----- Forwarded message from "F.
James Rohlf"
Date: Sat, 22 Sep
2012 18:40:34 -0400
From: "F. James Rohlf"
Reply-To: "F. James Rohlf"
Subject: RE: sliding semilandmark issue -
tpselw
To: morphmet@morphometrics.org
F. James Rohlf, E&E Stony Brook
University
Sent from my mobile device
morphmet_modera...@morphometrics.org wrote:
----- Forwarded message
from Eric Wilberg -----
Date: Fri, 21 Sep
2012 12:55:00 -0400
From: Eric Wilberg
Reply-To: Eric Wilberg
Subject: sliding semilandmark issue -
tpselw
To:
morphmet@morphometrics.org
While recently running an anlaysis in tpsrelw
including sliding
semilandmarks, I noticed that the posterior-most one or
two
semilandmarks on a curve were sliding past the anchor landmark on some
specimens. I thought the anchor points were supposed to be the
boundaries of the curve, thus the semilandmarks shouldn't be able to
slide past them. I went back and checked and these specimens were
digitized properly. Is this likely a problem with my data set or am I
misunderstanding what the anchor points are for? Any help would be
much
appreciated.
~Eric
eric.wilb...@uni.edu
----- End
forwarded message -----
----- End forwarded message
-----
The points slide along tangent vectors. It is a simple
procedure that can get in trouble when the curve is not smooth or points are too
far apart.
-------------
- sliding semilandmark issue - tpselw morphmet_moderator
- RE: sliding semilandmark issue - tpselw morphmet_moderator