search for: neuroscience

Hi all, I've noticed that many computational neuroscience research groups use MATLAB. While it's possible that MATLAB may have some features unavailable in R, I suspect that this may instead simply be a case of costly tradition, where researchers were taught MATLAB as students and pay for it as researchers because it's all they know. I'd like...

A recent paper on visualisation (in Neuron, a leading neuroscience journal) surveyed how well previous articles in this journal labelled their graphs (e.g. axis labelling and describing their error bars). Of particular interest is that (only) 40% of plots labelled what their colorkey was showing (variable and units). The paper is at http://dx.doi.org/10.1016/j.n...

...e trabajo, pero si en ésta tengo varios áreas de trabajo guardados, p.e. a.RData y b.RData, ¿cómo podría saber en cuál estoy trabajando si por un despiste no me acordara cuál he abierto anteriormente (sin tener que abrir a.RData y b.RData)? ¡Muchas gracias! Klaus. Klaus Langohr Statistician, PhD Neurosciences Research Programme Human Pharmacology and Clinical Neurosciences Research Group IMIM-Hospital del Mar Barcelona Biomedical Research Park Doctor Aiguader, 88 | 08003 Barcelona Tel. +34/ 933 160 458 | Fax +34/ 933 160 467 klangohr@imim.es<mailto:klangohr@imim.es> | www.imim.cat<http://www....

...ere on the desktop and R does not know where it is...I can¹t figure out how to organize the files...When I type ?sem in R it says object sem not found...I can¹t seem to find help on the web on how to set-up the packages.... Well, thanks in advance __________________ Patrick Bedard Ph.D. Dept. of Neuroscience Brown University [[alternative HTML version deleted]]

Does anyone know how to graph a line according to a specified equation? I'd like to plot the following hyperbola: Y=139.35/(1+(0.174*X)) I know there's a way to do this, but I'm having a ridiculous time trying to remember how. Thanks! Kyle H. Ambert Department of Behavioral Neuroscience Oregon Health & Science University [[alternative HTML version deleted]]

...tp://www.r-project.org/other-projects.html -> link to Jim Lindsey's R page. I believe the correct/new URL should be: http://www.commanster.eu/rcode.html Best, Wolfgang -- Wolfgang Viechtbauer, Ph.D., Statistician Department of Psychiatry and Psychology School for Mental Health and Neuroscience Faculty of Health, Medicine, and Life Sciences Maastricht University, P.O. Box 616 (VIJV1) 6200 MD Maastricht, The Netherlands +31 (43) 388-4170 | http://www.wvbauer.com

...rd column. However, because this is in a loop I need a way to first determine which columns are all zeros, and only then remove them. I.e., I don't know which column of x contains all zeros until after x is created. Thanks! Anthony -- Anthony Steven Dick, Ph.D. Post-Doctoral Fellow Human Neuroscience Laboratory Department of Neurology The University of Chicago 5841 S. Maryland Ave. MC-2030 Chicago, IL 60637 Phone: (773)-834-7770 Email: adick at uchicago.edu Web: http://home.uchicago.edu/~adick/

...h R CMD INSTALL pwr. I have also tried installing it on my mac mini running Leopard but it can't even find the packages object, and CMD INSTALL pwr returns "invalid package 'pwr'". Expedient help would be appreciated :-) Brian Mingus Graduate student Computational Cognitive Neuroscience Lab University of Colorado at Boulder [[alternative HTML version deleted]]

...F-8 attached base packages: [1] stats graphics grDevices utils datasets methods [7] base loaded via a namespace (and not attached): [1] tools_2.10.1 Thanks for any enlightenment. best, Ken -- Ken Knoblauch Inserm U846 Stem-cell and Brain Research Institute Department of Integrative Neurosciences 18 avenue du Doyen L?pine 69500 Bron France tel: +33 (0)4 72 91 34 77 fax: +33 (0)4 72 91 34 61 portable: +33 (0)6 84 10 64 10 http://www.sbri.fr/members/kenneth-knoblauch.html

Has anyone plotted or is it possible to plot CIE *xy* chromaticity diagram http://en.wikipedia.org/wiki/File:CIE1931xy_blank.svg I need this plot in color. ishida [[alternative HTML version deleted]]

...ake: *** [monitor_fdpass.o] Error 1 Dave Foster =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= David Foster National Center for Microscopy and Imaging Research Programmer/Analyst University of California, San Diego dfoster at ucsd.edu Department of Neuroscience, Mail 0608 (858) 534-7968 http://ncmir.ucsd.edu/ =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= "The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore, all progress depend...

