x
 | 
the object to be written, typically a data frame.  If not, it
is attempted to create one from it.
 | 
file
 | 
the name of the file which the data are to be written to.
 | 
sep
 | 
the field separator string.  Values on each line of the file
are separated by this string.
 | 
col.names
 | 
a logical value indicating whether the column names
of x are to be written along with x, or a character
vector of column names to be written.
 | 
row.names
 | 
a logical value indicating whether the row names of
x are to be written along with x, or a character
vector of row names to be written.
 | 
quote
 | 
a logical or a numeric vector.  If TRUE, any
strings in the data will be surrounded by double quotes.  If a
numeric vector, its elements are taken as the indices of the
variable (columns) to quote.  In both cases, row and columns names
are always quoted if they are written.
 | 
na
 | 
the string to use for missing values in the data.
 | 
eol
 | 
the character(s) to print at the end of each line (row).
 |