| T O P I C R E V I E W |
| BryanK |
Posted - 02/13/2015 : 11:08:44 AM
Origin Ver. 9 Operating System: Windows 7
Hello all,
I have two sets of data from two instruments: time vs voltage (a) and time vs temperature (b).
I am taking the slope Volt vs. Temp afterwards (c).
Currently, my (c) is becoming inaccurate; in the same time frame of 10 minutes, (a) collects 6000 data points and (b) collects 5000 data points. This can affect the slope (c) by about 20%.
Since I can't change the instrumental setup, is there an algorithm someone can recommend to "normalize" (a) and (b) so each has the same number of points?
Or... how do I "thin out" (a)'s extra points so Y(a) = Y(b) at any given time?
The attached image will hopefully clarify things. If one draws an imaginary vertical line between all black and red points over time, this will represent the current slope (c).
Thanks in advance for any suggestions,
Bryan |
| 3 L A T E S T R E P L I E S (Newest First) |
| jasonzhao |
Posted - 02/16/2015 : 03:46:09 AM
Hi Bryan,
Maybe you can also consider about Interpolate/Extrapolate Y From X
http://www.originlab.com/index.aspx?go=Products/Origin/DataAnalysis/Mathematics/InterpolationAndExtrapolation
use the x1 with 6000 as X value to interpolate, and use (X2,Y2) as Input. Thereby, the output new Y2 will in accord with X1 at each point.
Best regards
Jason
OriginLab Technical Service |
| BryanK |
Posted - 02/16/2015 : 02:18:11 AM
Hi Jason - not quite.
X1 and x2 both reach the 10 min "finish" at the same time but x1 does so with 6000 points and x2 with 5000. Now when I plot Y1vs.Y2, the data does not line up properly.
I don't know if it's the most elegant solution, but under Mathematics I used a Trace Interpolation on both data sets (in the time domain) and then plotted the traced Y1vsY2.
Bryan
quote:
Originally posted by jasonzhao
Hi Bryan,
You say that voltage-time(X1,Y1) collects 6000 data points and temperature((X2,Y2)) collects 5000 data points.
Do you mean that you want to perform interpolation for temperature using X1? after the interpolation temperature will have 6000 points as well.
Best regards!
Jason
OriginLab Technical Service
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| jasonzhao |
Posted - 02/15/2015 : 10:41:03 PM
Hi Bryan,
You say that voltage-time(X1,Y1) collects 6000 data points and temperature((X2,Y2)) collects 5000 data points.
Do you mean that you want to perform interpolation for temperature using X1? after the interpolation temperature will have 6000 points as well.
Best regards!
Jason
OriginLab Technical Service
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