[Tioga-users] Grid lines

[Bill Paxton]

On Apr 11, 2007, at 10:08 AM, Ivars Finvers wrote:
>

> Is it possible to produce grid lines in a Tioga plot? I've looked
> through the examples and documentation and was unable to any mention
> of grid lines.
>

Hi Ivars,

There isn't anything special for grid lines in Tioga (at least not  
yet!), but you can
do-it-yourself pretty easily.  Here's the "Blues Plot" from samples/ 
plots.rb with
grid lines added by hand.

     def blues_with_grid
         read_data
         t.do_box_labels('Blues Plot', 'Position', '\textcolor[rgb] 
{0,0,1}{Blues}')
         show_model_number
         xs = @positions
         ys = @blues
         t.show_plot(plot_boundaries(xs,ys, at margin,-1,1)) {
             t.context {
                t.line_width = 0.5
                t.line_type = Line_Type_Dot
                t.line_color = Gray
                [0,2,4,6].each {|x| t.stroke_line 
(x,t.bounds_top,x,t.bounds_bottom) }
                [-1,-0.5,0,0.5,1].each {|y| t.stroke_line 
(t.bounds_left,y,t.bounds_right,y) }
             }
             t.show_polyline(xs,ys,Blue) }
     end


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Cheers,
Bill