Re: Graph trendlines - a question.

2007-07-05 Thread Gareth.J.Martin
Can you tell us what you saw and what you expected? Plotting river stage data against discharge data and adding a power law I obtained the equation: ln(y) = 111.778ln(x)-445.855 I was expecting something of the form a=cB^d, which is the standard form for stage-discharge relationships (I do

Re: Graph trendlines - a question.

2007-07-05 Thread Jean Bréfort
Le jeudi 05 juillet 2007 à 20:29 +0100, Gareth.J.Martin a écrit : Can you tell us what you saw and what you expected? Plotting river stage data against discharge data and adding a power law I obtained the equation: ln(y) = 111.778ln(x)-445.855 this is the same as: y = exp(-445.855) *

Graph trendlines - a question.

2007-07-04 Thread Gareth.J.Martin
Hello, I've only recently started using Gnumeric (Windows, v1.7.10) and have found it to be a brilliant programme to use. I frequently use it to analyse river flow data. The first time I applied a power law trend to some plotted data the equation that I was presented with was not what

Re: Graph trendlines - a question.

2007-07-04 Thread Andreas J. Guelzow
On 7/4/2007, Gareth.J.Martin [EMAIL PROTECTED] wrote: I've only recently started using Gnumeric (Windows, v1.7.10) and have found it to be a brilliant programme to use. I frequently use it to analyse river flow data. The first time I applied a power law trend to some plotted data the