Last active
September 9, 2024 12:49
-
-
Save rCarto/bb47aff0a02e808d2bf64f2d8c5db7d8 to your computer and use it in GitHub Desktop.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| st_aggregate <- function(x, by, var, fun){ | |
| var = c(by, var) | |
| fun = c("head", fun) | |
| n <- length(var) | |
| l <- vector("list", n) | |
| for (i in 1:n){ | |
| l[[i]] <- tapply(x[[var[i]]], x[[by]], add_args(fun[[i]]), n = 1, na.rm = TRUE) | |
| } | |
| names(l) <- var | |
| r <- sf::st_sf(do.call(data.frame, l), | |
| geometry = tapply(x[attr(x, "sf_column")], x[[by]], sf::st_union), | |
| crs = sf::st_crs(x)) | |
| r | |
| } | |
| add_args <- function(x){ | |
| rx <- get(x) | |
| fx <- formals(rx) | |
| fx$na.rm = TRUE | |
| fx$n = 1 | |
| formals(rx) <- fx | |
| rx | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment