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979 discussions - 3,368 posts

  • Hi all, My main Dell melted down a month ago and I need to buy a new workstation. It will be Win7 64 bit and fast graphics card with large RAM. For GIS (ArcGis) I am opting for 6 GB RAM. Is there any ...
    Neotropical bat risk assessmentsNeotropical bat risk assessments
    Mar 22, 2012 at 3:26 pm
    Mar 28, 2012 at 5:19 pm
  • I am having trouble reading this CSV file in R. There are six attributes that I need to read - CVar1, CVar2, Location, Year, Nvar3, Nvar4. Can somebody help in reading this file? On line 10 it has ...
    Ashish AgarwalAshish Agarwal
    Mar 16, 2012 at 11:03 am
    Mar 26, 2012 at 7:27 am
  • Here's the raw data I'm working with (will be available temporarily): http://dl.dropbox.com/u/41922443/dataout_2471_843.csv Next, here's the code I want to impose (error that I'm seeing SHOULD ...
    KnaveroKnavero
    Mar 14, 2012 at 11:57 am
    Mar 14, 2012 at 10:39 pm
  • Dear all, I created a bivariate normal distribution: set.seed(138813) n<-100 x<-rnorm(n); y<-rnorm(n) and plotted a scatterplot of it: plot(x,y) Now I'd like to add the 2D-standard deviation. I found ...
    DrflxmsDrflxms
    Mar 3, 2012 at 2:54 pm
    Mar 4, 2012 at 1:19 am
  • Hi R-users, I am trying to automate the daily running of a simple R script from Windows 7. scheduler. I can schedule my laptop to automatically open R at a certain time, but not to execute a script ...
    Vincent.deluardVincent.deluard
    Mar 5, 2012 at 4:55 pm
    Jul 4, 2012 at 8:47 am
  • Hi all, I am trying hard to do the following and have already spent a few hours in vain: I wanted to do the scatter plot. But given the high dispersion on those dots, I would like to bin the x-axis ...
    MichaelMichael
    Mar 10, 2012 at 12:37 am
    Mar 12, 2012 at 12:25 am
  • Dear R wizards: is there a clean way to assign to elements in a list? what I would like to do, in pseudo R+perl notation is f <- function(a,b) list(a+b,a-b) (c,d) <- f(1,2) and have c be assigned 1+2 ...
    Ivo welchIvo welch
    Mar 30, 2012 at 10:40 pm
    Apr 4, 2012 at 5:21 am
  • Hello, I have two different dataset, and wanted to join the two. For example I have a table of codes of cities, and other with with the codes of travels, [source for the destine]. what he wanted was ...
    MSousaMSousa
    Mar 26, 2012 at 9:41 am
    Mar 27, 2012 at 4:30 pm
  • hi I plot a series of observation data every minutes in a day as the attachment below plot(wnd,type='l',lty=1,col='red',lwd=1,xlab=xxlab,ylab=yylab,ylim=YY) In the figure, the x-axis tickment is the ...
    Jie TangJie Tang
    Mar 8, 2012 at 3:25 am
    Mar 18, 2012 at 10:34 am
  • Dear all, suppose I have a vector with elements as: Vec <- c(2,3,4,5,6) Now I want to have all possible combination of length 3 using those elements and without any repetition. Like, I want to have 1 ...
    Somnath DharSomnath Dhar
    Mar 28, 2012 at 7:17 pm
    Mar 29, 2012 at 1:55 pm
  • When using a gtkDrawingArea as a Cairo device I very often encounter the error: "figure margins too large" Even for the below "getting started" example from http://www.ggobi.org/rgtk2/ this is the ...
    Mark HeckmannMark Heckmann
    Mar 8, 2012 at 7:27 pm
    Mar 27, 2012 at 2:07 am
  • Hello I am developing a small program that to calculate the maximum, minimum and average. The data.frame v is POS DIF 4 - 4 56 4 - 3 61 3 - 3 300 3 - 3 27 3 - 3 33 3 - 3 87 3 - 4 49 4 - 4 71 4 - 3 ...
    RMSOPSRMSOPS
    Mar 13, 2012 at 9:45 am
    Mar 19, 2012 at 9:24 pm
  • After a long and winding road (sorry but I'm a novice) I get to a final result which is quite close to what I need; nevertheless I would like to tweak a little further the xyplot so that I can get ...
