search for: voxel

After many months, I am now banging my head against the wall because I can't find a solution to this seemingly trivial problem.  Any help would be appreciated: I am trying to apply a nonlinear fitting routine to a 3D MR image on a voxel-by-voxel basis.  I've tested the routine using simulated data and things went well.  As for the real data, the fitting routine works variably.  By variably, I mean the following:   with a specific set of starting parameters the routine would work for the firs...

Hi everyone, I'm not exactly sure how to ask this question most clearly, but I hope that giving the context in which it occurs for me will help: I'm trying to compare the brain images of two patient populations; each image is composed of voxels (the 3D analogue of pixels), and I have two images per patient, one reflecting grey matter concentration at each voxel, and the other reflecting white matter concentration at each voxel. I determined the groups by means of an analysis that involved information from both types of images, and what...

...I have a question about the Package DierckxSpline. I have tried to find the answer by myself but it didn't worked out. I wondered if Dierckxspline can use different sets of y values in one time to fit a line with knot. I have different sets of Y values representing the same thing for different voxels (in an fmri image). I have already fitted the data in different graphs and I know now that the plots are comparable for the different data sets (so for the different voxels) but I wanted to include all the information in one plot, If it's possible. So I want to know the best fitting line for t...

...andom factor B (subject), and a covariate (age) with a model like this MyResult <- lmer(Response ~ FactorA + Age + (1 | subject), MyData, ...) My input data are like this: For each subject I have a file (a huge matrix) storing the response values of the subject at many locations (~30,000 voxels) corresponding to factor A at the 1st level, another file for factor A at the 2nd level, and a 3rd file for factor A at the 3rd level. Then I have another file storing the age of those subjects. The analysis with the linear mixed model above would be done at each voxel separately. It seem...

...ity based on a third measure. One way to do that would be to color these differently, and use an opacity measure to display the third measure. An example of what I am trying to do is at: http://www.public.iastate.edu/~maitra/papers/mrm02.pdf page 26, for instance. There are two different kinds of voxels, given by greens and red. At the low end, there is transparency on the red scale and at the upper end there is opacity in the red and the green. A simpler example involving only one kind of voxels is on page 24 of the same paper. Either way, that figure was done using Matlab, but I was wondering...

...o you mean by does not work? >>> ?Dependencies problems? >> >> No, package qemu availabe. >> >> yum install qemu >> Loaded plugins: fastestmirror, refresh-packagekit, security >> Loading mirror speeds from cached hostfile >> * base: mirrors.sin3.sg.voxel.net >> * epel: ftp.riken.jp >> * extras: mirrors.sin3.sg.voxel.net >> * rpmforge: mirror.oscc.org.my >> * rpmfusion-free-updates: ftp.upjs.sk >> * rpmfusion-free-updates-testing: ftp.upjs.sk >> * updates: mirrors.sin3.sg.voxel.net >> Setting up Install Proc...

...th my chart something like 3 MO and slow on the screen to appear I guess for the same reason. It seems that the driver writes in the file everything even parts from graph that are in background and will be cover by an upper level and make the file really huge. Then the graph is split in small voxel according to the size of the matrix in input, all this voxel are also written in the output but not really efficiently. Because I guess the output should during rendering write the complete level instead of all voxel that make the file so big and slow to appear on the screen. Also the function...

Hi I have the following array: test <- array(c(1:16), dim = c(3,4,3)) test ## I call some enries using an index array test.ind <- array(rbind(c(1,2,1), c(3,3,2)), dim = c(2,3)) test[test.ind] ## suppose I want all values in the 2nd row and 4th col over ## all three 3rd dimensions test[2,4,] how to specify a test.ind array with the last index left with ',' i.e test.ind should be

Hi, I am new to R, and am trying to solve the following optimization problem: This is a nonlinear least squares problem. I have a set of 3D voxels. All I need is to find a least squares fit to this data. The data model actually represent a cube-like structure, consisting of seven straight lines. The lines have some intersections (and at this intersection both of the participating lines end). Please note that I need something (some routines,...

...667, -0.166666667,-0.25,-0.166666667) x<-( c(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26, 27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51, 52,53,54,55,56,57,58,59,60,61,62,63,64)) x<-x/64 par(mfrow=c(1,1)) plot(x,brain,xlab="Voxel",ylab="Activity",main="fMRI Data") wdbrain<-wd(brain,4,family="DaubExPhase", bc="periodic") thres2<-threshold(wdbrain,levels=3:(wdbrain$nlevels-1), type="soft", policy="manual", by.level=FALSE, value=7.32032, dev=var, b...

