Re: [R] How to regress data into coefficients for a gamma function

2011-03-30 Thread JLucke
r-help@r-project.org cc Subject [R] How to regress data into coefficients for a gamma function Hello, I need to regress data like the example below. The data points represent friction factors derived from observed trip length data. The function used to describe this data is a gamma functio

Re: [R] How to regress data into coefficients for a gamma function

2011-03-29 Thread Peter Ehlers
On 2011-03-29 06:57, Walter Anderson wrote: Hello, I need to regress data like the example below. The data points represent friction factors derived from observed trip length data. The function used to describe this data is a gamma function of the form, f(t) = a * t^b * e^(c*t) and I need

[R] How to regress data into coefficients for a gamma function

2011-03-29 Thread Walter Anderson
Hello, I need to regress data like the example below. The data points represent friction factors derived from observed trip length data. The function used to describe this data is a gamma function of the form, f(t) = a * t^b * e^(c*t) and I need to regress the data to obtain the a,b, and