo)

Example output

sisal (no branching, OLS regression) results

Parameters:
pruning.criterion=round robin, Mtimes=10, kfold=10, hbranches=1, max.width=1, 
q=0.165, standardize=TRUE, pruning.keep.best=TRUE, pruning.reverse=FALSE, 
use.ridge=FALSE, sp=-1

Data dimensions:
inputs: 10, samples: 200

Input names are present:
 [1] "X1"  "X2"  "X3"  "X4"  "X5"  "X6"  "X7"  "X8"  "X9"  "X10"

Selected inputs (4), model with smallest validation error (L.v):
X1 X2 X3 X4 
 1  2  3  4 

Selected inputs (3), least complex model with error inside threshold (L.f):
X1 X2 X3 
 1  2  3 

L.f is a subset of L.v

Removal order of input variables (ends with remaining input):
X10  X6  X7  X5  X8  X9  X4  X1  X2  X3 
 10   6   7   5   8   9   4   1   2   3 
Ranking based on the removal order:
 X1  X2  X3  X4  X5  X6  X7  X8  X9 X10 
  3   2   1   4   7   9   8   6   5  10 

sisal documentation built on Feb. 16, 2020, 1:07 a.m.