| picksome {forsearch} | R Documentation |
Structured Sets of Random Samples of Observations
Description
Restricts Step 1 of forward search procedures to ensure that every possible combination of levels is included for observations containing factors
Usage
picksome(subsetlist, nobs, initial.sample, n.obs.per.level, rank)
Arguments
subsetlist |
List, each element is a data frame of 2 columns with code indicating the highest possible level of interaction to which each observation can belong. Usually, output from variablelist function. |
nobs |
Number of observations in data frame containing observations of forward search. |
initial.sample |
Number of randomized sets of observations in Step 1 of forward search. |
n.obs.per.level |
Number of observations to pull from each level. |
rank |
Rank of the X matrix of the analytical function to be used on data frame. |
Details
Support function, usually not called independently. Argument n.obs.per.level is set by user in forsearch_xxx function call.
Value
Matrix, each row of which identifies observations in each set of random sample of observations.
Author(s)
William R. Fairweather