Bob wrote: >As mentioned earlier in this thread. The function that has been used in >several posts >isn’t the right log function. The proper fit is to ln(bt+1)
You are absolutely right. It was my mistake to use the ln(t) in the graph. As that was what I know in Excel and I don´t have Stable32 or MatLab. In Excel I actually double checked that (a*ln(bt+1)) with b 5 to 1000 gave about the same as (a*ln(t)) for my data set (only the offset was largely different). Hopefully someone can find the correct a and b for a*ln(bt+1) with stable32 or matlab for this data set: Days ppb 2 2 4 3.5 7 4.65 8 5.05 9 5.22 12 6.11 13 6.19 25 7.26 32 7.92 It would also be interesting if I could get the drift after 10 years to see if it is about 6E-13/day as with the ln(t). Peter wrote: >> I'm not very good with Excel, but this curve-fitting function sounds very >> useful. Could you please tell me how it's done? In the graph I only right-clicked the curve and selected ”add trendline” here I checked the logarithmic and show equation. Lars _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
