Re: [MORPHMET] Statistics software question
Thanks Justin. As far as I know, lillie.test() only works on the normal distribution, which limits its use for other distributions (like exponential, gamma, uniform, etc.) If I recall correctly, lillie.test() also uses an analytical approximation to calculate p-values, whereas ours uses Monte Carlo simulation. I'm not familiar with gofTest() and look forward to checking it out. Cheers, Phil On 1/31/2019 12:24 PM, Justin Bagley wrote: Hi Phil, Congrats on the R package and for helping make others aware of the need for said KS correction! Nice work. I'm sure you're already aware of this, but just in case, and for clarification,... Lilliefors' Kolmogorov-Smirnoff test is already implemented in the 'lillie.test' function of the nortest R package. This test is also already implemented in the R package EnvStats, in its 'gofTest' function (i.e. gofTest(y, ..., test='lillie')). Interested parties might like to know, Does the development of your package predate these, or does it imply that the test is performed incorrectly in these existing packages? Take care. Best, Justin Justin C. Bagley, Ph.D. Postdoctoral Research Associate Department of Biology University of Missouri-St. Louis One University Boulevard, 223 Research Building St. Louis, MO 63121-4499 E-mail: bagl...@umsl.edu<mailto:bagl...@umsl.edu> Website: https://justinbagley.org CV: https://justinbagley.org/pages/cv.html Blog: https://justinbagley.rbind.io Affiliate Researcher Department of Biology Virginia Commonwealth University 1000 W Cary St, Rm 126, Richmond, VA 23284-2012 On Thu, Jan 31, 2019 at 11:53 AM Novack-Gottshall, Philip M. mailto:pnovack-gottsh...@ben.edu>> wrote: Thanks, Justin! I've checked out whichever help docs I can find, but I've discovered that sometimes a particular "correct" is not always mentioned, even when used in the software. The reason I'm checking is that I'm a co-author on an R package (LcKS) that implements the Lilliefors correction for the one-sample goodness-of-fit Kolmogorov-Smirnoff test and we're writing a manuscript to accompany it. Apparently the correction is not widely used or known about (outside of the statistical community), and it's a major oversight. (For example, ks.test in R [very subtly] cautions the user about the violation but does not actually offer a fix, and it's not available in base R or 'stats'.) We've discovered many published articles that appear to do the test in the incorrect manner. Our package and manuscript, we hope, will help improve the situation by calling attention to the bias and offering a simple solution. Best wishes, Phil On 1/31/2019 11:46 AM, Justin Bagley wrote: Dear Phil, SAS has excellent support and documentation. Just go to their website at https://support.sas.com/en/documentation.html, type in a search query for the statistical test of interest, and you'll get links to the appropriate section of the SAS/STAT 14.3 User's Guide. Detailed information is given on statements to call different tests. You should be able to quickly find the information you need using this procedure (with a statistics text in hand), and I imagine that similar online documentation resources are available for the other major programs that you mentioned. Nevertheless, all in all, I don't recommend that you go with _any_ of the software programs in your list for statistical analyses of biological data, unless they are the only software programs that implement the test you need. Instead, I suggest that you conduct statistical analyses in the R environment for statistical computing (https://cran.r-project.org) or write bash or Python wrapper scripts around existing programs to conduct your analyses. Is there not an R package that will conduct the test you need to do? Since we received this through MORPHMET, perhaps you could state the question you have about the "particular statistical test" in question in a way that is specific and that relates to morphometrics, and I'm sure that someone would be able to help you out in more detail. Good luck. Best, Justin C. Bagley, Ph.D. Postdoctoral Research Associate Department of Biology University of Missouri-St. Louis One University Boulevard, 223 Research Building St. Louis, MO 63121-4499 E-mail: bagl...@umsl.edu<mailto:bagl...@umsl.edu> Website: https://justinbagley.org CV: https://justinbagley.org/pages/cv.html Blog: https://justinbagley.rbind.io Affiliate Researcher Department of Biology Virginia Commonwealth University 1000 W Cary St, Rm 126, Richmond, VA 23284-2012 On Thu, Jan 31, 2019 at 11:04 AM Novack-Gottshall, Philip M. mailto:pnovack-gottsh...@ben.edu>> wrote: Hi all, Apologies for cross-posting, but I'm not sure where this best lands. I'm trying to find people who have access to (preferably some experience with) any of the following statistical software programs: -MiniTab -SAS -SPSS -S-Plus -STATA -SYSTAT If you do, might you contact me off-l
