Read file after deducing file type from suffix.

If the input is XLSX, sheets named "key" and "varlab" are imported if the exist. If input is CSV, then the key CSV file is imported and another file suffixed with "-varlab" is imported if it exists.

keyRead(file, ..., na.strings = c("\\s+"))

Arguments

file

name of file to be imported, including path to file. file name must end in "csv", "xlsx" or "rds"

...

additional arguments for read.csv or read.xlsx.

na.strings

Values to be converted to R missing symbol NA. Default is white space, "\s+".

Value

A data frame or matrix.

Details

The variable lables are a named vector saved as an attribute of the key object.

Author

Paul Johnson <pauljohn@ku.edu>