differentiation among populations

Hello, for some time I am trying to figure out the most proper design for my study and greatly appreciate any comments. I want to study intraspecific geographic morphological variation in mysid shrimps (Mysis relicta) and correlate/compare it with the presumably neutral molecular variation

Classification and Regression Trees (CART)

Do any of you have experience using CART (Classification and Regression Trees) for shape classification and if so, do you have any opinions or lessons learned you can share with me? Thanx, Kath Robinette == Replies will be sent to list. For more information see

Re: differentiation among populations

Hi, Sender: [EMAIL PROTECTED] Precedence: bulk Actually I have not received any direct answer. What I am going to do at the moment is to get partial warp scores from all the specimens and analyse these scores. Probably I could also use residuals after GPA to test for a congruence of the results.

tpsDig update

I have just uploaded ver. 1.33 of tpsDig to the Stony Brook Morphometrics server. It fixes a problem with template mode when the first point moved was to the right of the second point. Thanks to Diego Astua de Moraes for reporting the problem. --- F. James Rohlf State

Fish Bibliography - Correct URL

Dear Morphometricians, The Web address for the Fish Bibliography was wrong! The correct URL for the Fish Bibliography is given below: http://igspot.ig.com.br/maurobio/en/fish_bib.html Many thanks to Jim Rohlf for reporting the problem. Regards, -- + - - - - - - - - - - - - Mauro J.

RE: Fish Bibliography

I can't open the fish file. Is the address correct? The fish_html is suspicious, but fish.html doesn't work either. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Monday, February 24, 2003 7:28 AM To: [EMAIL PROTECTED] Subject: Fish Bibliography Dear

Mollusc Morphometrics Bibliography - seeking submissions

Dear Morphometricians, Sender: [EMAIL PROTECTED] Precedence: bulk Mauro's fish posting has prompted me to send out a request. I'm assembling a similar bibliography of mollusc morphometrics references. I'd also like to include a list of people interested in molluscan morphometrics.

Re: Mollusc Morphometrics Bibliography - seeking submissions

Dear Ellinor, Here are a few more references on mollusc morphometrics. Ackerly,SC (1990): Using growth functions to identify homologous landmarks on mollusc shells. In: Proceedings of the Michigan Morphometrics Workshop. (Eds: Rohlf,FJ; Bookstein,FL) (Special Publication, Number 2.) The

Re: Mollusc Morphometrics Bibliography - seeking submissions

Hi Ellinor, Here are references to a couple of my papers, as well as a few others I am aware of. Let me know if you would prefer full journal titles. Ackerly, S. C. 1989. Kinematics of accretionary shell growth, with examples from brachiopods and molluscs. Paleobiology 15: 147-164.

tpsSuper and tpsSplin updates

I have just uploaded new versions of tpsSuper and tpsSplin to the Stony Brook morphometrics website. tpsSuper was modified by adding an option to ignore image files. This allows one to just do a GPA superimposition and look at landmark configurations without loading the images. tpsSplin was

RE: question on the use of relative warp scores for statistical

What type of artifact? Is, for example, the fish bent due to preservation or is it something more complicated? RW1 is just a PC1 so the same rules apply to both. F. James Rohlf - Dept. Ecology Evolution SUNY, Stony Brook, NY 11794-5245 -Original Message- From:

Reminder: Include address

It has been suggested that I remind everyone that the email address of the sender of messages to morphmet is stripped from the message. If you want to allow direct replies to yourself, then you must include your email address as a signature or in some other form. Doing so will probably enhance

RE: question on the use of relative warp scores for statistical

Indeed as Jim notes. The positive elements of the first latent vector of a positive definite square matrix is an artefact. This is incorporated in the Frobenius-Perron theorem for the spectral properties of non-negative matrices. Ref. Gantmacher, F. R. Matrizenrechnung II (1966), VEB Deutscher