Re: [MORPHMET] Statistics software question
Whoops, I meant the 'KScorrect' package. LcKS() is the primary function in it, not the package name. Phil On 1/31/2019 11:53 AM, Novack-Gottshall, Philip M. wrote: Thanks, Justin! I've checked out whichever help docs I can find, but I've discovered that sometimes a particular "correct" is not always mentioned, even when used in the software. The reason I'm checking is that I'm a co-author on an R package (LcKS) that implements the Lilliefors correction for the one-sample goodness-of-fit Kolmogorov-Smirnoff test and we're writing a manuscript to accompany it. Apparently the correction is not widely used or known about (outside of the statistical community), and it's a major oversight. (For example, ks.test in R [very subtly] cautions the user about the violation but does not actually offer a fix, and it's not available in base R or 'stats'.) We've discovered many published articles that appear to do the test in the incorrect manner. Our package and manuscript, we hope, will help improve the situation by calling attention to the bias and offering a simple solution. Best wishes, Phil On 1/31/2019 11:46 AM, Justin Bagley wrote: Dear Phil, SAS has excellent support and documentation. Just go to their website at https://support.sas.com/en/documentation.html, type in a search query for the statistical test of interest, and you'll get links to the appropriate section of the SAS/STAT 14.3 User's Guide. Detailed information is given on statements to call different tests. You should be able to quickly find the information you need using this procedure (with a statistics text in hand), and I imagine that similar online documentation resources are available for the other major programs that you mentioned. Nevertheless, all in all, I don't recommend that you go with _any_ of the software programs in your list for statistical analyses of biological data, unless they are the only software programs that implement the test you need. Instead, I suggest that you conduct statistical analyses in the R environment for statistical computing (https://cran.r-project.org) or write bash or Python wrapper scripts around existing programs to conduct your analyses. Is there not an R package that will conduct the test you need to do? Since we received this through MORPHMET, perhaps you could state the question you have about the "particular statistical test" in question in a way that is specific and that relates to morphometrics, and I'm sure that someone would be able to help you out in more detail. Good luck. Best, Justin C. Bagley, Ph.D. Postdoctoral Research Associate Department of Biology University of Missouri-St. Louis One University Boulevard, 223 Research Building St. Louis, MO 63121-4499 E-mail: bagl...@umsl.edu<mailto:bagl...@umsl.edu> Website: https://justinbagley.org CV: https://justinbagley.org/pages/cv.html Blog: https://justinbagley.rbind.io Affiliate Researcher Department of Biology Virginia Commonwealth University 1000 W Cary St, Rm 126, Richmond, VA 23284-2012 On Thu, Jan 31, 2019 at 11:04 AM Novack-Gottshall, Philip M. mailto:pnovack-gottsh...@ben.edu>> wrote: Hi all, Apologies for cross-posting, but I'm not sure where this best lands. I'm trying to find people who have access to (preferably some experience with) any of the following statistical software programs: -MiniTab -SAS -SPSS -S-Plus -STATA -SYSTAT If you do, might you contact me off-list mailto:pnovack-gottsh...@ben.edu>>? I'm trying to find out how each program handles a particular statistical test. My question can likely be answered with a quick check of the help documentation for the software or by running a sample data set I can provide, if interested. Thanks, Phil ~ Phil Novack-Gottshall, PhD Professor pnovack-gottsh...@ben.edu<mailto:pnovack-gottsh...@ben.edu> Department of Biological Sciences Benedictine University 5700 College Road Lisle, IL 60532 Office: 332 Birck Hall Lab: 316 Birck Hall Phone: 630-829-6514 Fax: 630-829-6547 https://pnovack-gottshall.wixsite.com/home Spring 2019 office hours: Tues/Thurs 9:30-11:00 AM Wed 10 AM - 12:15 PM If you have urgent academic advising questions, please contact Anne Baysinger (Birck 130) ~ -- MORPHMET may be accessed via its webpage at http://www.morphometrics.org --- You received this message because you are subscribed to the Google Groups "MORPHMET" group. To unsubscribe from this group and stop receiving emails from it, send an email to morphmet+unsubscr...@morphometrics.org<mailto:morphmet%2bunsubscr...@morphometrics.org>. -- ~ Phil Novack-Gottshall, PhD Professor pnovack-gott
