Why can't I access this type?

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On Sun, 22-Mar-2015 at 08:06AM -0800, John Kane wrote:

|> Well, first off, you have no variable called "Name".  You have lost
|> the state names as they are rownames in the matrix state.x77 and
|> not a variable.

If you did this:

all.states  <- within(as.data.frame(state.x77), Name <- rownames(state.x77))

instead of

all.states  <- within(as.data.frame(state.x77), state <- rownames(state.x77))

then this would worka;

cold.states <- all.states[all.states$Frost > 150, c("Name", "Frost")]

Modify the above to match where my guess at what you tried is in error.


HTH