...i.df) kicked.out<-(length(filtervector) - sum(filtervector))/length(filtervector) print(kicked.out) matrix.col = matrix.col + 1 attach(final.roi.df) names(final.roi.df) print(matrix.col) #set cutoff for FDR. per voxel p values (of Z dist) .05 = 1.96, .01 = 2.575, .001 = 3.277, .005 = 3.479 BE SURE TO CHANGE THE VARIABLE EACH TIME YOU CHANGE CONDITION pre.outliers<-subset(final.roi.df, gFDR4FWHM >= 1.96) detach(final.roi.df) attach(pre.outliers)...

...; # yum search odbc | grep -E "my|mar" > mysql-connector-odbc.x86_64 : ODBC driver for MySQL > > [root at ec-ast unixodbcproblem]# yum info mysql-connector-odbc.x86_64 > Loaded plugins: fastestmirror > Loading mirror speeds from cached hostfile > * base: mirrors.lga7.us.voxel.net > * epel: epel.mirror.constant.com > * extras: mirror.atlanticmetro.net > * updates: mirror.atlanticmetro.net > Installed Packages > Name : mysql-connector-odbc > Arch : x86_64 > Version : 5.2.5 > Release : 6.el7 > Size : 427 k > Rep...

....x86_64 openssl-libs-1.0.1e-34.el7_0.4.x86_64 pcre-8.32-12.el7.x86_64 xz-libs-5.1.2-8alpha.el7.x86_64 zlib-1.2.7-13.el7.x86_64 Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile * base: mirror.es.its.nyu.edu * extras: mirror.cs.pitt.edu * updates: mirrors.lga7.us.voxel.net --> Running transaction check ---> Package e2fsprogs-debuginfo.x86_64 0:1.42.9-4.el7 will be installed ---> Package gcc-debuginfo.x86_64 0:4.8.2-16.el7 will be installed --> Processing Dependency: gcc-base-debuginfo = 4.8.2-16.el7 for package: gcc-debuginfo-4.8.2-16.el7.x86_64 ---&g...

I get the same symptom when trying to upgrade from the Adobe repo on Fedora 20. On 12/16/2014 01:40 PM, Bill Maltby (C4B) wrote: > On Tue, 2014-12-16 at 12:33 -0600, kqt4at5v at gmail.com wrote: >> On Tue, 16 Dec 2014, m.roth at 5-cent.us wrote: >> >>> kqt4at5v at gmail.com wrote: >> <snip> >> What am I doing wrong? >> >> # yum update

...stalled and librrd is there. But for some reason when I go to install this package it doesn't see that it is. [root at VIRTCENT11:/usr/local/src/ganglia-3.2.0] #yum install ganglia-gmetad Loaded plugins: fastestmirror, security Loading mirror speeds from cached hostfile * base: mirrors.lga7.us.voxel.net * epel: serverbeach1.fedoraproject.org * extras: mirror.umoss.org * rpmforge: fr2.rpmfind.net * updates: mirror.atlanticmetro.net Excluding Packages in global exclude list Finished Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package ganglia-gme...

Guys, Is there a difference between CentOS 6.0 and centos 6 on the mirror list? Each mirror seems to have a folder for 6.0 and 6 separately. http://mirrors.lga7.us.voxel.net/centos/

Is there any way to restrict disk use per domain with XEN PV? Thanks. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users

So anyway, I have been using linux for years now, currently Fedora 12, and just recently I opened a box and found several of my old windows games. Starcraft, Heroes, Age of Empires, Stronghold, etc, some of which I installed. Then I came to Masters of Orion. This game I figured my crappy netbook could handle, and I get a bunch of "??????????" s in place of the actual text in the

CRAN (and crantastic) updates this week New packages ------------ * bdoc (1.0) Michael Anderson http://crantastic.org/packages/bdoc This package contains a function that will classify DNA barcodes as well as a few test and reference data sets. * bdsmatrix (1.0) Terry Therneau http://crantastic.org/packages/bdsmatrix This is a special case of sparse matrices, used by coxme and

...odbc5w.so[7ff09988d000+47000] # yum search odbc | grep -E "my|mar" mysql-connector-odbc.x86_64 : ODBC driver for MySQL [root at ec-ast unixodbcproblem]# yum info mysql-connector-odbc.x86_64 Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirrors.lga7.us.voxel.net * epel: epel.mirror.constant.com * extras: mirror.atlanticmetro.net * updates: mirror.atlanticmetro.net Installed Packages Name : mysql-connector-odbc Arch : x86_64 Version : 5.2.5 Release : 6.el7 Size : 427 k Repo : installed >From repo : base Summar...