You should be able to add another series, and change it to a line series.
The trick is to make sure it is associated with the appropriate axis.
To add the series, copy the data, select the chart, and use Paste Special
from the Edit menu to add the data as a new series. Alternatively use Source
Data from the Chart menu, and use the Series tab.
To change the series type, select the series, then use Chart Type from the
Chart menu, and choose a line type for the selected series.
To associate the series with the appropriate axis, double click on it, and
choose Primary or Secondary on the Axis tab.
In order to get drop lines between the dates, you would need to have a
multiple column range for the category data:
2000 Q1
Q2
Q3
Q4
2001 Q1
Q2
Q3
Q4
etc.
But then you are obliged to show both the years and the quarters. The best
you could do is use outside or cross as the axis tick style.
- Jon
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Jon Peltier, Microsoft Excel MVP
Peltier Technical Services
Tutorials and Custom Solutions
http://PeltierTech.com/
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