| T O P I C R E V I E W |
| ulfhinze |
Posted - 06/29/2005 : 03:27:30 AM
Hi,
I need to multiply two graphs (datasets), which do not have the same increment in the x-axis. How can that be done in Origin?
Example:
Worksheet 1:
X1; Y1
1; 1
2; 4
3; 9
4; 16
5; 25
Worksheet 2:
X2; Y2
1.0; 5
1.6; 4
2.2; 3
2.8; 4
3.4; 5
4.0; 6
4.6; 5
5.2; 4
How can I multiply these graphs and get x -> y1(x)*y2(x)
Using a simple linear interpolation for the example above the result would be:
X; Y1*Y2
1; 5
2; 13.3
3; 39
4; 96
5; 108.3
Somehow I have to rescale the worksheets to the same x-increment and multiply the interpolated y-data then. But how can that rescaling be done in Origin?
Origin Version: 6.1
Operating System: W2k
Regards,
ulf |
| 2 L A T E S T R E P L I E S (Newest First) |
| Mike Buess |
Posted - 06/29/2005 : 12:04:01 PM
Hi Ulf,
Analysis > Simple Math interpolates automatically. It overwrites the first dataset so make a copy if you need it.
Mike Buess
Origin WebRing Member |
| ulfhinze |
Posted - 06/29/2005 : 05:28:22 AM
Hi,
I just solved the problem myself:
1. Plot the dataset as a graph.
2. Use Analysis/Interpolate to create an interpolated graph with an appropriate stepsize.
3. Use the dataset generated for this graph.
That's it. It's just in the wrong menu...
Regards,
Ulf
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