Displaying 2 results from an estimated 2 matches for "anchovies".
2006 Aug 17
6
Rails and Checkboxes
...e
a pizza by setting check boxes. The choose their toppings, click submit
and the form does a callback and shows them how much it will cost to
have a pizza with those toppings on.
At the moment I have the following:
View:
<%= start_form_tag :action => "pick_your_own" %>
Anchovies
<%= check_box "pizza", "anchovies" %>
<% end_form_tag %>
Controller:
@total = 0
if @pizza.anchovies? > 0 then
@total = @total + 10
end
This gives me a NoMethodError with "You have a nil object when ou didn''t
expect it. This error occur...
2005 Jul 28
2
lattice/ grid.layout/ multiple graphs per page
Background:
OS: Linux Mandrake 10.1
release: R 2.0.0
editor: GNU Emacs 21.3.2
front-end: ESS 5.2.3
---------------------------------
Colleagues
I have a set of lattice plots, and want to plot 4 of them on the page.
I am having trouble with the layout.
grid.newpage()
pushViewport(viewport(layout = grid.layout(2,2)))
pushviewport(viewport(layout.pos.col = 1, layout.pos.row = 1))
working trellis