RE: question on the use of relative warp scores for statistical

The problem with PC1 is not what I would call a mathematical artifact. I view it as more of a statistical problem. In traditional morphometric data, variables usually have very large positive correlations between them. This is usually mostly due to the effects of size. Small organisms have small

tpsDig update

There was a problem in the upload of version tpsDig version 1.34 yesterday (the exe file for 1.31 was uploaded by mistake). It should be fixed now. Please try again. Sorry for the inconvenience. --- F. James Rohlf [EMAIL PROTECTED] 3/19/03 == Replies will be sent to list. For

Re: laser scanners

There are many 3D laser scanners out there, and they vary quite a bit in price and resolution. Given the size of the objects you're looking at, you would likely have to go for a more expensive model (eg laserdesign, polhemus). Portability, if required, also limits your choices. You might want to

Re: Allometry persists after procrustes?

Geez, I really did read it before I posted it (and before I approved it). Sorry... On Fri, 2003-03-28 at 09:34, [EMAIL PROTECTED] wrote: to a comment centroid (anywhere, but we take the origin for ^^^ common There are, of course, and infinite number of other approaches that

Jarrin jarrin@bu.edu

I agree with the idea of Dr. Warheit. And also apologize for my ingorance and possibly naive statements, nevertheless I would like to add some coments on the same theme. I have been thinking on how to remove allometric relationships after applying warp transformations, and probably working with

RE: Learning

Hi Marc, I am quite new in the morphometric field as well and like you I have had a lots of problem understanding many of the morphometric book that I came accross. Here some of the articles and book that were really helpful: Rohlf, J. F. (1990)Morphometrics. Annu. Rev. Ecol. Syst.

Moderation - reenabled

=== This message is coming to you from [EMAIL PROTECTED] that serves both as the administrative account for morphmet and the support account for the Morpheus et al. software. For more information on how to use this mailing list see... http://life.bio.sunysb.edu/morph/morphmet.html For more information

More spring cleaning

The following subscribers have been removed from morphmet due to delivery problems over the past month. If you recognize any of these folks, please let them know they must resubscribe to receive morphmet messages: [EMAIL PROTECTED] [EMAIL PROTECTED] [EMAIL PROTECTED] Thanks, ds -- Dennis E

Allometry persists after procrustes?

Dear friends, I understand that one of the main consecuences of applying alignment tranformations to landmark data, such as the GLS, is the elimination of the effects of size. In this case, I also understand that size is assumed to be isometric. Nevertheless, I found a paper explaining that

Re: Allometry persists after procrustes?

Hmmm, guess I felt like writing... There is a fair degree of subtlety embedded in this question. First, to say something about size you must define how you measure size. In the realm of superimpositions, one must also define criteria for measuring and optimizing translation and rotation.

PGLS in NTSYS

I would like to apply the phylogenetic generalized least-squares analysis implemented in NTSYS. I have tried with the three species example from Rohlf (2001, Evolution,55:2143-2160), but I am unable to reproduce the values for the intercept (0.6698; pag 2147) and the slope (0.0617). I would

Re: sliding landmarks papers?

On Tue, 24 Jun 2003 [EMAIL PROTECTED] wrote: Sender: [EMAIL PROTECTED] Precedence: bulk Reply-To: [EMAIL PROTECTED] SEMILANDMARKS, points that have been assigned geometric homology along curves and that are then treated as if they were proper landmarks in subsequent geometric morphometric

multivariate measure of shape variation

Dear morphometricians, I'd like to have your precious advice about possible simple measures of shape variation for a sample in a multivariate space. I discussed about this with Prof. Rohlf about one year ago, and I know that it's hard to find a 'good analogue' of SD in univariate analyses.

Re: linearity of variables

Dear Brett, this is just a fast opinion, and I am sure of that more experienced people in the list will be able to give you better advice. If I got it right, do not find discriminant analysis to be the best technique for your purposes. You will get as many groups as you enter into the analysis.