Re: [MORPHMET] Statistics software question
Thanks, Justin! I've checked out whichever help docs I can find, but I've discovered that sometimes a particular "correct" is not always mentioned, even when used in the software. The reason I'm checking is that I'm a co-author on an R package (LcKS) that implements the Lilliefors correction for the one-sample goodness-of-fit Kolmogorov-Smirnoff test and we're writing a manuscript to accompany it. Apparently the correction is not widely used or known about (outside of the statistical community), and it's a major oversight. (For example, ks.test in R [very subtly] cautions the user about the violation but does not actually offer a fix, and it's not available in base R or 'stats'.) We've discovered many published articles that appear to do the test in the incorrect manner. Our package and manuscript, we hope, will help improve the situation by calling attention to the bias and offering a simple solution. Best wishes, Phil On 1/31/2019 11:46 AM, Justin Bagley wrote: Dear Phil, SAS has excellent support and documentation. Just go to their website at https://support.sas.com/en/documentation.html, type in a search query for the statistical test of interest, and you'll get links to the appropriate section of the SAS/STAT 14.3 User's Guide. Detailed information is given on statements to call different tests. You should be able to quickly find the information you need using this procedure (with a statistics text in hand), and I imagine that similar online documentation resources are available for the other major programs that you mentioned. Nevertheless, all in all, I don't recommend that you go with _any_ of the software programs in your list for statistical analyses of biological data, unless they are the only software programs that implement the test you need. Instead, I suggest that you conduct statistical analyses in the R environment for statistical computing (https://cran.r-project.org) or write bash or Python wrapper scripts around existing programs to conduct your analyses. Is there not an R package that will conduct the test you need to do? Since we received this through MORPHMET, perhaps you could state the question you have about the "particular statistical test" in question in a way that is specific and that relates to morphometrics, and I'm sure that someone would be able to help you out in more detail. Good luck. Best, Justin C. Bagley, Ph.D. Postdoctoral Research Associate Department of Biology University of Missouri-St. Louis One University Boulevard, 223 Research Building St. Louis, MO 63121-4499 E-mail: bagl...@umsl.edu<mailto:bagl...@umsl.edu> Website: https://justinbagley.org CV: https://justinbagley.org/pages/cv.html Blog: https://justinbagley.rbind.io Affiliate Researcher Department of Biology Virginia Commonwealth University 1000 W Cary St, Rm 126, Richmond, VA 23284-2012 On Thu, Jan 31, 2019 at 11:04 AM Novack-Gottshall, Philip M. mailto:pnovack-gottsh...@ben.edu>> wrote: Hi all, Apologies for cross-posting, but I'm not sure where this best lands. I'm trying to find people who have access to (preferably some experience with) any of the following statistical software programs: -MiniTab -SAS -SPSS -S-Plus -STATA -SYSTAT If you do, might you contact me off-list mailto:pnovack-gottsh...@ben.edu>>? I'm trying to find out how each program handles a particular statistical test. My question can likely be answered with a quick check of the help documentation for the software or by running a sample data set I can provide, if interested. Thanks, Phil ~ Phil Novack-Gottshall, PhD Professor pnovack-gottsh...@ben.edu<mailto:pnovack-gottsh...@ben.edu> Department of Biological Sciences Benedictine University 5700 College Road Lisle, IL 60532 Office: 332 Birck Hall Lab: 316 Birck Hall Phone: 630-829-6514 Fax: 630-829-6547 https://pnovack-gottshall.wixsite.com/home Spring 2019 office hours: Tues/Thurs 9:30-11:00 AM Wed 10 AM - 12:15 PM If you have urgent academic advising questions, please contact Anne Baysinger (Birck 130) ~ -- MORPHMET may be accessed via its webpage at http://www.morphometrics.org --- You received this message because you are subscribed to the Google Groups "MORPHMET" group. To unsubscribe from this group and stop receiving emails from it, send an email to morphmet+unsubscr...@morphometrics.org<mailto:morphmet%2bunsubscr...@morphometrics.org>. -- ~ Phil Novack-Gottshall, PhD Professor pnovack-gottsh...@ben.edu<mailto:pnovack-gottsh...@ben.edu> Department of Biological Sciences Benedictine University 5700 College Road Lisle, IL 60532 Office: 332 Bir
