Stoppage line on line chart

[schnett]

I have a a few series of data on my line chart like this :

2003-03 0.2 0.7
2003-04 0.0 0.8
2003-05 0.1 0.6
2003-06 0.0 0.1
2003-07 0.0 0.6
2003-08 0.0 0.7
2003-09 0.0 0.8
2003-10 0.1 0.7
2003-11 0.0 0.4
2003-12 0.1 0.7
2004-01 0.0 0.4
2004-02 0.1 0.3
2004-03 0.0 1.1
2004-04 0.0 0.4
2004-05 0.1 1.5
2004-06 0.1 0.8
2004-07 0.0 0.3
2004-08 0.2 0.7
2004-09 0.0 0.7

I would like to have a vertical line on my chart that I update every quarter. For example :
1st qtr => at 2003-10 a vertical line from 0.0 to 2.0.
2nd qtr => at 2004-01 a vertical line from 0.0 to 2.0.
The problem is my chart is not an xy chart.

I know how to put a line on the chart manually but I don't know how to do it automatically.

Can anyone help ?

[Ron Coderre]

Maybe something like this....

Add an extra data series to the right of the current data:

2003-03 0.2 0.7
2003-04 0.0 0.8
2003-05 0.1 0.6
2003-06 0.0 0.1
2003-07 0.0 0.6
2003-08 0.0 0.7
2003-09 0.0 0.8
2003-10 0.1 0.7 0.2<--------
2003-11 0.0 0.4
2003-12 0.1 0.7
2004-01 0.0 0.4 0.2<---------
2004-02 0.1 0.3
2004-03 0.0 1.1
2004-04 0.0 0.4
2004-05 0.1 1.5
2004-06 0.1 0.8
2004-07 0.0 0.3
2004-08 0.2 0.7
2004-09 0.0 0.7

Add that data series to the chart. (It will initally plot like your other series)

Next, right click on the new series and select Format Series.
Y-Error Bar Tab:
-Select the dot with the drop line
-Set the Error Amount to Fixed Value: 0.2
Patterns Tab:
-Marker: None
Click [OK]

Right-click on one of the Error Bars
Patterns Tab:
Set the line color and weight.

You should now have 2 vertical lines from 0 to 0.2 marking the 2 quarters.

Does that help?