NTS2CSV Conversion program

Dear Morphometricians, I have written a very simple program for converting files in NTSYSpc format to the Comma-Separated Values (CSV) format compatible with MS-Excel and other spreadsheet and statistical software. Sure, Jim Rohlf's tpsUtil program can do that as well, but my program is quite

RE: morphometric software

While it was not designed for that specific purpose and thus perhaps not an ideal solution, I think it would be easier to use tpsDig than to have to digitize landmarks using tpsDig, then use PAST to compute all distances, and then select just the ones you want. TpsDig has a measurement mode that

RE: forthcoming conferences

Dear morphmetters There will be a symposium entitled 'Insect Morphometrics' at the next International Congress of Entomology in Brisbane, Australia, 15-21 August 2004. This symposium will feature morphometric studies that contribute to the understanding of insect biology -- development,

Re: 3D Thin Plane Spline

=== This message is coming to you from [EMAIL PROTECTED] that serves both as the administrative account for morphmet and the support account for the Morpheus et al. software. For more information on how to use this mailing list see... http

RE: 3D Thin Plane Spline

Hi, am in the process of exactly the same thing, I have some references, my email address is [EMAIL PROTECTED] Best Regards. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: 01 October 2003 13:16 To: [EMAIL PROTECTED] Subject: 3D Thin Plane Spline Dear

Re: the VTK TPS

Hi Fred, My name is Tim Hutton, apologies for the lack of identification in the previous post (it was my first message to this list). My email and details are below this time. In VTK (the visualization toolkit) there is the option of using the r2logr kernel or the r kernel, since the class does

Padwin Bacwin

This summer the copies of padwin and bacwin were lost from the Stony Brook server. I have tried to reach the author (Jean-Pierre Dujardin) but have not yet received a response. Please contact me if you have a recent address or have a recent copy of these programs. I would like to restore them to

GPA on 72 landmarks for 4431 subjects

To: Kathleen M. Robinette, Ph.D. Principal Research Anthropologist Air Force Research Laboratory I have to get special persmission to install any software on my computer, so I haven't been able to download any of this type of freeware yet. I hope to soon. I am

[Fwd: Graduate training opportunities at NYCEP]

The following should be of interest to the list. -dslice Dear friends and colleagues: As you may already know, NYCEP (the New York Consortium in Evolutionary Primatology) was recently funded by the NSF IGERT Program for 5 more years of

RE: Large sample sizes for TPS programs

With regards to the limit on number of samples in the TPS programs I have (in conjunction with Arnar Palsson) used ~15000 samples (wings) in both TPS RelW and PLS without any problems at all Ian Dworkin [EMAIL PROTECTED] == Replies will be sent to list. For more information see

software

Hi All, Sender: [EMAIL PROTECTED] Precedence: bulk Reply-To: [EMAIL PROTECTED] I am looking for software that can measure the angle between two lines WITHOUT having to identify the vertex of the angle. Many of the angles I am interested in are very small and I cannot plot the vertex within the

Re: software for angles

Erin, It seems this would be easy to do in a spreadsheet, but I use MorphoSys since I have it. This program can project two lines to find a vertex and then measure the angle between the lines. The program costs $250 but requires a $2000 out-of-production framegrabber that you can still get,

Re: Scaling, Translation and Rotation with a Subset of

account for morphmet and the support account for the Morpheus et al. software. For more information on how to use this mailing list see... http://life.bio.sunysb.edu/morph/morphmet.html For more information on Morpheus et al. visit... http://life.bio.sunysb.edu/morph/morpheus

New Year's Housekeeping

The following accounts have been deleted due to persistent delivery problems. If you recognize someone you believe still wants to be a morphmet subscriber, please contact them and let them know they must resubscribe with a recent address: [EMAIL PROTECTED] [EMAIL PROTECTED] [EMAIL PROTECTED

calipers

Hello Morphmetters, I would appreciate receiving information (i.e., supplier, distributer, price, and specifications) concerning purchasing calipers (e.g., approximately 30 cm maximum span) that can output readings directly to a computer. appreciatively, Jon Jon Stone McMaster University