[MORPHMET] Statistics software question
Hi all, Apologies for cross-posting, but I'm not sure where this best lands. I'm trying to find people who have access to (preferably some experience with) any of the following statistical software programs: -MiniTab -SAS -SPSS -S-Plus -STATA -SYSTAT If you do, might you contact me off-list ? I'm trying to find out how each program handles a particular statistical test. My question can likely be answered with a quick check of the help documentation for the software or by running a sample data set I can provide, if interested. Thanks, Phil ~ Phil Novack-Gottshall, PhD Professorpnovack-gottsh...@ben.edu Department of Biological Sciences Benedictine University 5700 College Road Lisle, IL 60532 Office: 332 Birck Hall Lab: 316 Birck Hall Phone: 630-829-6514 Fax: 630-829-6547 https://pnovack-gottshall.wixsite.com/home Spring 2019 office hours: Tues/Thurs 9:30-11:00 AM Wed 10 AM - 12:15 PM If you have urgent academic advising questions, please contact Anne Baysinger (Birck 130) ~ -- MORPHMET may be accessed via its webpage at http://www.morphometrics.org --- You received this message because you are subscribed to the Google Groups "MORPHMET" group. To unsubscribe from this group and stop receiving emails from it, send an email to morphmet+unsubscr...@morphometrics.org.
[MORPHMET] Grants for early career paleontologists
Hi all, I would like to draw your attention to the Norman Newell Grant for early career paleontologists whose deadline is Feb. 1, 2019 and fast approaching. The grant is funded by the Paleontological Society (PS) and applicants must be current members of the PS at the time of application. Eligible applicants include paleontologists within five years of their Ph.D., who are members in good standing of the Paleontological Society. Applications are encouraged from anywhere in the world, except those from countries with economic or trade sanctions imposed by the U.S. Office of Foreign Assets Control (OFAC). The Norman Newell grants complement the Arthur Boucot grants, and preference is therefore given to research projects in areas not covered by the Arthur Boucot grant topical areas of morphology, taxonomy, and biostratigraphy. Applicants can only apply to one of these Early Career Grants per funding year. To broaden the reach of Paleontological Society funds, recipients of a Norman Newell grant may not apply for an Arthur Boucot grant, nor may they apply for a second Norman Newell grant. Similarly, recipients of an Arthur Boucot grant may not apply for a Norman Newell grant. Four Norman Newell grants of $5,000 each will be made each year. Awards are made directly to individuals and not to institutions, and awards cannot be used for salary, stipends, tuition, or institutional overhead. Application instructions (including downloadable form and details on two required letters of recommendation) and complete grant details are available at http://paleosoc.org/grants-and-awards/paleontological-society-newell-grant/ Information for the complementary Paleontological Society Arthur James Boucot Research Grants for early career paleontologists (with the same deadline) is available at https://paleosoc.org/grants-and-awards/paleontological-society-arthur-james-boucot-research-grants/ Apologies for cross-posting but we would like to have a large pool of applicants. Feel free to forward to qualified candidates. Sincerely, Phil (on behalf of the Newell Grant Committee of the Paleontological Society) -- ~ Phil Novack-Gottshall, PhD Professorpnovack-gottsh...@ben.edu Department of Biological Sciences Benedictine University 5700 College Road Lisle, IL 60532 Office: 332 Birck Hall Lab: 316 Birck Hall Phone: 630-829-6514 Fax: 630-829-6547 https://pnovack-gottshall.wixsite.com/home Spring 2019 office hours: Tues/Thurs 9:30-11:00 AM Wed 10 AM - 12:15 PM If you have urgent academic advising questions, please contact Anne Baysinger (Birck 130) ~ -- MORPHMET may be accessed via its webpage at http://www.morphometrics.org --- You received this message because you are subscribed to the Google Groups "MORPHMET" group. To unsubscribe from this group and stop receiving emails from it, send an email to morphmet+unsubscr...@morphometrics.org.
