Bug#514935: openoffice.org-calc: Power regressions are wrong.
Hi Kurt,
Kurt Roeckx wrote:
> I was trying to do a power regression in a chart, and the results are completly wrong.
>
> It's a gamma curve, so the formula should be in the form of y = x^gamma, and the result I
> have are very close to a gamma curve. But the regression curve it's showing me
> doesn't fit at all, and has a power that's clearly wrong.
>
> Trying to fit it manually, I get a curve in that looks very close. It's a gamma curve
> near 2.3, so I should get something like 1 * x^2.3, but instead I get 0.68 * x^1.61.
>
> If I generate the gamma curve myself, so with very small errors, and let it do
> the regression on that, I do get the correct result.
Can you please:
- tell me some exact steps to do this? I have no clue of power regressions/
gamma curves.
- try in 3.0.1?
Grüße/Regards,
René
--
.''`. René Engelhard -- Debian GNU/Linux Developer
: :' : http://www.debian.org | http://people.debian.org/~rene/
`. `' rene@debian.org | GnuPG-Key ID: 248AEB73
`- Fingerprint: 41FA F208 28D4 7CA5 19BB 7AD9 F859 90B0 248A EB73
Reply to: