mkgruff.rb

#!/usr/bin/ruby -Ku

require 'rubygems'
require 'gruff'
require 'csv'

day = Hash.new
weight = Array.new
fat = Array.new
i=0

# CSV Format ... Date,Weight,Body Fat
# Example = "2001/01/01, 65.5, 15,5"
CSV.foreach('weight.csv') do |line|
  if line[1] != nil and line[2] != nil then
    if i % 30 == 0 then
      day[i] = line[0]
    else
      day[i] = " "
    end
    weight << line[1].to_f
    fat << line[2].to_f
    i = i + 1
  end
end

wg = Gruff::Line.new(1024)
wg.title = "@smokeymonkey Weight"
wg.theme_odeo
wg.marker_font_size = 8
wg.x_axis_label='Date'
wg.y_axis_label='Weight(kg)'
wg.data("Weight",weight)
wg.labels = day

fg = Gruff::Line.new(1024)
fg.title = "@smokeymonkey Body Fat"
fg.theme_odeo
fg.marker_font_size = 8
fg.x_axis_label='Date'
fg.y_axis_label='Body Fat(%)'
fg.data("Fat", fat)
fg.labels = day

wg.write('weight.png')
fg.write('fat.png')