--- a/r.rst Sun Mar 06 00:25:36 2016 +0200
+++ b/r.rst Sun Mar 06 00:27:25 2016 +0200
@@ -223,3 +223,7 @@
dfnew <- df[-ncol(df)] # last
dfnew <- df[-c(1, 3:4, 7)] # range
+Drop column from data frame by name::
+
+ newdf <- df[ , !(names(df) %in% c("lat", "long"))]
+