simPop (version 0.2.15)

simRelation: Simulate categorical variables of population data

Description

Simulate categorical variables of population data taking relationships between household members into account. The household structure of the population data needs to be simulated beforehand using simStructure.

Usage

simRelation(simPopObj, relation = "relate", head = "head", direct = NULL,
  additional = c("nation", "ethnic", "religion"),
  limit = NULL, censor = NULL, maxit = 500,
  MaxNWts = 2000, eps = NULL, nr_cpus=NULL, seed)

Arguments

simPopObj

a simPopObj containing population and household survey data as well as optionally margins in standardized format.

relation

a character string specifying the columns of dataS and dataP, respectively, that define the relationships between the household members.

head

a character string specifying the category of the variable given by relation that identifies the household head.

direct

a character string specifying categories of the variable given by relation. Simulated individuals with those categories directly inherit the values of the additional variables from the household head. The default is NULL such tha

additional

a character vector specifying additional categorical variables of dataS that should be simulated for the population data.

limit

this can be used to account for structural zeros. If only one additional variable is requested, a named list of lists should be supplied. The names of the list components specify the predictor variables for which to limit the possible outcomes of the resp

censor

this can be used to account for structural zeros. If only one additional variable is requested, a named list of lists or data.frames should be supplied. The names of the list components specify the categories that should be censored. For each

maxit, MaxNWts

control parameters to be passed to multinom and nnet. See the help file for nnet.

nr_cpus

if specified, an integer number defining the number of cpus that should be used for parallel processing.

eps

a small positive numeric value, or NULL (the default). In the former case, estimated probabilities smaller than this are assumed to result from structural zeros and are set to exactly 0.

seed

optional; an integer value to be used as the seed of the random number generator, or an integer vector containing the state of the random number generator to be restored.

Value

• An object of class simPopObj containing survey data as well as the simulated population data including the categorical variables specified by additional.

Details

The values of a new variable are simulated in three steps, where the second step is optional. First, the values of the household heads are simulated with multinomial log-linear models. Second, individuals directly related to the corresponding household head (as specified by the argument direct) inherit the value of the latter. Third, the values of the remaining individuals are simulated with multinomial log-linear models in which the value of the respective household head is used as an additional predictor. The number of cpus are selected automatically in the following manner. The number of cpus is equal the number of strata. However, if the number of cpus is less than the number of strata, the number of cpus - 1 is used by default. This should be the best strategy, but the user can also overwrite this decision.

See Also

simStructure, simCategorical, simContinuous, simComponents

Examples

data(ghanaS) # load sample data
samp <- specifyInput(data=ghanaS, hhid="hhid", strata="region", weight="weight")
ghanaP <- simStructure(data=samp, method="direct", basicHHvars=c("age", "sex", "relate"))
class(ghanaP)

ghanaP <- simRelation(simPopObj=ghanaP, relation="relate", head="head")
str(ghanaP)