search for: rabak

Hi, I am wondering if anyone can suggest how to test the equality of 2 proportions. The caveat here is that the 2 proportions were calculated from the same number of samples using 2 different tests. So essentially we are comparing 2 accuracy rates from same, say 100, samples. I think this is like a paired test, but don't know if really we need to consider the "paired" nature of the

Hello I am new to RExcel and I would like to run a source code form the excel worksheet. I would like to run the following code source("C:\\Quantil Aplicativos\\Genercauca\\BackwardSelectionNC.r") from the excel wroksheet. Does anybody know how to do this? Thank you Felipe Parra [[alternative HTML version deleted]]

Hi, I am trying to read the "credit.lisp" file of the Japanese credit database in UCI repository, but it is in lisp format which I do not know how to read. I have not found how to do that in the foreign library http://archive.ics.uci.edu/ml/datasets/Japanese+Credit+Screening <http://archive.ics.uci.edu/ml/datasets/Japanese+Credit+Screening> Could anyone help me? Best

Dear Gustaf, I wish you a happy new year! I am a PhD Staff at LSHTM and I have been trying to use WHO anthro macros in R with the file you posted on internet but when I double check the WHZ, HAZ, WAZ output with output from ENA or STATA, it differs slightly. Do you have any idea why that might be the case? Many thanks Severine

Hi, I haven't found in R a possibility to draw a boxplot with a diamond shape (means and CI). Does anyone know how to plot it ? thanks,

...ial" although the font when ploting or using text() for annotation in graphics employs the font selected in the Rdevga file (Verdana in this case). ? I searched all documentation and the Net and the answer to this puzzle eluded me, so if not a bug, I find this very unexpected! ? TIA ? -- Cesar Rabak

Hallo everyone, I want to evaluate the change of the distribution for several size classes. How can i order these separate histograms with the same y-axis along a common x-axis according to their size classes. It would like it to look a bit like this (http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=109) without the quantile regression. I can produce the separate histograms, but have

Hi, I'm trying to run on Windows 7 a scriptfile with Rscript.exe from within Excel 2010 with the following code: Call Shell(rPath & "\Rscript.exe C:\Work\Latest\_Test.R", vbHide) The good news is: the above code works perfectly, but ... If I add white spaces to my map directory, like: Call Shell(rPath & "\Rscript.exe C:\Work\Latest 1\_Test.R", vbHide) In the

Dear list, This must be an easy one. I have a data frame like this one: test.df <- data.frame(x1=c(2,3,5), x2=c(5, 3, 4), w=c(0.8, 0.3, 0.5)) and I want to construct a weighted mean of the first two columns using the third column for weighting; i.e. y[1] = x1[1]*w[1] + x2[1]*(1-w[1]) y[2] = ... One way to do this is to use a loop like test.df$y <-numeric(3) with(test.df, for(i in

I was glad to see the new rpart.plot package by Stephen Milborrow. I was however a bit concerned that Stephen distributed a dataset I created, and renamed the dataset (from titanic3 to ptitanic) in the process [with some justification, as some variables were omitted]. Fortunately Stephen included the script he used to download the dataset from our web site, and gave full credit to us. What

hey all, I'm just getting used to R and i'm having issues when it comes to reading my data in rows rather than columns. any good advice would be much appreciated ! here is the error: > data1 <- read.table(file.choose(),header=T) > x1 <- c(data1[1,1:5]) > shapiro.test(x1) Error in sort.int(x, na.last = na.last, decreasing = decreasing, ...) : 'x' must be atomic

Dear R users, I am trying to use xyplot to draw group mean and CI. The following is the sample code. But I want: 1. Use different colors and symbols to draw individual points, CI and the lines connect group means from different time points; 2. Add jitters to x axis to allow CIs not be overlapped Could anyone modify the attached code to achieve this? Thanks library(lattice)

Dear All I am reposting because I my problem is real issue and I have been working on this. I know this might be simple to those who know it ! Anyway I need help ! Let me clear my point. I have huge number of datapoints plotted using either base plot function or xyplot in lattice (I have preference to use lattice). name xvar p 1 M1 1 0.107983837 2 M2 11

Hello everybody I want to compare the proportions of germinated seeds (seed batches of size 10) of three plant types (1,2,3) with a glm with binomial data (following the method in Crawley: Statistics,an introduction using R, p.247). The problem seems to be that in two plant types (2,3) all plants have proportions = 0. I give you my data and the model I'm running: success failure

...Duncan Murdoch) 48. Re: How to produce a graph of glms in R? (Greg Snow) 49. Re: Plotting a cloud/fog of variable density in rgl (Mike Marchywka) 50. Re: data acquisition with R? (B.-Markus Schuller) 51. Is it possible to make a matrix to start at row 0? (bogdanno) 52. Re: Rexcel (csrabak) 53. Re: question about constraint minimization (dhacademic at gmail.com) 54. Re: Lost in POSIX (Dimitri Shvorob) 55. Re: Find in R and R books (Georg Otto) 56. Re: using rpart with a tree misclassification condition (meytar) 57. Re: memory profiling (Patrick Leyshock) 58. Some question...