pointer.year: Calculate pointer-year values from raw tree-ring widths
In delferts/Dendro: Functions to work with dendro data

This function takes object of raw tree-ring widths measuraments and calculates stand pointer-year values for each year of original data.

@param x a data frame with year values in the first column and raw tree ring measuraments in all other columns @usage pointer.year(x) @return A data frame with year values in the first column and the calculated stand pointer-year values in the second column @examples data(ozols) point<-pointer.year(ozols) point[1:10,]