Hey all,
Greeting!
There's a freeware PAST (Paleonological Statistics) developed by Oyvind
Hammer. It's worth an evaluation. What do you think?
Cesar
*/morphmet <[EMAIL PROTECTED]>/* wrote:
[Sorry for the delay in posting this and the previous message, but I
was
unexpectedly trapped out of town and away from the internet for
nearly a
week. - the Moderator (dslice)]
Many curve digitization packages (e.g., tpsDIG, ImagePro Plus) give
you the
ability to sample curves with a fixed number of equally spaced (or
quasi-equally spaced) semi-landmark points. The x,y -> ext. phi
program in
my extended eigenshape package indeed assumes you have collected
your data
in this format. I can think of a few obvious workarounds and, if
there is a
need for the capability of reading in outline strings of different
lengths
in that program, I'd be happy to add it. Given the capabilities of
tpsDIG,
however, it would seem the best thing to do is collect the data in the
expected format to being with.
Please contact me offline if you need instructions has to how to
make tpsDIG
collect outline strings of equal lengths.
Norm MacLeod
___________________________________________________________________
Prof. Norman MacLeod
Keeper of Palaeontology
The Natural History Museum
Cromwell Road, London, SW7 5BD
(0)207 942-5204 (Office)
(0)207 942-5546 (Fax)
http://www.nhm.ac.uk/palaeontology/a&ss/nm/nm.html (Web Page)
___________________________________________________________________
On 23/2/06 20:24, "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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