r - Moving columns within a data.frame() without retyping

Question

Is there a method for moving a column from one position in a data.frame to the next - without typing an entirely new data.frame()

For example:

a <- b <- c <- d <- e <- f <- g <- 1:100
df <- data.frame(a,b,c,d,e,f,g)

Now let's say I wanted "g" in front of "a"

I could retype it, as

df <- data.frame(g,a,b,c,d,e,f)

But is there not a quicker way? (Imagine 1500+ columns)

Answer 1

The subset function has a nice select argument that gives a convenient way to select ranges of columns by name:

df <- subset(df, select=c(g,a:f))