similar to: ROC curve in R

Hi I'm new to stats and R, so can you please help me or guide me building ROC curve in an elaborate way with codes I loaded ROCR package, but I'm not sure how to use it. Requirement To build ROC curve using only PSA(variable) alone of the original cohort against the ROC of the Model of the original cohort. It would be really great if you could help me with this. Thanks

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Hello, I want to know if there are some functions or packages to solve differential and integral equation using R. Thanks. Shao chunxuan. [[alternative HTML version deleted]]

Hi, I have a simple beginner's question on removing a list of objects. Say I have objects C243.Daily1, C243.Daily2...C243.Daily5 in my workspace. I'd like to remove these without using rm five times. So I write. > a <- list(paste("C243.Daily",sep="",1:5)) > rm(a) Obviously this wouldn't work, as it would only remove the object a. But is there any way

Good Morning i am in doctorate. i want to ask for the packages of R, i tried to install it, but it appears " not found". each time i have to delete and install again the programme R. Are there another method for installing the package? thank you

Hello R Users, How to make a variable equidistance with time i.e. how to interpolate a variable if it is not sampled at equal time interval. Many thanks, Regards, Yogesh [[alternative HTML version deleted]]

Hi, Apologies for the long mail. I have a data.frame with columns of price/mcap data for a portfolio of stocks, and the date. To get the total value of the portfolio on a daily basis, I calculate rowSums of the data.frame. > set.seed(1) > ab <- matrix(round(runif(100)*100),nrow=20,ncol=5) > ab[1:5,4:5] <- NA > ab[6:10,5] <- NA > ac <- as.data.frame(ifelse(ab <=

Hi All what is the command to give me the listing of the loaded packages. I mean which are active and not the listing of all the installed packages as given by library() thanks in advance -gaurav ============================================================================================ DISCLAIMER AND CONFIDENTIALITY CAUTION:\ \ This message and ...{{dropped}}

Hello R Community, I am really impressed by the 'R'. I am a computer engineer. Further, I have done work on Linux Code at my home and Worked on Cisco IOS platform. I would like to contribute to the software i.e. i would like to devote my free time for its development, but i do not know how to join the development team. If anybody can tell me the way then please show me the way. I

Hi All Does R supports Vista Business and Vista Home Premium. I am planning to upgrade my system. Before that I just wanted to confirm whether R will work on Vista or not. Thanks for this help in advance -gaurav Sayonara With Smile & With Warm Regards :-) G a u r a v Y a d a v Assistant Manager, Economic Research & Surveillance Department, Clearing Corporation Of

Hello R experts What does this error means and how to resolve this issue (cannot change value of locked binding for ). Please suggest > mc = MonteCarloOption(dt = 1/360, pathLength = 30, mcSteps = 5000, mcLoops = + 50, init = TRUE, innovations.gen = sobolInnovations, path.gen = wienerPath, + payoff.calc = arithmeticAsianPayoff, antithetic = TRUE, standardization = + FALSE, trace = TRUE,

hi all, I have a simple question that does power spectral analysis related to capacity dimension, information dimension, lyapunov exponent, hurst exponent. If yes then please show me the way. I am newbie in the world of chaos. Sayonara With Smile & With Warm Regards :-) G a u r a v Y a d a v Senior Executive Officer, Economic Research & Surveillance Department, Clearing

Hi All, Thanks for all your discussions which I read offline and enhance my knowledge. I just want to know how to make yield curve by bootstrapping using R. Please give me some subject-matter links and code links. Especially the Spot Yield Curve and YTM Curve. Sayonara With Smile & With Warm Regards :-) G a u r a v Y a d a v Senior Executive Officer, Economic Research &

Hi all a very happy greeting to you all. i have just joined the list, i am newbie in R and this is my first message ( before this i was a member of Linux kernel mailing list) and hence i woulk like to add that i know how to behave in the mailing lists. I have a data something like this which i am reading from a csv file using read.table (Is there any difference between read.csv and read.table

Hi All R Experts, Please help me. Query is given at the end of this R Session +++++++++start of R Session+++++++ > SCORES<-read.csv("C:/SCORE.csv",header=TRUE,sep=",") > SCORES SrNo Player Score 1 1 A 12 2 2 B 23 3 3 C 34 4 4 A 54 +++++++++++++++++ 17 17 A 433 18 18 B 32 19 19 B 34 20

Hello All I have time series data like given hereinbelow :- The data is having dates. I tried using ts() but it requires frequency. As i have holidays, saturdays sunday market closed, and also sometimes the data may not be recorded. I want to create a time series object but i want that where ever the holiday is the except saturday/sunday then it should impute the mean of previous and the next

In the package lasso2, there is a Prostate Data. To find coefficients in the prostate cancer example we could impose L1 constraint on the parameters. code is: data(Prostate) p.mean <- apply(Prostate, 5,mean) pros <- sweep(Prostate, 5, p.mean, "-") p.std <- apply(pros, 5, var) pros <- sweep(pros, 5, sqrt(p.std),"/") pros[, "lpsa"] <-

All, For my understanding, I wanted to see if I can get glmnet predictions using both the predict function and also by multiplying coefficients by the variable matrix. This is not worked out. Could anyone suggest where I am going wrong? I understand that I may not have the mean/intercept correct, but the scaling is also off, which suggests a bigger mistake. Thanks for your help. Juliet Hannah

Describe fails for me with a message similar to what was an issue in 2008 and got fixed according to posts. R version 2.15.0 (2012-03-30) Copyright (C) 2012 The R Foundation for Statistical Computing ISBN 3-900051-07-0 Platform: i386-pc-mingw32/i386 (32-bit) # output truncated > options(chmhelp = FALSE, help_type = "text") > .help.ESS <- help >

Hi Everyone, I have a question regarding the construction of 3D graphs in 'R', BUT these graphs also need to illustrate movement (with time) of the prostate gland (using radiological techniques). I am not sure how to do this in 'R' although I'm sure there is some way of doing it. Below, I have copied and pasted some of the data with which I'm working on. The data