Re: Shape variables and comparative methods

anything in the morphmet archives (but I'm not sure if I was using them correctly). Thanks in advance, C. Tristan Stayton == Replies will be sent to list. For more information see http://life.bio.sunysb.edu/morph/morphmet.html. == Replies will be sent to list. For more information see http

Re: calipers

Hi Jon, I like the Mitutoyo line: www.mitutoyo.com Cheers, Thom ()()( Dr. Thomas J. DeWitt, Assistant Professor Department of Wildlife Fisheries Sciences Program in Bioenvironmental Sciences Texas AM University 2258 TAMU College Station, TX 77843-2258 Tel.

tpsUtil update

I have just uploaded ver. 1.28 of tpsUtil to the Stony Brook morphometrics server. This implements a suggestion by Diego Astua de Moraes that the 'build tps file' window should use checkboxes and allow multiple selections at the same time as in the 'delete/reorder landmarks' window. It does seem

Asking for advice

I am doing a morphometric study about a shark, but I've got difficulties with the interpretation of the results. I've digitalized 75 specimens and marked 19 landmarks. I don't know whether is better to see the visuallization plot of the partial or of the relative warps for the interpretation of

response to shark question

Javier Your question is straightforward and I can recommend the approach I would take. With 19 landmarks you should have 34 PW's. My philosophy says you should ignore the RWs as they are an undesigned morphospace with respect to questions in which you are interested. I would perform the

Re: Asking for advice

[EMAIL PROTECTED] wrote: I am doing a morphometric study about a shark, but I've got difficulties with the interpretation of the results. I've digitalized 75 specimens and marked 19 landmarks. I don't know whether is better to see the visuallization plot of the partial or of the relative warps

a note on moderator editing

I would just like to remind everyone, that I do some reformatting of messages sent to morphmet. As part of the moderation process the text of messages are transferred from one document to another. This sometimes leads to formatting problems (especially with hard linebreaks). I go through

RE: response to shark question

I agree with most of the suggestions but there is still a role for relative warps in such a study. They give one an overall view of the major variation in the data. The ordination plot often allows one to detect (and thus eliminate) any wild outliers that might be present. It will also give one

[No Subject: response to shark thread -ds]

[Minor reformatting by me - line breaks and such. -ds ] I'd like to insert a comment into a current thread that several of you may have already heard me state in lectures, in previously anonymous reviews, and similar arenas. The stimulus for this was Thom DeWitt's answer just now to

RE: MANCOVA on partial warps - designed morphospace debate

Hello all, Sender: [EMAIL PROTECTED] Precedence: bulk Reply-To: [EMAIL PROTECTED] I loved some of the humor I saw in Thom's message, and was impressed that someone was able to insert some humor effectively. I am terrible at it, and even when I don't intend it I find that my messages can read as

MANOVA etc. continued

One more thought. Sender: [EMAIL PROTECTED] Precedence: bulk Reply-To: [EMAIL PROTECTED] In a univariate anova the distinction I made in the previous note is less clear. The division in an anova is by a scalar constant (square root of the error mean square) so that the relative differences

Statistical vs. shape spaces

terribly confused this situation. -ds] I enjoyed seeing morphmet suddenly come to life! Sorry I was not able to comment earlier about MANOVA, permutation tests, etc. (I was busy preparing for a seminar). I agree with a lot of what has been said but I will try making a few points in my own words. 1

Re: Asking for advice

First of all I would like to thank the quickness and the great number of contributions in answering my question about shark morphometrics: although in some concret aspects there are contraditory- or perphaps complementary- advices, in general it has clarified me lots of doubts. I would like to

Morpheus Operations

Fellow morphometricians: Sender: [EMAIL PROTECTED] Precedence: bulk Reply-To: [EMAIL PROTECTED] I would like to ask two questions regarding the operation of morpheus. Firstly, what command line do I have to type in to set the translation mode on for procrustes superimposition. Secondly, I am

Burnaby's method and discriminant analysis tolerance

Have anyone had problems with the tolerance in discriminant analysis if the input variables for such anlaysis have previously been transformed by Burnaby's method? We are studing the population structure of a fish species in the North Atlantic. 17 variables (distances between landmarks) have

