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Hello. I have looked at R Site Search for this problem, and it didn't give me exactly what I needed. Consider this dataset called "results". It has the following information: Student Day Subject Score Mary 1 Math Failed David 2 Science Passed Bob 4 Reading Passed Marie 4

Hello all. I'm confused a bit about contour plots. After reading the help at "?contour", it seems as though the contour plot is for 3D plots (x,y, and z). My data is in the form of grid coordinates (x,y), and I want to see a contour plot of the data so that I can tell where most observations lie. My question is simple but still evasive. Say my data is called places. One column

Good morning all! I am attempting to superimpose a moving-average smoother onto a graph of daily plots. These plots (in table[,2] below) span about 350 days and looks very noisy. I'd like for this smoother to plot the average of each group of 7 consecutive days (weekly) and show a line which joins these series of averages. Given the definition of MA, the first and last points will

Hello. I am having the worst time converting x-axis date ticks to real dates. I have tried several suggestions in online help tips and books to no avail. For example, the x-axis has 0, 50, 100, etc, and I want it to have "6/17/03", "8/6/03" etc. See attached (sample). Can anybody help me with this. Here's my code: ts.plot(date.attackmode.table[,1],

Hey, Rers I am new to R and this question may has been asked many times or a very old one.?I have checked the archive but found nothing (maybe I used?the wrong key words).?any advise is appreciated the question is: I try to replace a col vector with some other values, see edu<-matrix(0,1000,2) edu1<-runif(1000,0,1) edu[,1]<-edu1 the colum ?vector?edu[,1]? would?have value

hey, Rers in Stata therer is a loop command ` ' which could do the following: forvalue i=1/10 { ?gen?x`i'=expression } this will generate variable: x1,x2,,,,,x10. so, does R have a corresponding one to this? And one more very basic question: after I open a file and modify it, such as generate some new variables and change some old ones, how to use the changed dataset in

Rers: I have some ecological data (stream velocity vs. % cover of submerged weeds) that shows strong evidence of a thresholding step-function, e.g. below some velocity, % cover ranges from 0% to 100% (with no apparent relationship to velocity within this range of velocities), but above a certain "threshold" velocity, the % cover does not appear to exceed, say, 10%. There are good

Hi dear Rers, I am using SSOAP package to access SOAP service at NCBI. I followed the example code in SSOAP but failed. > z <- .SOAP("http://www.ncbi.nlm.nih.gov/entrez/eutils/soap/soap_adapter.cgi", method="run_eInfo", db="pubmed", action = I("einfo")) Error: protect(): protection stack overflow what's wrong? Thanks very much. Regards

Hello fellow Rers, I have a no-doubt simple question which is turning into a headache so would be grateful for any help. I want to do a principal components analysis directly on a correlation matrix object rather than inputting the raw data (and specifying cor = TRUE or the like). The reason behind this is I need to use polychoric correlation coefficients calculated with John Fox's

Hi Rers, I have a poission time series model with 5 parameters. I just wanted to remove two of the lag on response in the model and put it as a system model. I am not sure about the codes to combine these two on R. If anybody has any R example (code), please post it. My original model: log(Y(t))~constant+b1*Y(t-1)+b2*Y(t-2)+b3*(variable1)+b4*(variable2)+e I would like to construct a

Rers: What is the preferred library/function for doing stratified random sampling from a dataset, given I want to control the number of samples (rather than the proportion of samples) per strata? Thanks! --j -- Jonathan A. Greenberg, PhD Postdoctoral Scholar Center for Spatial Technologies and Remote Sensing (CSTARS) University of California, Davis One Shields Avenue The Barn, Room

Hi there Rers I am trying a very basic stars plot: x<-matrix(c(1,4,3,1.1,2,3,4,3,1,1,5,2), ncol = 3, byrow = TRUE, >> dimnames=list(c("a","b","c","d"),c("x","y","z"))) > > stars(x, draw.segments = TRUE, radius=TRUE) > > Can anyone explain what I am seeing there - EACH of my plots should have 3 coloured

Dear Rers, is there a way to color counties on a full US map based on a criterion one establishes (i.e., all counties I assign the same number should be the same color)? I explored a bit and looks like the package "maps" might be of help. library(maps) One could get a map of the US: map('usa') One could get countries within a US state: map('county', 'iowa', fill

Fellow Rers, Please forgive me if I have posted this to the wrong R list serve. Over the course of the years that I have used R and participated in this list server, I have noted a large number of questions and answers that direct people to specific packages. The multitude of packages is one of the great strengths of R. Unfortunately there is no (or at least I am not aware of) any single source

Dear Rers, I have a function to barplot() a matrix, eg myfun <- function(x, ...) { barplot(x , ... )} (The real function is more complicated, it does things to the matrix first.) So I can do: m1 <- matrix(1:20,4) myfun(m1) myfun(m1, main="My title") I'd like to be able to add the number of rows of the matrix passed to the function to the "..." argument, eg

Rers: I installed R 2.9.0 from the Debian package manager on our amd64 system that currently has 6GB of RAM -- my first question is whether this installation is a true 64-bit installation (should R have access to > 4GB of RAM?) I suspect so, because I was running an rqss() (package quantreg, installed via install.packages() -- I noticed it required a compilation of the source) and

Rers, I have been using the function 'by' in such a manner: by(LogMetric, list(Loci.Number=Loci.Number, Code.Flag=Code.Flag), plot) with par(mfrow=c(5,3)) to produce a single R Graphics: Device with 14 different plots on it as described above in my 'by' statement. Thank you for helping me thus far. A similar command using 'tapply' can be written as well. My

I apologize that I've asked a similar question before, but being new to R I don't think I did a very good job of formating the question. I've included a text file since the date set is somewhat large. What I have is a huge string of numbers in a text file. The numbers are all separated by comma's and the groups are separated by a semicolon. What I would like to do is read each

I am performing some configuration testing on a kvm host. When installing a guest operating system is it advisable to place each instance in a separate lv or better to accept the default and store them on the root file system? Respecting lvm, does one configure lvs in a virtual server to take space from the main vg or does one allocate lv space from inside that allocated to the virtual instance?

Hello everyone, So I ran an anova with aov and then I want to run post-hoc comparisons but keep receiving this message : > no applicable method for "TukeyHSD" Here is my code: > d<-read.table("d.txt") > d > Obs subj Hand Gaze RT > 1 1 s1 1 1 401.4 > 2 2 s2 1 1 363.3...... > summary(ano <-