[Sorry for the delay in posting this and the next message, but I was
unexpectedly trapped out of town and away from the internet for nearly a
week. - the Moderator (dslice)]
Gordon,
A number of spline functions exist for taking n points with two
endpoints and creating a new set of k equispaced points along that
outline and ending in the same or another two endpoints. The Gnu
Public R computational environment is a free package that will do that
with a function called spline()
Joe Kunkel
On Feb 23, 2006, at 3:24 PM, morphmet wrote:
Dear All,
My name is Gordon Smith, a PhD student at Sheffield University.
my e-mail is [EMAIL PROTECTED]
My query is about open outlines and extended eigenshape analysis.
I have what amounts to 2D open outlines, for a number of individuals,
as
X,Y coordinate data. After my minimal literature review, I thought that
the best way to analyse this data would be with extended eigenshape
analysis using the Norman Macleod software from the Stony Brook
website.
However, after playing with the software and further reading it seems
that
the number of X,Y coordinates for each open outline should be the same
for
every individual in the comparison.
This is not the case for my dataset. I have found a number of software
packages that appear would calculate an equal number of X,Y coordinates
per open outline from image data such as bitmaps, jpegs, etc. but not
from
collected X,Y data.
So I have two questions really, Firstly is my understanding correct and
that to be able to compare individuals will they all require an equal
number of X,Y coordinates along the open outline.?
Secondly, If this is correct can anybody suggest how I make my current
X,Y
coordinate data compatible with the analysis.?
I am very new to the world of morphometrics, and would welcome any and
all
help,
as to key papers, books etc.
Please reply if any further information would be helpful to answer this
query.
Many Thanks
Gordon.
e-mail [EMAIL PROTECTED]
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Joseph G. Kunkel, Professor
Biology Department
University of Massachusetts Amherst
Amherst, MA 01003
http://www.bio.umass.edu/biology/kunkel/
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