On Thu, Apr 30, 2009 at 4:14 PM, T J <tjhnson@gmail.com> wrote:
Fill between is for filling between two y-values over a range of
x-values.  Is there anything which fills between to x-values over a
range of y-values?

Nothing with the ease of use of fill_between, but you can always write your own PolyCollection, which is what fill_between does (see the function implementation for details) or create a Polygon for a simple region.  My use cases are typically in the time series world where I have datetime on the x-axis and some range of values on the y.  If folks think it is sufficiently useful to have a fill_betweenx function with a similar interface, you could probably fairly easy port fill_between to fill_betweenx.