    MaxbreMaxbre
    Mar 28, 2012 at 10:21 am
    Apr 12, 2012 at 6:42 am
  • Hi all! I'm trying to save an output of the HEXBIN process... is so much data (105k), and I need to export to an ASCII file. I tried to use: write.table() ---- Error in as.data.frame.default(x[[i]], ...
    Fco.pchFco.pch
    Mar 22, 2012 at 4:31 pm
    Mar 23, 2012 at 5:32 pm
  • Hi all: I'm attempting to create a faceted plot with ggplot2 and I'm having issues with a factor's order that is used to define the facet_grid(). The factor (named total.density) has three levels - ...
    Justin MontemaranoJustin Montemarano
    Mar 21, 2012 at 2:26 pm
    Mar 21, 2012 at 5:22 pm
  • Hello, Does anyone know of a way I can speed this up? Basically I'm attempting to get the data item on the same row as the report date for each report date available. In reality, I have over 11k of ...
    Ben quantBen quant
    Mar 5, 2012 at 8:53 pm
    Mar 9, 2012 at 8:31 pm
  • Hi, I need to sample randomly my dataset for 1000 times. The sample need to be the 80%. I know how to do that, my problem is that not only I need the 80%, but I also need the corresponding 20% each ...
    OritteropusOritteropus
    Mar 7, 2012 at 4:41 pm
    Mar 8, 2012 at 2:00 pm
  • Dear list, Sorry, but I cannot get my head around how and I could pass arguments along to high-level functions. What I have is a function that would benefit from me using ddply from the plyr ...
    Fredrik KarlssonFredrik Karlsson
    Mar 3, 2012 at 10:46 pm
    Mar 6, 2012 at 2:59 pm
  • Hello R users I am searching for a descriptive summary of the use of POSIXlt as compared to POSIXct date/time formats. I have been using them extensively for different purposes, but still can't quite ...
    Steven R CorsiSteven R Corsi
    Mar 28, 2012 at 2:06 pm
    Mar 31, 2012 at 5:04 pm
  • Good Morning ??? I have a small question regarding the function subset. I am copying data from one table but I just want to collect data from a user. When do I take the view, presents the results I ...
    RMSOPSRMSOPS
    Mar 7, 2012 at 10:24 am
    Mar 30, 2012 at 8:24 am
  • Hi everybody, I have a data set with a value and a status (positive or negative case) and I want make a ROC Analysis. So, with ROCR Package, I have got the ROC curve (True Positive Fraction [tpf] ...
    Camille LeclercCamille Leclerc
    Mar 13, 2012 at 2:30 pm
    Mar 26, 2012 at 5:32 am
  • Hi all, Using the XML package, I'm not able to parse some html webpages. Here is my code and the error message: library("XML") url <- "http://www.huffingtonpost.com/social/GraniteSkyline?action=fans" ...
    Julien VelcinJulien Velcin
    Mar 22, 2012 at 4:20 pm
    Mar 23, 2012 at 5:51 pm
  • Dear all, I have made a function that given a number of list elements plot them to the same window. The first element is plotted by using plot and all the rest are plotted under the same window by ...
    AlaiosAlaios
    Mar 19, 2012 at 6:40 pm
    Mar 22, 2012 at 5:17 pm
  • Hi everyone. Based on a dependent variable (y), I'm trying to generate some independent variables with a specified correlation. For this there's no problems. However, I would like that have all my ...
    FilocheFiloche
    Mar 15, 2012 at 5:48 pm
    Mar 16, 2012 at 12:33 pm
  • I'm trying to copy the results of a dataframe to another within a cycle for but I am not able to implement the rbind, because give th d<-Null df<-NULL for(r in 2: nrow(x)) { val_user<-x.name[[r]] ...
    RMSOPSRMSOPS
    Mar 8, 2012 at 4:26 pm
    Mar 9, 2012 at 11:09 pm
  • Hi there, I wish to read a 9.6GB .DAT file into R (64-bit R on 64-bit Windows machine) - to then delete a substantial number of rows & then convert to a .csv file. Upon the first attempt the computer ...
    RHelpPleaseRHelpPlease
    Mar 8, 2012 at 6:19 pm
    Mar 9, 2012 at 2:28 pm
  • Hi, I would like to use the effect() function (actually a slightly modified version of it) on the output of the lmer() function in the lme4 package. But the effects package requires the nlme ...
