| ImportRW {treeglia} | R Documentation |
Loads a csv text file containing the ring widths measured on tree cross-sections.
ImportRW(filename)
filename |
a string giving the name of the file to load |
Ring-widths and their calendar years, as well the heights of the cross-sections they were measured from must be stored in a csv file. Ring-widths will be ordered in columns, from the lowest cross-section, to the highest (nearest to tree tip) cross-section. The first row will hold cross-sections heights (in m). The first column will hold the calendar years whose ring refer. Csv files can be created through any spreadsheet program. As an example of what a future ring-width csv file might look in a spreadsheet consider the following:
| 0.0 | 1.30 | 3.00 | 5.00 | |
| 1990 | 1234 | |||
| 1991 | 1234 | |||
| 1992 | 1234 | 4232 | ||
| 1993 | 1234 | 4232 | 353 | |
| 1994 | 1234 | 4232 | 353 | |
| 1995 | 1234 | 4232 | 353 | |
| 1996 | 1234 | 4232 | 353 | 3567 |
| 1997 | 1234 | 4232 | 353 | 3567 |
| 1998 | 1234 | 4232 | 353 | 3567 |
Returns a data.frame object holding the ring-widths. Calendar years are coded as row names, and can be accessed via rownames().
Cross-section heights along the stem are coded column names, they can be accessed via colnames() and converted to numeric values via as.numeric().
Decimals should be dot-separated.
Marco Bascietto