| T O P I C R E V I E W |
| oszkoa |
Posted - 09/25/2006 : 2:52:16 PM
Origin Version (Select Help-->About Origin): 7.5 pro
Operating System: Win XP
Hi all,
I have a spectrum with multiple peaks (e.g an infrared spectrum or a gas chromatogram) I would like to fill one or more of the peaks with different colors/patterns between the peak envelope and a baseline defined by me. Is it possible to achieve it in Origin?
Thanks: Oszkoa |
| 1 L A T E S T R E P L I E S (Newest First) |
| Hideo Fujii |
Posted - 09/25/2006 : 4:00:24 PM
Hi Oszkoa,
Not sure regarding what you wrote as filling with "with different colors/patterns", if you only need to fill between the curve and the base line with a single color, you can do the following steps:
First, modify the original curve data by adding points of a "return path" on your baseline. For example, you can change the original points:
1 0.263804
2 0.64968
3 1.171673
.....
30 3.117269
to:
1 0.263804
2 0.64968
3 1.171673
.....
30 3.117269
30 3
1 0.1
1 0.263804
Note that the third and second lines from bottom define the base line of this sample, and it returns to the original first point. If your baseline is not a straight line, you need more points on the return path.
Then, you can plot this modified data, and open the Plot Detail dialog box by double-clicking the plot. In the Line tab, check the "Fill Area Under Curve" check box, and select "Inclusive broken by missing values". You get the filled area like below:
--Hideo Fujii
OriginLab
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