R: Convert a data frame to a delimited string

format_delim {readr} | R Documentation

## Convert a data frame to a delimited string

### Description

These functions are equivalent to `write_csv()` etc., but instead of writing to disk, they return a string.

### Usage

    format_delim(x, delim, na = "NA", append = FALSE, col_names = !append)

    format_csv(x, na = "NA", append = FALSE, col_names = !append)

    format_tsv(x, na = "NA", append = FALSE, col_names = !append)

### Arguments

`x` | A data frame to write to disk
`delim` | Delimiter used to separate values. Defaults to `" "`. Must be a single character.
`na` | String used for missing values. Defaults to NA. Missing values will never be quoted; strings with the same value as `na` will always be quoted.
`append` | If `FALSE`, will overwrite existing file. If `TRUE`, will append to existing file. In both cases, if file does not exist a new file is created.
`col_names` | Write columns names at the top of the file?

### Value

A string.

### Output

Factors are coerced to character. Doubles are formatted using the grisu3 algorithm. POSIXct's are formatted as ISO8601.

All columns are encoded as UTF-8. `write_excel_csv()` also includes a UTF-8 Byte order mark which indicates to Excel the csv is UTF-8 encoded.

Values are only quoted if needed: if they contain a comma, quote or newline.

### References

Florian Loitsch, Printing Floating-Point Numbers Quickly and Accurately with Integers, PLDI '10, http://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf

[Package readr version 1.1.1 Index]