Cast does not auto-generate column names

[peacej]

First of all, thanks for the awesome library. However, I can't get "cast" to work as it does in the Reshape package for R, namely, I can't figure out how to name columns based on the values of the fields of the input data.

As you can see at the bottom of this R Reshape example:
http://www.statmethods.net/management/reshape.html

"x1" and "x2" were values of field "variable" before casting and after casting "x1" and "x2" become column names. Is it possible to do this with "cast" in melt.js? If so, how? Thank you very much.

[allthesignals]

I also can't get this to work. I think "cast" in this library is more of a "group by." Cast to me means how it is described in that R documentation.