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 Calculating Area within enclosed line plot		  New Topic  Reply to Topic
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auddoula

USA
Posts
Posted - 08/03/2007 :  10:40:10 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Hello Everyone,
I need to calculate the area enclosed by a complex line as seen in the figure here. One can of course, divide the plot in two parts, find the area under the each graph, then subtract to get the total. But is there any quick and easy functionality that can do that for me?

fzimnoch

USA
28 Posts
Posted - 08/03/2007 :  11:15:50 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hello

If the data is a single set of XY data then after plotting choose Analysis:Calculus:Integrate and the area between the curves will be calculated with the resulting area in the Results Log. The sign of the area will depend on the direction of integration.

FRED
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Mike Buess

USA
3037 Posts
Posted - 08/03/2007 :  1:37:46 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
You can also use the Baseline tool (Tools> Baseline).

1. Make sure the upper curve is the active dataset.
2. Select the Use Existing Dataset option and enter the name of the lower curve (e.g., Data1_C).
3. Click the Create Baseline button.
4. Go to the Area tab and click the Use Baseline button. Area goes to Results log.

Mike Buess
Origin WebRing Member
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