[MORPHMET] Job opening in vertebrate anatomy
Hi all, See below for a possibly paleo-relevant job opening. Feel free to contact me with general questions, but for search-related questions, please contact our assistant Krista Frickelton (e-mail below), who will forward to the search chair. Sincerely, Phil ~~ Open Tenure Track Position, Biological Sciences Appointment to begin Fall 2019 The College of Science at Benedictine University invites applications for a full time, tenure track assistant professor position in the Department of Biological Science beginning fall 2019. The department is seeking a candidate who has research interests and teaching expertise in at least one of the following areas: biomechanics, vertebrate biology, evolutionary or developmental biology. The position requires teaching a cadaver-based anatomy course and other courses within our core curriculum. The successful candidate will establish and participate in faculty/student research at the undergraduate level. Candidates are expected to maintain an active research program. The Department of Biological Sciences consists of 15 full time faculty members and houses three undergraduate biology programs: BS in Biology, BS in Health Science, and BA in Biology. There are over 600 undergraduate majors in the department with the majority of students seeking to pursue professional health degrees. We also have two Master’s programs in Clinical Exercise Physiology and Integrative Physiology. Our current faculty have expertise in physiology, ecology, microbiology, neurobiology, molecular biology, genetics, biological anthropology, and paleobiology. Founded as a Catholic university in 1887, Benedictine University is located in Lisle, Illinois 25 miles west of Chicago with additional campuses in Mesa, Arizona and Springfield, Illinois. Benedictine University seeks employees who, regardless of their religious affiliation, understand and contribute to the University’s mission and goals. As an institution, we are committed to our identity as Catholic and Benedictine in our values, our operations, and our curriculum in an effort to help each student, each employee, the local community, and each other thrive academically, professionally, and personally in our religiously and culturally diverse academic environment. The College of Science enjoys a location in the research corridor of metropolitan Chicago, and delivers nationally recognized undergraduate programs in the sciences. Required Qualifications: Earned Ph.D.; a minimum of one year postdoctoral experience is preferred. Successful prior experience teaching undergraduates and a strong commitment to involving undergraduates in research are required. Application Deadline: Applications will be accepted until the position is filled, but priority will be given to those applications received by December 17, 2018. Application Process: Interested applicants should submit a cover letter, curriculum vitae, names of five people who can be contacted confidentially as references, unofficial graduate transcripts, statement of teaching philosophy, and statement of research interest through Academic Jobs Online at http://academicjobsonline.org/ajo. Any questions regarding the application process should be directed to: Krista Frickelton, College of Science, Benedictine University, 5700 College Road, Lisle, IL 60532. Email: kfrickel...@ben.edu Fax: (630) 829–6547. Benedictine University does not discriminate in its admissions or educational policies, programs or activities; scholarship and loan programs; athletic and other University administered programs or employment practices on the basis of race, creed, color, national origin, sex, sexual orientation, age, disability, military or veteran status, marital status, citizenship, or any other characteristic protected by applicable law. The laws applicable to Benedictine University include constitutional and statutory protections of the University's rights as a religiously sponsored institution. This policy of equal employment opportunity applies to all employment and personnel practices including, but not limited to, recruiting, hiring, promotion, training and compensation. In compliance with federal law, all persons hired will be required to verify identity and eligibility to work in the United States and to complete the required employment eligibility verification document form upon hire. Benedictine University is an Equal Opportunity Employer -- ~ Phil Novack-Gottshall, PhD Professorpnovack-gottsh...@ben.edu Department of Biological Sciences Benedictine University 5700 College Road Lisle, IL 60532 Office: 332 Birck Hall Lab: 316 Birck Hall Phone: 630-829-6514 Fax: 630-829-6547 https://pnovack-gottshall.wixsite.com/home Fall 2018 office hours: Tues/Thurs 9-9:30, 1:30-2:30 Wed 10-10:30, 11:30-12:15 &
