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#1 2005-09-24 16:31:28

Atled
Member
Registered: 2005-08-22
Posts: 9

Exponential curve fit

Anyone know how to do regression analysis of a shifted exponential curve.

here is the data

1    0.997706596
2    0.243081214
3    0.079426264
4    0.03319443
5    0.016202707
6    0.00969521
7    0.007108719
8    0.004852038
9    0.003415406
10    0.002462571
11    0.001977777


the equation should look like a^((-x+1)/b) i think.

I cant seem to do it with my calculator it doesn't handle the shift.

Thanks

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#2 2005-09-25 00:45:17

kylekatarn
Member
Registered: 2005-07-24
Posts: 445

Re: Exponential curve fit

the general form should be

    (bx+c)
k.a
(don't know for shure, I never actually used this)
try using EXCEL to plot the data and them apply a regresison line (type exponential)

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