...ords, strip off the upper 6 bits (using a logical AND, leaving a ten bit word), and then write the ten bit number in text form for R. Assuming that R can't do this, is PERL appropriate? Thanks. Derek N. Eder G?teborg University (privat) Institute of Clinical Neuroscience, Landerigatan 2 Section of Psychiatry SE 416 70 SU/Sahlgrenska University Hospital G?teborg, Sweden SE 413 45 G?teborg, Sweden tlf +46 (31) 25 40 66 tlf: +46 (31) 34 - 26139 fax: +46 (31) 3182 8163 derek.eder at neuroscience.gu.se -.-.-.-....

...he help listing for plot, and doesn't work, either. If it has been deprecated, what is the replacement? That is, how does one overlay an existing plot? -- John R. Vokey, PhD Professor B.E.R.G. - Behaviour and Evolution Research Group Micro-Cognition Laboratory Department of Psychology & Neuroscience University of Lethbridge Lethbridge, Alberta T1K 3M4 CANADA

...the non central parameter of a t distribution (equivalent of the TnoncT function from SAS), given /x/ a value from a t distribution, /df /the degrees of freedom and /p/ the probability of x under this distribution. Thanks a lot, Matthieu -- Matthieu Dubois, /Ph.D/. /Student/ Cognitive Neuroscience Unit, UCL, Belgium [[alternative HTML version deleted]]

Does anyone know if the sem package in R can implement a stacked model comparison, for example as in LISREL or AMOS? Thanks, Anthony -- Anthony Steven Dick, Ph.D. Post-Doctoral Fellow Human Neuroscience Laboratory Department of Neurology The University of Chicago 5841 S. Maryland Ave. MC-2030 Chicago, IL 60637 Phone: (773)-834-7770 Email: adick at uchicago.edu Web: http://home.uchicago.edu/~adick/

Hello- If I input a variance-covariance matrix and specify NA for start values, how does sem determine the start value? Is there a default? Anthony -- Anthony Steven Dick, Ph.D. Post-Doctoral Fellow Human Neuroscience Laboratory Department of Neurology The University of Chicago 5841 S. Maryland Ave. MC-2030 Chicago, IL 60637 Phone: (773)-834-7770 Email: adick at uchicago.edu Web: http://home.uchicago.edu/~adick/

.... -- Gregory Jefferis, PhD Division of Neurobiology MRC Laboratory of Molecular Biology, Hills Road, Cambridge, CB2 0QH, UK. http://www2.mrc-lmb.cam.ac.uk/group-leaders/h-to-m/g-jefferis http://www.neuroscience.cam.ac.uk/directory/profile.php?gsxej2 http://flybrain.stanford.edu

...geno) > elemconc$region = factor(elemconc$region) > for (i in as.character(levels(elemconc$region))) { + densityplot(data=elemconc, ~conc, subset=region==i) + } -- Kaiyin Zhong ------------------------------------------------------------------------------------------------------------------ Neuroscience Research Institute, Peking University, Beijing, P.R.China 100038 [[alternative HTML version deleted]]

...ere it is more appropriate. **Please reply privately if you wish to reply to me.**** Note: The Button commentary is a good quick summary if you don't want to go through the NATURE paper. Cheers, Bert Button, Ioannidis et al, ?Power failure: why small sample size undermines the reliability of neuroscience? http://www.nature.com/nrn/journal/vaop/ncurrent/full/nrn3475.html A commentary by his co-author, Kate Button: http://www.guardian.co.uk/science/sifting-the-evidence/2013/apr/10/unreliable-neuroscience-power-matters The headline from this coverage is more blunt: ?Most brain science pap...

...t (Ruby 1.87, Rails 2.3.8) the following code works fine: <%= select "applicant", "member_1", option_groups_from_collection_for_select(@topics, :members, :topic, :id, :name, @applicant.member_1), {:include_blank => true} %> Producing: <optgroup label="Clinical Neuroscience"> <option value="1">Prof ...</option> <option value="2">Prof ... </option> ... </optgroup> Yet in my production environment (Ruby 1.8.7, Rails 2.3.2) this code produces really weird output, sticking the previous output into an option value...