Hello Jarrod and Simon,
i have a similiar issue. I want to use splines with the MCMCglmm-package. I
need the packages for various reasons. I try to incorporate the splines via
Jarrod´s function, which based on the mgvc-package.
I attached my data and codes. For the thin-plate-splines the fixed
Dear Jarrod,
I've only managed to have a very quick look at this, but I wonder if the
difference is to do with identifiability constraints? It looks to me as
if your smooth.construct call does not have sum to zero constraints
applied to the smooth, but by default 'gamm' will impose these
Hi Simon,
That's perfect - the matrices now agree.
Thanks,
Jarrod
Quoting Simon Wood s.w...@bath.ac.uk on Mon, 03 Mar 2014 13:35:04 +:
Dear Jarrod,
I've only managed to have a very quick look at this, but I wonder if
the difference is to do with identifiability constraints? It looks
Hi Simon,
Sorry, I spoke too soon. I now have the basic spline code working but
with `by' variables I get an error in smoothCon:
Error in ExtractData(object, data, knots) :
'names' attribute [1] must be the same length as the vector [0]
and a segfault with smooth.construct (see example
Hi All,
I would like to fit a varying coefficient model using MCMCglmm. To do
this it is possible to reparameterise the smooth terms as a mixed
model as Simon Wood neatly explains in his book.
Given the original design matrix W and penalisation matrix S, I would
like to find the fixed
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