    Michael KubovyMichael Kubovy
    Mar 8, 2012 at 1:53 am
    Mar 9, 2012 at 2:17 am
  • i run like ,but it giving other than what i expect i also want to capture output & print it [1] 127 ---------------------------------------------------------------------------- [1] 127 -- View this ...
    Sagarnikam123Sagarnikam123
    Mar 6, 2012 at 11:56 am
    Mar 8, 2012 at 9:29 am
  • Friends I have an xts that I wish to access. Browse[2] DATA.ba[[p]]["2012-03-20 00:59:57","bid"] bid 2012-03-20 00:59:57 1.4993 So far so good. Now putting the index into a variable: Browse[2] Time ...
    Worik RWorik R
    Mar 25, 2012 at 8:15 am
    Dec 10, 2012 at 7:06 pm
  • Hi, I d like to simulate 9 variables; 3 binary, 3 categorical and 3 continuous with a known covariance matrix. Using mvtnorm and later dichotimize/categorize variables is not efficient. Do you know ...
    Burak AydinBurak Aydin
    Mar 29, 2012 at 6:31 pm
    Apr 4, 2012 at 4:23 pm
  • Hi, I got a stack overflow error when training a glm model with a very long formula. Regards, Xiaobo Gu
    Xiaobo GuXiaobo Gu
    Mar 30, 2012 at 1:16 am
    Apr 2, 2012 at 4:53 pm
  • Hi. I need a bit of help. I'm running Windows 7 and "out of the box" versions of Rtools and R (version 2.14.2) and am trying to compile a package that worked before. When I run the command: i get a ...
    Stephen EickStephen Eick
    Mar 22, 2012 at 5:33 pm
    Mar 29, 2012 at 8:02 pm
  • Hello, I have a 32 GB RAM Mac Pro with a 2*2.4 GHz quad core processor and 2TB storage. Despite this having so much memory, I am not able to get R to utilize much more than 3 GBs. Some of my scripts ...
    Kurinji PandiyanKurinji Pandiyan
    Mar 22, 2012 at 9:22 pm
    Mar 27, 2012 at 4:40 pm
  • I have a box set up with Kubuntu as the OS.? I didn't perform the R install but was told the version of R available via the apt-get command was 2.13.1.? Is there any way to get 2.14.0 in that same ...
    Scott RaynaudScott Raynaud
    Mar 7, 2012 at 5:03 pm
    Mar 17, 2012 at 6:14 pm
  • hi everyone . Now I want to draw several lines in one frame.And it seems needs more colors except for blue red,black .Where can i found these color name or define some new color ?thank you . -- TANG ...
    Jie TangJie Tang
    Mar 14, 2012 at 2:55 pm
    Mar 17, 2012 at 12:00 pm
  • Hello, I have a vector {a, b1, b2, b3, b4}. How can I calculate the following matrix: var(a) cov(a, b1) cov(a, b2) cov(a, b3) cov(a, b4) cov(a, b1) var(b1) cov(a, b2) cov(a, b3) cov(a, b4) ... .. ...
    Huang jialinHuang jialin
    Mar 12, 2012 at 3:42 pm
    Mar 12, 2012 at 4:32 pm
  • Hello All, i've a set of observations that is in the form : a, b, c, d, e, f 67.12, 4.28, 1.7825, 30, 3, 16001 67.12, 4.28, 1.7825, 30, 3, 16001 66.57, 4.28, 1.355, 30, 3, 16001 66.2, 4.28, 1.3459, ...
    Massimo Di StefanoMassimo Di Stefano
    Mar 8, 2012 at 12:41 pm
    Mar 10, 2012 at 8:51 am
  • Good Afternoon, ?? I have a small problem with the following code. # The x.sub$Time[[1]] 2006-10-31 19:03:01 EST # when put in variable star give-me star<-x.sub$Time[[1]] print(star) ...
    RMSOPSRMSOPS
    Mar 7, 2012 at 3:15 pm
    Mar 8, 2012 at 4:33 pm
  • Dear List, I am struggling with the trellis graphic. A similar problem was mentioned here ...
