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The data file generated file is (added comments after each line):
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// Barometric Pressure - Month Created on 04:07:23PM 11/05/99 PST   	|| Comments on file and creation date
Barometric Pressure - Month    						|| Title Of Graph
Data starts: 05:09:12PM 10/09/99					|| Time and Date that data starts (NOT necessarily one month ago - depends on data)
XAxis - Days. 0 = 04:07:23PM 11/05/99					|| XAxis Title and where - 0 is (on right of graph!)
YAxis - Inches of Mercury. 						|| Y Axis title and units
0.000000								|| X Starting Value 
28.057039								|| Y Starting Value
1.381250								|| X Units per mark on graph (on MY Graph)
0.084063								|| Y Units per mark on Graph (on MY Graph)
17									|| Number of X,Y Points
4.041667								|| X1
28.377880								|| Y1
14.625000								|| X2
28.842646								|| Y2
15.125000
28.414381								|| Etc.
17.625000
28.174139
18.500000
28.383007
20.208333
28.057039
20.708333
28.678518
21.333333
28.465559
21.833333
28.646626
22.333333
28.414961
22.833333
28.545885
23.333333
28.177618
23.833333
28.190161
24.333333
28.209356
24.833333
28.235542
25.333333
28.897671
27.625000
28.303995