tkWidgets: guess.sep – R documentation

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guess.sep

Automatically determines whether a data file has a header and what delimiter is used to separate data columns

Description

This function reads a few lines from a data text file and determines whether a header exists, what the delimiter, and what data type each column is for a given file.

Usage

guess.sep(file.name, numLine = 5, seps = "", isFile = TRUE)
guess.header(twoLines, sep)
find.type(file.name, sep, header = FALSE, numLine = 5, isFile = TRUE)
charOrNum(vect)
getRowNames(file.name, sep, header, skip)

Arguments

`file.name`	`file.name` a character string for the name of the file of interests
`numLine`	`n` an integer or character indicating the total number of lines to be read from the file for making the determination
`seps`	`seps` a vector of characters of potential delimiters to be used to make the determination. Default delimiters include " ", ",", ";", and "\t". Anything inaddition to the default will have to be included in seps
`twoLines`	`twoLines` a vector of character string including the first two lines of a file that will be used to determine whether the file has a header
`sep`	`sep` a character for the delimiter used to separate columns in a file
`vect`	`vect` a vector of character or numeric string
`header`	`header` a boolean indicating whether a file has headers
`isFile`	`isFile` a boolean that is TRUE when `file.name` is a file or FALSE an object
`skip`	`skip` an integer for the number of lines to be skiped using `read.table`

Details

guess.sep calls guess.sep and find.type to determine the header, delimiter, and column data type of a file.

charOrNum determines which elements of a vector are numeric or character.

Value

This function returns a list containing

`header`	TRUE if there is a header and FALSE otherwise
`separater`	A character string indicating the delimiter used
`type`	A vector of character strings that are either character or numeric

Author(s)

Jianhua Zhang

Examples

# Create a temp file
tempData <- matrix(1:20, ncol = 4)
write.table(tempData, file = "tempData", quote = FALSE, sep =
"\t", row.names = FALSE, col.names = TRUE)

guess.sep("tempData")

unlink("tempData")

tkWidgets

R based tk widgets

v1.68.0

Artistic-2.0

Authors

J. Zhang <jzhang@jimmy.harvard.edu>

Initial release