Arguments
file
character: path to file containing landmark
data.
x
either a vector specifiing which rows are to be
imported, or character vector containing variable names
to be sought for.
y
a vector specifiing, which columns of the
speradsheet ist to be imported.
rownames
integer: specifies columns, where
variable names are stored.
header
logical : if spreadsheet contains
header-row.
dec
character: defines decimal sepearator.
sep
character: defines column seperator.