Internally needed function for consistency checks and data preparation.

Function is necessary for eatRep and eatModel as well and therefore exported to namespace.

Usage

existsBackgroundVariables (dat, variable, warnIfMissing = FALSE,
     stopIfMissingOnVars = NULL)

Arguments

dat

A data frame

variable

vector of column number(s) or variable name(s)

warnIfMissing

Logical: gives a warning if the variable contains missing values

stopIfMissingOnVars

Character vector of variable names. Only for these variables, warnings as raised through warnIfMissing = TRUE are turned into errors.

Value

a structured list of variable names

Examples

# for more detailed examples, see help page of checkBackgroundVariables
data(mtcars)
existsBackgroundVariables(mtcars, 2:4)
#> [1] "cyl"  "disp" "hp"