Origin Ver. and Service Release (Select Help-->About Origin): OriginLab OriginPro 8.6 SR3 Operating System: win 7/ 64
Hi, I would like to integrate the entire area under the curve limited by the dashed lines. The dashed lines do not represent experimental data and are not a part of the graph. The "integration" function only allows me to connect the left and right endpoint of the curve with a straight line while the "Peak analyser" allows me define a constant baseline. Any ideas? Thanks
Starting from your graph, select Gadgets : Integrate from the menu. In the dialog that opens, click the Baseline tab and set the Mode to "Constant Y" and Constant to "Custom". Enter the correct Y value ... a little less than 1.05 ... and click OK.
If you click anywhere within the Region of Interest (ROI - the yellow rectangle) you will get selection handles on the left and right sides which you can use to define the X limits of integration, or you can use the button at the upper right to make various other changes.
You can do the same thing in the Peak Analyzer : Integrate Peaks goal.
OK, I just solved the problem by just choosing once Mathematical Area and once Absolute Area and then making just simple calculation with thos two to get one or the other area :) I think it should be correct.
Integration of area under a curve
Posted - 11/08/2012 : 12:55:54 PM
