Check names for SQLite column name conventions.

Checks names for SQLite column name conventions and applies appropriate variable name changes to GADSdat or all_GADSdat objects.

Usage

checkVarNames(
  GADSdat,
  checkKeywords = TRUE,
  checkDots = TRUE,
  checkDuplicates = TRUE
)

Arguments

GADSdat

GADSdat or all_GADSdat object.

checkKeywords

Logical. Should SQLite keywords be checked and modified?

checkDots

Logical. Should occurrences of "." be checked and modified?

checkDuplicates

Logical. Should case insensitive duplicate variable names be checked and modified?

Value

Returns the original object with updated variable names.

Details

Invalid column names in a SQLite data base include

• SQLite keywords (see sqlite_keywords),

• column names with a "." in it and

• duplicate variable names which arise from SQLite being case insensitive.

The corresponding variable name changes are

• appending the suffix "Var" to all SQLite keywords,

• changing all "." in variable names to "_" and

• appending "_2" to case insensitive duplicated variable names.

Note that avoiding "." in variable names is beneficial for multiple reasons, such as avoiding confusion with S3 methods in R and issues when importing from Stata.

Examples

# Change example data set (create an invalid variable name)
pisa2 <- changeVarNames(pisa, oldNames = "computer_age",
                        newNames = "computer.age")
#> computer.age has been renamed to computer_age

pisa3 <- checkVarNames(pisa2)