Re: Burnaby's method and discriminant analysis tolerance

I don't really remember the details of what the Burnaby scale-adjustment does, but I think it's somewhat similar to Darroch and Mosimann's approach to scale adjustment (someone correct me if I'm wrong). With DM, the measurements are transformed by dividing through by some reasonable measure of

test - ignore

Fax: 336-716-2870 === This message is coming to you from [EMAIL PROTECTED] that serves both as the administrative account for morphmet and the support account for the Morpheus et al. software. For more information on how to use this mailing

More on Burnaby

Perhaps I need to expand on the implications of what I said in my message. Because the Burnaby method removes dimensions from a matrix, the resulting matrix is supposed to be singular. That means that software that does not use some form of generalized inverse will complain about the covariance

RE: Burnaby's method and discriminant analysis tolerance

That's right - I was perhaps a little too fast-and-loose when I equated Darroch and Mosimann with Burnaby. It would have been more precise to say that Darroch and Mosimann and Burnaby CAN give the same results, depending upon how you set them up. Dividing each measurement through by

RE: Tps regr

Some comments relative to the numerous questions: 1) When alpha is not zero the uniform component must be left out. This alone can change the relative warps. 2) Different non-zero values for alpha usually changes the relative warps also. The change can be quite large. 3) You should apply any

digitising open curves

Hi, Does anyone know of a program that can digitise open curves, i.e. place landmark and non-landmark points along an open-ended line or curve for EES analysis? I can't get tpsdig to do this, and can't see anything else obvious on the SB site. Thanks David

newbie question

Hi there, I got a newbie question. I was reading a paper on interspecific morphological variation, and at some point the authors say that each value of the standardized PC1 for each species was divided by 1/sqrt(number of characters) to assess morphological divergence from isometry. Could

Re: MatLab mapping of pixels from one human body image to

another Sender: [EMAIL PROTECTED] Precedence: bulk Reply-To: [EMAIL PROTECTED] The mapping of pixels described in today's email from Dr. Taylor is substantially the same as what is offered in the 2D module of our current Edgewarp package. Interested users should upload the 3.26 release from

[no subject]

I have a rather rough tool called MakeFan on my website that might be useful for your project. Have a look at http://www.canisius.edu/~sheets/morphsoft.html It produces output files in TPS format. -Dave Hi, Does anyone know of a program that can digitise open curves, i.e. place landmark

Monitoring to be disabled

I will be out of town for a while. Therefore, monitoring will be temporarily disabled on morphmet. I trust your common sense will tell you that I would not approve any money-laundering ventures with Nigerian widows. I keep all of those for myself and am waiting for my first big payout as soon

Re: MatLab mapping of pixels from one human body image to

another Sender: [EMAIL PROTECTED] Precedence: bulk Reply-To: [EMAIL PROTECTED] In general, Rohlf's program tpsSuper does this sort of thing. The idea is to: a) GPA the landmarks associated with a number of images (e.g., two) to create a consensus configuration. b) and this is the non-obvious

old EW2 manual

Hello again. For those interested enough to try image unwarping by Edgewarp, the 1994 (!) manual is on line at ftp://brainmap.med.umich.edu/pub/edgewarp2/MANUAL as an ascii file. (Note this is a different directory from the one where the current release itself is actually posted.)

RE: newbie question

I guess what is meant is the fact that if you compute a normalized PC1 from a correlation matrix based on p variables for data in which PC1 represents size and growth is isometric then the loadings will all be equal to 1/sqrt(p). That is because normalized means that the sum of the squared

GM-algae

Dear morphometricians, currently we are attempting to apply the landmark GM methods in the investigation of population dynamics and phenotypic plasticity in relation to experimentaly defined ecological conditions in some green algae, where the homologous landmarks (and/or semilandmarks) can be

Re: GM-algae

Since I don't see any replies to this, I will offer some comments: a) You're algae is quite nice looking. b) Despite the two-way symmetry of your organisms, if you are not interested in evaluating that part of shape variation, you can proceed (cautiously) to study it ignoring the asymmetry. Any

