tidy.map {broom} | R Documentation |
This function turns a map into a data frame.
## S3 method for class 'map' tidy(x, ...)
x |
map object |
... |
not used by this method |
This code and documentation originated in ggplot2, but was called "fortify." In broom, "fortify" became "augment", which is reserved for functions that *add* columns to existing data (based on a model fit, for example) so these functions were renamed as "tidy."
if (require("maps") && require("ggplot2")) { ca <- map("county", "ca", plot = FALSE, fill = TRUE) head(tidy(ca)) qplot(long, lat, data = ca, geom = "polygon", group = group) tx <- map("county", "texas", plot = FALSE, fill = TRUE) head(tidy(tx)) qplot(long, lat, data = tx, geom = "polygon", group = group, colour = I("white")) }