[MORPHMET] Early Career Research Grants available from the Paleontological Society
[Apologies if duplicated announcement; feel free to disseminate to additional venues.] Greetings, We would like to draw your attention to two Paleontological Society grants for early career paleontologists with upcoming deadlines, the Arthur James Boucot Research Grant and the Norman Newell Research Grant. These grants support original research to postdoctoral students, assistant professors (pre-tenure), and other early-career paleontologists associated with universities, institutes, and academies of science or equivalent institutions. The deadline for both is Feb. 1, 2018. The Arthur James Boucot Research Grants support research on the morphology, taxonomy, and biostratigraphy of any taxa, preferably with some combination of these approaches and a significant fieldwork component. Research focused on modeling studies that rely on fossil or modern databases will not be funded. The Norman Newell Research Grants complement the Arthur Boucot grants, and preference is therefore given to research projects in areas not covered by the Arthur Boucot grant topical areas. Applications are encouraged from anywhere in the world, except those from countries with economic or trade sanctions imposed by the U.S. Office of Foreign Assets Control (OFAC). Detailed instructions, proposal templates, and instructions for two letters of recommendation are available at paleosoc.org/grants-and-awards/#professionalgrants If you have questions, please contact the Chair for each grant: Dr. Sally E. Walker (swal...@gly.uga.edu) for the Arthur Boucot grant and Dr. Phil Novack-Gottshall (pnovack-gottsh...@ben.edu) for the Norman Newell grant. Sincerely, Phil -- ~ Phil Novack-Gottshall, PhD Associate Professor pnovack-gottsh...@ben.edu Department of Biological Sciences Benedictine University 5700 College Road Lisle, IL 60532 Office: 332 Birck Hall Lab: 316 Birck Hall Phone: 630-829-6514 Fax: 630-829-6547 http://www.ben.edu/faculty/pnovack-gottshall Spring 2018 office hours: Tues/Thurs 9-9:30, 3:00-4:15 Wed 10:00-12:15 ~ -- MORPHMET may be accessed via its webpage at http://www.morphometrics.org --- You received this message because you are subscribed to the Google Groups "MORPHMET" group. To unsubscribe from this group and stop receiving emails from it, send an email to morphmet+unsubscr...@morphometrics.org.
Re: [MORPHMET] Re: Stability of p-values (physignal and testing for morphological integration)
There was a similar concern (about arbitrary p-values in simulations) expressed in a nice, recent Oikos paper, too: White, J. W., A. Rassweiler, J. F. Samhouri, A. C. Stier, and C. White. 2014. Ecologists should not use statistical significance tests to interpret simulation model results. Oikos 123(4):385-388. I think some of the concerns are also wise to heed for those doing resampling. It's always worth doing a quick sensitivity analysis (running the resampling algorithm for increasing numbers of replicates) to identify the point at which p-values (or other stats you're interested in) become stable. But there's no need to run huge replicates if they're not needed. See p. 40 in the paper below (focused more on general paleontological applications than morphometrics) for discussion and recommendations on this issue, with some advice from the literature. The online supplement at http://www.paleosoc.org/shortcourse2010/Resampling_KandN-G_Appendices_Oct11.doc has some (clunky) sample R code (section 2.8) demonstrating this. Kowalewski, M., and P. Novack-Gottshall. 