Updated directory of people interested in morphometrics

Stony Brook Morphometrics website update: I have just split the directory of people interested in morphometrics into four parts because it was getting long enough so that it was beginning to load slowly. I have also entered all of the corrections and new entries that people have sent me. Note that

Scaling in tpsDIG

Dear Group, I'm making my first foray into 2-D data collection, and have run up against a snag using tpsDig. The documentation states that if one uses the Set Scale feature, the scale factor Also scales the coordinates appropriately. I know that I'm in the correct mode because the Scale Factor

RE: Scaling in tpsDIG

That is correct, the coordinates themselves are still in pixels in order to plot correct against the image. Computations such as centroid size, areas, and linear distances are, however, computed with the scaled coordinates. --- F. James Rohlf State University of New York,

tpsRelw update

I have just uploaded ver. 1.39 of tpsRelw to the SB Morphometrics server. The primary change is to change the way the program slides semilandmarks. It provides a number of new options and also provides additional information. One will probably want to use the new version of the tpsSpline program

Morphmet: spring cleaning

, North Carolina, USA 27157-1022 Phone: 336-716-5384 Fax: 336-716-2870 === This message is coming to you from [EMAIL PROTECTED] that serves both as the administrative account for morphmet and the support account for the Morpheus et al. software

TPSdig and Missing Data

Thanks to all for the helpful responses concerning scaling in TPSdig. Now that I'm collecting data, I've run up against the missing data(MD) problem. Unless TPSdig has a missing landmark option that I've missed, I need to find some way to put a placeholder in the TPS file. The best idea I've

New book

The following may be of interest to list members: Sender: [EMAIL PROTECTED] Precedence: bulk Reply-To: [EMAIL PROTECTED] Morphometrics- Applications in Biology and Paleontology edited by Ashraf M. T. Elewa (Minia Univ., Egypt) Springer-Verlag (Heidelberg, Germany). 2004. XIV, 263 p., 104 illus.

Contact me [re: new book -ds]

For those who are interested in my book, please contact me, if you have problems or you need more details, on: [EMAIL PROTECTED] -- Dr. Ashraf M. T. Elewa Associate Professor Geology Department Faculty of Science Minia

morphmet problems

Sorry, folks, but the school upgraded their Microsoft mail server last week and crippled my access to the morphmet account. I can do some things, but it is a painfully difficult process. I have submitted a request for help, but only time will tell if the result is any different from submitting

Re: size correction discriminant functions analyses

Useful, though sometimes technical, information, critiques, and expositions on the traditional use of ratios in morphometric analysis can be found in: Bookstein, F. L. 1991. Morphometric Tools for Landmark Data: Geometry and Biology. (The Orange Book) and Bookstein, F. L., Chernoff, B., Elder,

Re: size correction discriminant functions analyses

You may also try looking at: Bookstein FL (1989) 'Size and shape': a comment on semantics. Systematic Zoology 38:173-180. Marc Moniz -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Tuesday, May 18, 2004 9:51 AM To: [EMAIL

Re: size correction discriminant functions analyses

You mention that you have many more variables than specimens. As a result, you cannot use the various alternatives that you list. Discriminant functions, canonical variates, etc. all require that the pooled within-group covariance matrix be based on a sample size larger than the number of

Re: size correction discriminant functions analyses

Dear Brett and Marta, I think the problem you are encountering may not be the size-versus-shape issue, but a Normal distribution issue. PCA Analysis assumes multivariate normality. I know for human beings the distribution of men and women combined is often not Multivariate Normal. It is

Re: size correction discriminant functions analyses

-- Dennis E. Slice, Ph.D. Department of Biomedical Engineering Division of Radiologic Sciences Wake Forest University School of Medicine Winston-Salem, North Carolina, USA 27157-1022 Phone: 336-716-5384 Fax: 336-716-2870 Sender: [EMAIL PROTECTED] Precedence: bulk Reply-To: [EMAIL

