I am wondering if there is a function which will do a join between 2 data.frames by minimum distance, as it is done in ArcGIS for example. For people who are not familiar with ArcGIS here it is an explanation:
Suppose you have a data.frame with x, y, coordinates called track, and a second data frame with different x, y coordinates and some other attributes called classif. The track data.frame has a different number of rows than classif. I want to join the rows from classif to track in such a way that for each row in track I add only the row from classif that has coordinates closest to the coordinates in the track row (and hence minimum distance in between the 2 rows), and also add a new column which will record this minimum distance. Even if the coordinates in the 2 data.frames have same name, the values are not identical between the data.frames, so a merge by column is not what I am after. I did an R Site Search but nothing related to this particular type of join emerged. Thanks, Monica _________________________________________________________________ Live. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
