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Dear all, I am familiar with obtaining the value corresponding to a chosen probability via the quantile function. Now I am facing the opposite problem I have a value an want to know it's corresponding percentile in the distribution. So is there a function for this as well? Thank you for your support in advance, Felix

Hi everybody, as I am dealing with complex confusion matrices, I wonder whether there might be a way to colour text/tabular data in R. I.e. imagine highlighting the true positive values or certain classes in a table. I know how to colour text in graphical output as well as how to sweave or odfWeave coloured tables. But is there a way to do it directly in an interactive R session? Of course I

Dear R colleagues, consider my data.frame named "df" with 3 columns - being level, prevalence and sensitivity - and 7 rows of data (see dump below). df <- structure(list(level = structure(1:7, .Label = c("0", "1", "10", "100", "1010", "11", "110"), class = "factor"), prevalence = structure(c(4L, 2L, 3L,

Dear R colleagues, as result of a function a huge list is generated. From this result list I'd like to extract information. Think of the list i.e. as an object named "listResult" with the following form: [[a]] [1] [2] [3] [4] [5] [[b]] [1] [2] [3] [4] [5] [[c]] [1] [2] [3] [4] [5] where levels=c(a,b,c) I'd like to extract a data.frame like a [2] b [2] c [2] What I

Dear R colleagues, I face a seemingly simple problem I couldn't find a solution for myself so far: I have to sum the digits of numbers. Example: 1010 ->2 100100110 -> 4 Unfortunately there seems not to be a function for this task. So my idea was to use sum(x) for it. But I did not figure out how to slice a number to a vector of its digits. Example (continued from above): 1010 ->

Dear community, unfortunately I did not manage load the rJava package receiving the following error-message: > library("rJava") Error in inDL(x, as.logical(local), as.logical(now), ...) : kann shared library 'C:/Programme/R/2.8.1/library/rJava/libs/rJava.dll' nicht laden: LoadLibrary failure: Das angegebene Modul wurde nicht gefunden. Error : .onLoad in

Dear community, unfortunately I did not manage load the rJava package receiving the following error-message: > library("rJava") Error in inDL(x, as.logical(local), as.logical(now), ...) : kann shared library 'C:/Programme/R/2.8.1/library/rJava/libs/rJava.dll' nicht laden: LoadLibrary failure: Das angegebene Modul wurde nicht gefunden. Error : .onLoad in

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 a thread regarding plotting arbitrary confidence boundaries from Pascal H?nggi http://www.mail-archive.com/r-help at r-project.org/msg24013.html which cites the even older thread

Dear R-colleagues, this is a question from a R-newbie medical doctor: I am evaluating data on inter-observer-reliability in endoscopy. 20 medical doctors judged 42 videos filling out a multiple choice survey for each video. The overall-data is organized in a classical way: observations (items from the multiple choice survey) as columns, each case (identified by the two columns "number of

Dear R-colleagues, another question from a newbie: I am creating a lot of simple pivot-charts from my raw data using the reshape-package. In these charts we have medical doctors judging videos in the columns and the videos they judge in the rows. Simple example of chart/data.frame "input" with two categories 1/0: video 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 1 1 0 0

Dear R-colleagues, I am quite a newbie to R fighting my stupidity to solve a probably quite simple problem of generating artificial data with defined features. I am conducting a study of inter-observer-agreement in child-bronchoscopy. One of the most important measures is Kappa according to Fleiss, which is very comfortable available in R through the irr-package. Unfortunately medical doctors

Dear R colleagues, as a result of my calculations regarding the inter-observer-variability in bronchoscopy, I get a confusion matrix like the following: 0 1 1001 1010 11 0 609 11 54 36 6 1 1 2 6 0 2 10 14 0 0 8 4 100 4 0 0 0 0 1000 23 7 12 10 5 1001 0 0 4 0 0 1010 4 0 0 3 0 1011 1 0 1 0 2 11

Dear R colleagues, I annotated a list of single nuclotide polymorphiosms (SNP) with the corresponding genes using biomaRt. The result is the following data.frame (pasted from R): snp ensembl_gene_id 1 rs8032583 2 rs1071600 ENSG00000101605 3 rs13406898 ENSG00000167165 4 rs7030479

Dear colleagues, I have really heavy problems in sorting the results of a table according to certain features of the levels in the table. Prerequisites: It all starts with a fairly simple data set, which stores observations of 21 observers (horizontally from 1 to 21; 21 is reference/goldstandard) who diagnosed 42 videos (vertically from 1 to 42). See dump of R-object "input" below in

Dear R colleagues, for a statistics tutorial I want to develop a nice 3d-graphic of the well known target comparison/analogy of accuracy and precision (see i.e. http://en.wikipedia.org/wiki/Accuracy_and_precision for a simple hand made 2d graphic). The code for a really beautiful graphic is already provided as demo(bivar) in the rgl package (for a picture see i.e