Thank you very much, that makes things a lot clearer.
The issue with known roots and ancestors in my case is that these taxa
are actually molecules evolved from one another in the lab (with control
over the evolutionary process, though not the traits that emerge), so
the data on the root and
I've been comparing variables among objects (taxa) related by known
trees, using phylogentically independent contrasts in the ape package,
and want to move on to more complex models e.g. by using gls with
appropriate correlation terms. My trees contain lots of (hard)
polytomies and information
Hi, I think this is a problem solved but I would be interested to know
if there is some good reason why SSlogis() behaves like this (apologies
if this has been noticed before- I'm not confident my archive searches
were effective):
I have been fitting large numbers of regressions using nls with a
I'm trying to use odesolve for integrating various series of coupled 1st
order differential equations (derived from a system of enzymatic
catalysis and copied below, apologies for the excessively long set of
parameters).
The thing that confuses me is that, whilst I can run the function rk4:
out
I am tying myself in knots over subscripts when applied to lists
I have a list along the lines of:
lis-list(c(a,b,next,want1,c),c(d, next, want2, a))
From which I want to extract the values following next in each
member of the list, i.e. something along the lines of answer-c(
want1, want2).
