opticaldynamics Posted October 5, 2009 Posted October 5, 2009 Hey, I have a pressure vs. Time graph plotting my pressure data from a reactor. The line is pretty jumpy though, from the changing voltage data. How can I average out my pressure data so I can get a more accurate value for the pressure?
AzeoTech Posted October 5, 2009 Posted October 5, 2009 The easiest way is to use the smooth function. So if your Y expression is "pressure", make it "smooth(pressure,5)" where 5 is the number of points you'd like to average over. Higher values make smoother plots, but less detail. Its a running average, so each point is the average of the last x points and so there is overlap. If you don't want overlap, use boxcar() instead.
ccdubs Posted October 5, 2009 Posted October 5, 2009 A form of averaging that I use that requires very little memory use is the following: Avg = LastAvg - (LastAvg - CurrentValue)/X If X is 1 you get the current value, the larger the value of X the longer the averaging time.
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