2010. Resampling methods in paleontology. Pp. 19-54. In J. Alroy, and G. Hunt, eds. Quantitative Methods in Paleobiology. Short Courses in Paleontology 16. Paleontological Society and Paleontological Research Institute, Ithaca, NY. Cheers, Phil On 6/2/2015 11:47 PM, Tsung Fei Khang wrote: Dear community, Many thanks to everyone who responded with your opinions and also references. I think the set.seed solves the reproducibility problem, and for practicality, I would just set seed, make a single run at a high number of replicates such as 10,000, and then report a reasonable upper bound for the p-value (e.g. p-value 0.01 if I get something like 0.0068). @Aki: Thank you. 1/#iterations is problematic because one could then get arbitrarily small p-values... should converge to some value (however small) as the number of iterations exceeds some threshold, which is dependent on data set. On Tuesday, June 2, 2015 at 3:48:37 PM UTC+8, Tsung Fei Khang wrote: Dear community, I would like to share my experience with using some (really cool) computational tools for phylogenetic signal and morphological integration analysis. I am using physignal (geomorph R package) and the Phylo.Morphol.PLS function provided in the paper by Adams and Felice (2014; PLoS ONE, 9:e94335) in my work. I noticed that if the same analysis is rerun for a particular number of iterations, the results may vary. Additionally, I observed that increasing the number of iterations, up to some critical point, may push down the p-value, depending on data set (didn't happen with the plethspecies (9 species) data, but happened in my data set - 13 species, not salamanders). I attach runs (10 times) for both data sets for iterations of 100, 1000, 1 and 10 here for Phylo.Morphol.PLS. Note that some kind of stable results is attained after 1000 iterations (default) for the plethspecies data, but for my case, which needs 1. I think the notion that p-values returned from a permutation method are actually realizations of random variables with a certain mean and variance may not be familiar to many biologists, who are accustomed to expect a reproducible p-value when the same data set is rerun using common statistical tests. Perhaps in a future version the authors of the code can implement a checker within the functions that checks the number of iterations for attaining convergence, so that a more stable p-value is returned? PENAFIAN: E-mel ini dan apa-apa fail yang dikepilkan bersamanya (Mesej) adalah ditujukan hanya untuk kegunaan penerima(-penerima) yang termaklum di atas dan mungkin mengandungi maklumat sulit. Anda dengan ini dimaklumkan bahawa mengambil apa jua tindakan bersandarkan kepada, membuat penilaian, mengulang hantar, menghebah, mengedar, mencetak, atau menyalin Mesej ini atau sebahagian daripadanya oleh sesiapa selain daripada penerima(-penerima) yang termaklum di atas adalah dilarang. Jika anda telah menerima Mesej ini kerana kesilapan, anda mesti menghapuskan Mesej ini dengan segera dan memaklumkan kepada penghantar Mesej ini menerusi balasan e-mel. Pendapat-pendapat, rumusan-rumusan, dan sebarang maklumat lain di dalam Mesej ini yang tidak berkait dengan urusan rasmi Universiti Malaya adalah difahami sebagai bukan dikeluar atau diperakui oleh mana-mana pihak yang disebut. DISCLAIMER: This e-mail and any files transmitted with it (Message) is intended only for the use of the recipient(s) named above and may contain confidential information. You are hereby notified that the taking of any action in reliance upon, or any review, retransmission, dissemination, distribution, printing or copying of this Message or any part thereof by anyone other than the intended recipient(s) is strictly prohibited. If you have received this Message in error, you should delete this Message immediately and advise the sender
[MORPHMET] Recommendations for sticky substances
Hi all, I'm looking for any recommendations for binding agents that are useful for holding fossil specimens for morphometric and laser scanning purposes. I've used art putty in the past, but many have oils that stain the specimens, or stick within tiny pores. I've heard some use sticky putty or 3M double-sided tape with some success. Ideally we want something that is a strong bond so that we can move the stage with the specimen on it, but won't leave any residue on the specimen. The fossils tend to be fist sized or smaller (Paleozoic invertebrates mostly), but can sometimes have some mass to them. Do any of you have any other recommendations or experiences? Thanks, Phil -- ~ Phil Novack-Gottshall Associate Professor Department of Biological Sciences Benedictine University 5700 College Road Lisle, IL 60532 pnovack-gottsh...@ben.edu Phone: 630-829-6514 Fax: 630-829-6547 Office: 332 Birck Hall Lab: 316 Birck Hall http://www1.ben.edu/faculty/pnovack-gottshall ~ -- MORPHMET may be accessed via its webpage at http://www.morphometrics.org To unsubscribe from this group and stop receiving emails from it, send an email to morphmet+unsubscr...@morphometrics.org.
