-------- Original Message --------
Subject: Re: svd in shapes[R]
Date: Thu, 28 May 2009 11:37:01 -0700 (PDT)
From: Michael Coquerelle <[email protected]>
To: <[email protected]>
References: <[email protected]>
Hi Fabio,
I got the same message several months ago. With my data set, 151
specimens and 415 (semi)landmarks in 3d, I never had a problem while
using procgpa from the library shapes. But when I started to analyze
just a subset of the data, let say 200 (semi)landmarks, I got this
message. So I subdivided my sample by the half, one half worked the
other not. So I tried to find out what was wrong with this second half.
I did several GPA with this wrong subsample minus 1 specimen. After
several GPA impossible to run untill the end with the same error mesage,
there was one GPA completed. I checked out the specimen I erased from
that GPA and this specimen had one pair of landmarks inverted. So your
problem might be similar, two landmarks can be inverted in one specimen
of your sample.
I hope that will help you.
Cheers,
Michael
----- Original Message -----
From: "morphmet" <[email protected]>
To: "morphmet" <[email protected]>
Sent: Thursday, May 28, 2009 8:07 PM
Subject: svd in shapes[R]
-------- Original Message --------
Subject: svd in shapes[R]
Date: Thu, 28 May 2009 10:50:13 -0700 (PDT)
From: Fabio de A. Machado <[email protected]>
To: [email protected]
Hi to all,
I'm having some problems when I try to perform a GPA on a particularly
large dataset with the package shapes [ R ]. The error msg is:
Error in La.svd(x, nu, nv) : error code 1 from Lapack routine 'dgesdd'
I have 495 shapes with 68 2d landmarks. I've tried to make some subsets
and to remove some landmarks to identify the problem. The problem seems to
correlate with the size of the dataset, but I have already used the same
script on a larger dataset and got no errors. I was also able to perform
multiples GPAs on smaller samples within the full set and, again, got no
errors.
A quick search on the web showed that other people had similar problems
while trying to perform a svd and also asked if it was related to the size
of the dataset, but I found no solutions.
If anyone have any idea how to solve this, I would appreciate the help.
cheers,
Fábio de A. Machado
Laboratório de Herpetologia/Morfometria
Museu de Zoologia da USP
Av. Nazaré, 481, Ipiranga
São Paulo, SP, 04263-000
+55 11 20658130
+55 11 82631029
[email protected] <mailto:[email protected]> ; [email protected]
<mailto:[email protected]>
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