From: "Williams, Chris" <Chris.Williams@...>
Date: 2005-04-19T00:17:24+09:00
Subject: Re: ruby SVG::Graph module problem.

Simon,
 
> #======Code==========
> #!/usr/bin/ruby
> require 'SVG/Graph/TimeSeries'
> # Data sets are x,y pairs
> data1 = ["17/6/72", 11, "11/1/72", 7, "13/4/04 17:31", 11, "11/9/01",
9,
> "11/9/85", 2, "1/9/88", 1, "15/1/95", 13]
> data2 = ["1/8/73", 18, "1/2/77", 15, "1/10/98", 4, "1/5/02", 14,
> "1/3/95", 6, "1/8/91", 12, "1/12/87", 6, "1/5/84", 17, "1/10/80", 12]
> title = "This is the title"
> graph = SVG::Graph::TimeSeries.new( {
>   :width => 640,
>   :height => 480,
>   :graph_title => title,
>   :show_graph_title => true,
>   :no_css => true,
>   :key => true,
>   :scale_x_integers => true,
>   :scale_y_integers => true,
>   :min_x_value => 0,
>   :min_y_value => 0,

.. snip ..
 
> #========output============
> c:/ruby/lib/ruby/1.8/date/format.rb:236:in `dup': can't dup Fixnum
> (TypeError)
> 	from c:/ruby/lib/ruby/1.8/date/format.rb:236:in `_parse'
> 	from c:/ruby/lib/ruby/1.8/parsedate.rb:9:in `parsedate'
> 	from
> c:/ruby/lib/ruby/site_ruby/1.8/SVG/Graph/TimeSeries.rb:176:in
> `min_x_value='

If you look, SVG is choking on the min_x_value. It looks like it expects
a date string in the format you use in your data set, not a Fixnum of 0
as you have set it.

Try entering the start date as a string for the value and see if that
fixes it.

Thanks,
Chris