search for: hemisphere

How do we specify a contrast interaction matrix for an ANOVA model? We have a two-factor, repeated measures design, with Cue Direction (2) x Brain Hemisphere(2) Each of these has 2 levels, 'left' and 'right', so it's a simple 2x2 design matrix. We have 8 subjects in each cell (a balanced design) and we want to specify the interaction contrast so that: CueLeft>CueRght for the Right Hemisphere CueRght>CueLeft for the Left He...

Hi all, I have a strange problem and rigth now I can't figure out a solution. Trying to calculate an ANOVA with one between subject factor (group) and one within (hemisphere). My dependent variable is source localization (data). My N = 25. My data.frame looks like this: > ML.dist.stack subj group hemisphere data 1 1 tin left 0.7460840 2 2 tin left 1.0300600 3 3 tin left 0.8026865 <<SNIP>> 47 22 con r...

Why do I see this error? > library(stats) > require(stats) [1] TRUE > > tHSD <- TukeyHSD(aov) Error in TukeyHSD(aov) : no applicable method for "TukeyHSD" In case it helps: > aov Call: aov(formula = roi ~ (Cue * Hemisphere) + Error(Subject/(Cue * Hemisphere)), data = roiDataframe) Grand Mean: 8.195069 Stratum 1: Subject Terms: Residuals Sum of Squares 645.7444 Deg. of Freedom 7 Residual standard error: 9.604645 Stratum 2: Subject:Cue Terms: Cue Residuals Sum of...

Dear List, I have a richness data distributing across 20 N to 20 S latitude. (120 E-140 E longitude). I would like to draw the richness in the north hemisphere and a regression line in the plot (x-axis: latitude, y-axis: richness in the north hemisphere). The above demand is done using plot. Then, south hemisphere richness and regression are required to be generated using the same y-axis above but an x-axis on the left side of the y-axis. (The higher lat...

Dear Experts, I am new to R and unfortunately cannot start with a simply statistical analysis: I manually determined the volume of the right and left hippocampus in a group of meditators and in a group of controls. My data-sheet looks as follows: observation subject group age gender hemisphere volume 1 am04 m 25 f left 3.637 2 am04 m 25 f right 3.713 3 ao08 m 47 m left 3.715 4 ao08 m 47 m right 3.702 5 as11 m 43 f left 3.912 6 as11 m 43 f right 4.438 7 bn02 c 30 f left 4.497 8 bn02 c 30 f right 4.333 9 ca15 c 46 m left 3.346 10 ca15 c 46 m right 3.779 11 cd13 m 41 m left 4.167 12 cd13 m...

...er them a between-subject factor with 2 categorical levels (controls, patients). The dependent variable is a multivariate recording from 124 electrodes on the scalp, to measure electric potential from the scalp surface. These recordings are summarised into regional activity for the left and right hemisphere. So hemisphere is a within-subjects factor that has 2 levels (left and right). The last factor is an experimental manipulation, a visual task contains three types of events. This is a within-subjects factor with three levels (S1, S2, S3). Our planned comparisons are: 1. test the group mean d...

I'm trying to read in a CSV, with lines looking like: HEADER, Latitude DecDeg, Latitude Hemisphere, Longitude DecDeg, Longitude Hemisphere, Speed knots, Bearing Degrees, fixQualityGga, noOfSatGga, altGga, heightGga, selectionGsa, fixGsa, pdopGsa, hdopGsa, vdopGsa, noOfSatGsv, Time, *checkSum $GPS, 3747.0224, N, 12223.4522, W, 0.36, 348.21, 1, 3, 4.01, 175.5, -25.2, A, 2, 4.14, 4.01,...

...s the columns to get p(value is in y), and just taking the value for the density at x,y to get the joint probability p(x,y), then just applying formulas for mutual information…. I know it’s kludgy… does anyone have any idea as to what I’ve done wrong? The data is EEG sampled at 128hz from the left hemisphere (C3) and right hemisphere of the brain during neurofeedback sessions and enters via a bivariate time series to datin, and lmax is the maximum lag to measure the mutual information at. I hope to use it to set up optimal bivariate embeddings but also to measure the strength of the relationship betwee...

On Mon, Apr 25, 2016 at 9:32 AM, Timothy B. Terriberry <tterribe at xiph.org> wrote: > Jean-Marc Valin wrote: >> >> Would it make sense to allow an arbitrary number of channels and just >> "truncate" the list of channels. For example, two-channel ambisonics >> would be W plus X and three-channel would be W, X and Y. The idea is >> that you would get

...ng from SPSS to R for over a year now, but I realize now that I don't have the non-sphericity test and correction factors. The backgroud to this question is that I'm doing a psychophysics experiment and the data analysis uses an aov model that looks like this: roiAOV <- aov( roi ~ (Cue*Hemisphere) + Error(Subject/ (Cue*Hemisphere)), data=roiDataframe) where Cue is 2 levels (an arrow on a screen that points left or right) and Hemisphere is 2 levels (brain activity in the left or right cerebral hemisphere). There are 8 subjects and they all have one observation for all levels of Cue * Hemis...