    SluedtkeSluedtke
    Mar 2, 2012 at 10:15 pm
    Mar 7, 2012 at 8:50 am
  • Hi all, I'm having a strange error that prevents me from installing new packages, or updating packages after reinstalling. The error message is Warning: unable to move temporary installation ...
    Drew TyreDrew Tyre
    Mar 31, 2012 at 2:15 pm
    Apr 5, 2012 at 3:46 pm
  • Hi, I wrote a function with three inputs fun(x,y,z). x is a matrix of three vectors combined with cbind. e.g. x1<-(1,2,3,4) x2<-(2,3,4,5) x3<-(3,4,5,6) x<-cbind(x1,x2,x3) y is a vector e.g ...
    StellaStella
    Mar 22, 2012 at 3:43 pm
    Mar 29, 2012 at 1:04 pm
  • Hi All, Here is the case. I want to build classification model (SVM). Some of variables for this model are categorical attributes which represent words (usually 3-10 words - query for search in ...
    Alekseiy BeloshitskiyAlekseiy Beloshitskiy
    Mar 27, 2012 at 10:05 am
    Mar 28, 2012 at 1:56 pm
  • Dear Sir/Madam, I'm getting a problem with a R-code which converts a data frame to a matrix. It first generate a (m^(n-m) * m) matrix A and then regenerate another matrix B having less dimension than ...
    Ritwik_rRitwik_r
    Mar 23, 2012 at 6:53 am
    Mar 26, 2012 at 2:02 pm
  • I am using anova.lm to compare 3 linear models. Model 1 has 1 variable, model 2 has 2 variables and model 3 has 3 variables. All models are fitted to the same data set. anova.lm(model1,model2) gives ...
    MsteaneMsteane
    Mar 20, 2012 at 8:09 pm
    Mar 21, 2012 at 5:03 pm
  • Say I fit a logistic model and want to calculate an odds ratio between 2 sets of predictors. It is easy to obtain the difference in the predicted logodds using the predict() function, and thus get a ...
    Dominic ComtoisDominic Comtois
    Mar 19, 2012 at 2:32 am
    Mar 21, 2012 at 4:11 pm
  • Dear R-help Members, I am wondering if anyone think of the optimal way of computing for several numeric variable the difference between 2 levels of a factor. To be clear let's generate a simple data ...
    WphantomfrWphantomfr
    Mar 21, 2012 at 8:48 am
    Mar 21, 2012 at 2:16 pm
  • Hi, I would like suggestions as to how to perform rolling regressions with the window extended one period at a time. That is, an initial sample period is passed to estimation and that very sample is ...
    Pie'Pie'
    Mar 13, 2012 at 8:49 pm
    Mar 19, 2012 at 6:10 pm
  • Dear All, I have a seemingly very simple question, but I just cannot figure out the answer. I attempted to run the following:a=0.1*(1:9);which(a==0.3);it returns integer(0). But obviously, the third ...
    Dajiang LiuDajiang Liu
    Mar 18, 2012 at 9:43 pm
    Mar 19, 2012 at 3:30 pm
  • I am working on a simulation where I need to count the number of matches for an arbitrary pattern in a large sequence of binomial factors. My current code is for(indx in 1:(length(bin.05)-3)) if ...
    Walter AndersonWalter Anderson
    Mar 16, 2012 at 4:59 pm
    Mar 18, 2012 at 8:48 pm
  • Hello can anyone help please? i read two words "cell1", "cell2" into a list. I want to turn this list into a factor. [[1]] [1] "cell1" "cell2" Error in sort.list(y) : 'x' must be atomic for ...
    Sybil kennellySybil kennelly
    Mar 13, 2012 at 11:29 am
    Mar 15, 2012 at 12:27 am
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R. Michael Weylandt: 201 posts David Winsemius: 154 posts Sarah Goslee: 83 posts Berend Hasselman: 60 posts Jim Holtman: 56 posts Petr Savicky: 52 posts Uwe Ligges: 50 posts Petr PIKAL: 48 posts Duncan Murdoch: 43 posts Bert Gunter: 42 posts Peter dalgaard: 41 posts RMSOPS: 39 posts Alaios: 38 posts Gabor Grothendieck: 37 posts Rui Barradas: 34 posts Ilai: 32 posts Joshua Wiley: 32 posts Peter Ehlers: 32 posts Prof Brian Ripley: 31 posts Pascal Oettli: 29 posts
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