Re: size correction discriminant functions analyses

Dear Brett, If the problem is separating size and shape, then, fortunately, in my edited book titled Morphometrics- Applications in Biology and Paleontology (Springer-Verlag, 2004) you will find a chapter that is written by Garcia-Rodriguez et al. They used the Sheared PCA analysis and could

Re: size correction discriminant functions analyses

There is a method called common PCA which seems to overcome the problem of non-multinormality of overall sample that includes several subsamples all with different central momenta. The source to read is: Flury B. 1988. Common principal components and relatÅd multivariate models. NY: Wiley. 258 p.

Re: size correction discriminant functions analyses

Just a comment on this one, from a pragmatic point of view. It is of course true that PCA is only *guaranteed* to produce components maximizing variance if you have multivariate normality. The theory of PCA is based on this assumption. But in many cases, PCA is used purely as a visualization

Re: size correction discriminant functions analyses

In my understanding to PCA, its main goal is to reduce the dimensionality of a problem without the loss of too much information. In other words, according to Prof. Rohlf, the purpose of PCA is to give you a low dimensional space that accounts for as much variation as possible. However, I agree

Re: size correction discriminant functions analyses

Don't know what happened to cause the earlier message largely void of content, but I think the original communication was to correct the Red Book reference. The date is 1985, not 1982. -ds On Tue, 2004-05-18 at 14:12, [EMAIL PROTECTED] wrote: -- Dennis E. Slice, Ph.D. Department of

Re: size correction discriminant functions analyses

Dear collegues, Sender: [EMAIL PROTECTED] Precedence: bulk Reply-To: [EMAIL PROTECTED] About the above discussion on the linear measurements data for multivariate analysis, I should state that most times my problem (and I expect the problem of many people that wrks with it) is not of

Re: size correction discriminant functions analyses

I applaud your courage, Dr. Hammer. I hope everyone appreciates how intimidating this list of experts can be. I also agree with your point that PCA can be used when the data are not multivariate normal if you are just using it to visualize information, or if you just know what it is doing

Re: size correction discriminant functions analyses

Dr. Hammer, Please consider your courage credited. -ds A couple of points about PCA in general: 1) PCA makes no assumptions about the distribution (multivariate normal or otherwise) of your data. It is a procedure that simply produces the linear combinations of variables with maximum variance

RE: morphologika now available for free download

Dear Colleagues, Nicholas Jones and I are pleased to announce that morphologika, which is a Windows based program for 3d geometric morphometrics is available at: http://www.york.ac.uk/res/fme/index.htm It can be downloaded from the resources page. We ask that you complete details of your

Re: size correction discriminant functions analyses

1) PCA makes no assumptions about the distribution (multivariate normal or otherwise) of your data. It is a procedure that simply produces the linear combinations of variables with maximum variance subject to orthogonality to other such axes. OK, but variance may or may not be a meaningful

Re: size correction discriminant functions analyses

Marta, I have a pdf version of the Darroch Mosimann Biometrika paper. What is your e-mail address so I can send it directly to you. Marc Moniz [EMAIL PROTECTED] -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Thursday, May 20, 2004 11:35 AM To: [EMAIL

morphmet administration back to normal

While my original account problems have not been solved, they have at least be addressed by moving to a new server. So, I now have total (much faster than before) access to the morphmet account. This means list moderation should be back to what passes for normal. However, if you posted a message

Re: size correction discriminant functions analyses

G'day all, Sender: [EMAIL PROTECTED] Precedence: bulk Reply-To: [EMAIL PROTECTED] Thanks to everyone for your comments. They've been a great help, and I'm glad that my question sparked a bit of discussion on the subject. After some pondering, I've got a few more questions and some more details

human facial changes over time

Is anyone aware of studies regarding changes in facial size or shape over time among adult humans, independent of weight gain, significant dental work, or disfigurement? Thanks. Dennis Groce NIOSH, Morgantown WV == Replies will be sent to list. For more information see

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