OptionalallowOptionalautoWhether to disable null filter; disabling can improve performance
OptionalbyteThe number of bytes to skip from source start
OptionalbyteThe number of bytes to read
OptionalcolumnsNames of columns to read; empty/null is all columns
OptionalcommentComment line start character
OptionalcompressionThe compression format of the source, or infer from file extension
OptionaldataNames and types of all the columns; if empty then names and types are inferred/auto-generated
OptionaldatetimeNames of columns to read as datetime
OptionaldecimalDecimal point character; cannot match delimiter
OptionaldelimiterField delimiter
OptionalfalseAdditional values to recognize as boolean false values
OptionalheaderHeader row index
OptionalinferWhether to parse dates as DD/MM versus MM/DD
OptionalkeepWhether to keep the built-in default NA values
OptionallineLine terminator
OptionalnullAdditional values to recognize as null values
OptionalnumRows to read; -1 is all
OptionalprefixString used as prefix for each column name if no header or names are provided.
OptionalquoteQuoting character (if allowDoubleQuoting is true)
OptionalquoteTreatment of quoting behavior
OptionalrenameWhether to rename duplicate column names
OptionalskipIgnore empty lines or parse line values as invalid
OptionalskipRows to skip from the start
OptionalskipWhether to skip whitespace after the delimiter
OptionalskipRows to skip from the end
OptionalthousandsNumeric data thousands separator; cannot match delimiter
OptionaltrueAdditional values to recognize as boolean true values
OptionalwhitespaceTreat whitespace as field delimiter; overrides character delimiter
Whether a quote inside a value is double-quoted