Re: Graph trendlines - a question.

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) * x^111.778

I was expecting something of the form a=cB^d, which is the standard form 
for stage-discharge relationships (I do have the exact relationship but 
I am unable to get access to my work computer). I imagine it is my bad 
maths but I'm just a bit confused! Thanks for the help.

Best wishes,

Jean Bréfort <jean brefort normalesup org>

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