...(e) is given by: e = 1/(k-1) so for k=2, we have e = 1 (ie, no correction of the F test df; see p. 46). These notes apply to a univariate F test. How do we estimate the minimum value of epsilon for a 2 factor ANOVA? I have an experiment where we measure brain activity from the left and right hemisphere, for two experimental conditions, in each subject. I consider the measures from each hemisphere a repeated measures factor (2 levels) and the experimental conditions is also a repeated measure (2 levels). The question now is, how do we calculate epsilon for this 2 factor study and is it possibl...

I've discussed hemispherical ambisonics and mixing matrices with a few people. The consensus is that there is no set of hemispherical basis functions common enough to warrant inclusion yet. We should force channel counts to be values (l + 1)^2 for simplicity and to keep the possibility open of including hemispherical bases should one ever become popular. As for mixing matrices, we are not

Hi Michael, On 04/25/2016 05:32 AM, Michael Graczyk wrote: > Channel Mapping Family 2 > > Allowed numbers of channels: (1 + l)^2 for l = 1...15. > > Explicitly 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, > 225. Ambisonics from first to fifteenth order. Would it make sense to allow an arbitrary number of channels and just "truncate" the list of

...aybe a POSIX[lc]t expert can comment? > > If I change the month from December to June then I see the same phenomenon in my Europe/Paris time zone. The issue seems to be that, for the date chosen for the test, Summer/daylight savings time is in force in NZ and some other parts of the southern hemisphere , but not in the northern hemisphere. > Of course! I overlooked that the date in the test is the issue, not the current date. (Let's blame that on the fact that Summer seems to have finally arrived in Copenhagen...) "svn praise" claims this test is due to Martin Maechler in r717...

Hi, I'm new to R (and math ;) Would somebody please be so kind as to direct me in plotting a 3D sphere? I tried something in the lines of: #### y <- x <- seq(-pi, pi, length=pi*10) f <- function(x,y) { z <- sqrt(pi - x^2 - y^2) #z[is.na(z)] <- 0 z } z <- outer(x, y, f) persp(x, y, z, theta = 120, phi = 30) #### I've also tried: .... make.surface.grid(...) ..

...IX[lc]t expert can comment? > > > > If I change the month from December to June then I see the same phenomenon in my Europe/Paris time zone. The issue seems to be that, for the date chosen for the test, Summer/daylight savings time is in force in NZ and some other parts of the southern hemisphere , but not in the northern hemisphere. > > > Of course! I overlooked that the date in the test is the issue, not the current date. (Let's blame that on the fact that Summer seems to have finally arrived in Copenhagen...) > "svn praise" claims this test is due to Martin M...

...of R packages and workflows using rgdal, rgeos and maptools need to put in train now before the packages are archived on CRAN. The first changes will occur in June 2023, and the retiring packages will be archived during October 2023. If you are giving a workshop or tutorial during the Northern hemisphere summer, aim for June. If you still need more assistance after reading the project materials, raise an issue on https://github.com/r-spatial/evolution/issues or email me (issue better, less likely to be overlooked). -- Roger Bivand Emeritus Professor Department of Economics, Norwegian School of...

...of R packages and workflows using rgdal, rgeos and maptools need to put in train now before the packages are archived on CRAN. The first changes will occur in June 2023, and the retiring packages will be archived during October 2023. If you are giving a workshop or tutorial during the Northern hemisphere summer, aim for June. If you still need more assistance after reading the project materials, raise an issue on https://github.com/r-spatial/evolution/issues or email me (issue better, less likely to be overlooked). -- Roger Bivand Emeritus Professor Department of Economics, Norwegian School of...

I am having trouble in Sweave with input line lengths. For example, I may have in my input file the chunk <<>>= BrainSections <- levels(AggData$sctn)[grep( "(^BRAIN)|(^WHOLEBRAIN)|(LEFT HEMISPHERE)| (HALFBRAIN)", levels(AggData$sctn))] @ This is translated in the tex file: \begin{Sinput} > BrainSections <- levels(AggData$sctn)[grep("(^BRAIN)|(^WHOLEBRAIN)|(LEFT HEMISPHERE)| (HALFBRAIN)", + levels(AggData$sctn))] \end{Sinput} The prob...

Full_Name: Arni Magnusson Version: 1.6.2 OS: Windows XP Submission from: (NULL) (210.48.49.68) Hi there. I'm experiencing unexpected behaviour from as.POSIXct: > as.POSIXct("1969-12-24") [1] "1969-12-23 23:00:00 New Zealand Standard Time" > as.POSIXlt("1969-12-24") [1] "1969-12-24" > as.POSIXlt("1969-12-24")+1 [1] "1969-12-23