Hello all,
I'm having a bit of a semilandmark problem. I'm working on 3D surfaces with
semilandmarks. (Profuse thank yous to Emma for writing the scripts for
that.) The issue I'm having I think is occurring in the sliding. When I do
populations alone everything seems normal. The semilandmarks do
Ari,
If you are using geomorph, you might want to update it via GitHub. Just a few
days ago we updated the software with some bug fixes for surface points (one
bug fix was for assuring non-arbitrary directions in PC planes for tangents of
surface points). If you are unsure how to do that,
Mike, does this mean that, in general, the
position of the semilandmarks is strongly sample
dependent, which would mean that also the shape
distances might change remarkably despite the
fact one has the same number of points on exactly the same surface?
Say that I have two samples, A and B. I
Will update and try again. That sounds - without being too hopeful - like
it might solve my problem. If not, I'll come back with better details.
I would also like the clarification on the point Andrea has asked about.
That sounds like a concerning issue for what I'm trying to do with this.
Andrea,
I like to think of semilandmark sliding as iteratively finding fitted
(predicted) values for the generalized linear model fit described by Gunz et
al. (2005) (equation 4), and updating coordinates by these values until there
is no more meaningful change (with regard to an acceptable
Ariadne Schulz ha scritto:
Hello all,
I'm having a bit of a semilandmark problem. I'm working on 3D surfaces with
semilandmarks. (Profuse thank yous to Emma for writing the scripts for
that.) The issue I'm having I think is occurring in the sliding. When I do