This function reads in a Tucson (decadal) format file of ring widths (.rwl).
read.tucson(fname, header = NULL, long = FALSE,
encoding = getOption("encoding"), edge.zeros = TRUE)a character vector giving the file name of the
rwl file.
logical flag indicating whether the file has a
header. If NULL then the function will attempt to determine
if a header exists.
logical flag indicating whether dates in file span
0 CE and therefore use negative numbers. If TRUE
only the first 7 characters can be used for series IDs.
If FALSE then series IDs can be up to 8
characters.
the name of the encoding to be used when reading the
rwl file. Usually the default value will work, but an rwl file
written in a non-default encoding may crash the function. In that
case, identifying the encoding and specifying it here should fix the
problem. Examples of popular encodings available on many systems
are "ASCII", "UTF-8", and "latin1" alias
"ISO-8859-1". See the help of file.
logical flag indicating whether leading or
trailing zeros in series will be preserved (when the flag is
TRUE, the default) or discarded, i.e. marked as NA
(when FALSE).
An object of class c("rwl", "data.frame") with the series in
columns and the years as rows. The series IDs are the
column names and the years are the row names.
This reads in a standard rwl file as defined according to the standards of the ITRDB at http://www1.ncdc.noaa.gov/pub/data/paleo/treering/treeinfo.txt. Despite the standards at the ITRDB, this occasionally fails due to formatting problems.