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Forum: R

R programming and usage, R news, R tips and tutorials

  1. Sticky Thread Sticky: Today I Learned: ____

    I thought it might be nice to just have a place to post some happy little things you learned or (re)discovered about R that makes your life nicer and...

    Started by Dason‎, 01-03-2012 10:39 AM
    24 Pages
    1 2 3 ... 24
    • Replies: 345
    • Views: 46,302
    04-08-2015, 07:15 AM Go to last post
  2. Sticky Thread Sticky: [R Graphics] Beautiful graphics thread

    Hi Everyone, I thought I might start a thread which showcases the graphics abilities of R. I'll start it off with one I just made. This thread...

    Started by TheEcologist‎, 10-17-2012 05:08 AM
    6 Pages
    1 2 3 ... 6
    • Replies: 76
    • Views: 21,221
    02-04-2015, 09:37 PM Go to last post
  3. Sticky Thread Sticky: R News and Updates

    I'm starting this thread out of frustration for my own oversight. blog.revolutionanalytics.com was having an R webinar today (LINK) that looked...

    Started by trinker‎, 08-24-2011 09:41 AM
    8 Pages
    1 2 3 ... 8
    • Replies: 107
    • Views: 22,104
    11-22-2014, 08:28 AM Go to last post
  4. Sticky Thread Sticky: Share your functions & code

    I’m starting this thread as a sharing thread. The power of is in building and sharing on one another’s creativity. I’m often amazed at how people...

    Started by trinker‎, 06-25-2011 03:42 PM
    19 Pages
    1 2 3 ... 19
    • Replies: 273
    • Views: 49,487
    10-20-2014, 10:21 AM Go to last post
  5. Sticky Thread Sticky: Info for R users (Links, Manuals, Books, etc.)

    Note: This original post has been modified to make it easier to find the resources in the thread and to compile them into one location. If you want...

    Started by Tart‎, 08-06-2008 09:22 AM
    7 Pages
    1 2 3 ... 7
    • Replies: 99
    • Views: 37,937
    05-22-2014, 02:07 AM Go to last post
  6. Sticky Thread Sticky: How to use Code tags

    Using Code Tags This thread contains a brief introduction to using code tags and presenting code in general on this forum. I'm biased toward R so...

    Started by Dason‎, 10-17-2012 07:20 PM
    • Replies: 0
    • Views: 7,088
    10-17-2012, 07:20 PM Go to last post
  1. calculating goodness of fit and choosing the right model without plotting

    I'm trying to evaluate the value of an object, depending on his characteristics. In order to do this, I'm building the following regression model...

    Started by paul15071992‎, 04-30-2015 02:40 AM
    goodness-of-fit, regression
    • Replies: 2
    • Views: 136
    Today, 07:31 AM Go to last post
  2. Error message in R Studio.. help!!! anyone

    Error in csDensity(genes(cuff_data)) : error in evaluating the argument 'object' in selecting a method for function 'csDensity': Error in...

    Started by mfahim‎, 05-02-2015 05:59 AM
    error, rstudio
    • Replies: 1
    • Views: 101
    05-02-2015, 09:49 AM Go to last post
  3. Constrained Optimization (constrOptim)

    I have a constrained optimization problem and I can't figure out why my R code doesn't seem to work. My objective function which I'm trying to...

    Started by chaps‎, 04-26-2015 12:18 PM
    • Replies: 2
    • Views: 139
    05-02-2015, 08:15 AM Go to last post
  4. Multiple Polynomial Regression in R

    Hi all, I need to do predict the values of some variables from a set of predictors. The variables I need to predict are called Y1 and Y2 belonging...

    Started by paolo19.91‎, 05-01-2015 09:45 AM
    machine learning, polynomial, regression
    • Replies: 0
    • Views: 50
    05-01-2015, 09:45 AM Go to last post
  5. VECM interpretation - Johansen-Procedure

    X1 , X2 , X3 and X4 are time series which are stationary at level.I want to establish long term relation between them.I am planning to use it as...

    Started by TheMonkster‎, 04-30-2015 06:24 AM
    forecast, johansen test, time series analysis, vecm
    • Replies: 0
    • Views: 65
    04-30-2015, 06:24 AM Go to last post
  6. [R] profiling behaves differently in a batch process

    Can anybody reproduce this, and if so, why does this happen? Lets make a program to profile # create function to profile foo <-...

    Started by TheEcologist‎, 04-27-2015 11:48 AM
    • Replies: 5
    • Views: 172
    04-28-2015, 08:51 AM Go to last post
  7. R MarkDown Presentation Link on Picture

    Hello, i'm trying to embedded a link in a picture/image with R Markdown Presentation. Someone know how can i achieve this ? Thanks for your...

    Started by tsenegas‎, 04-27-2015 01:04 PM
    • Replies: 0
    • Views: 87
    04-27-2015, 01:04 PM Go to last post
  8. how to get adjusted prevalence after svyglm in R?

    Hi, suppose Y is a dichotomous outcome (1/0) from a survey data. I run a logistic regression on a few categorical variables like a,b,c,.. ...

    Started by kramer11‎, 04-26-2015 02:19 PM
    adjusted prevalence, survey analysis
    • Replies: 0
    • Views: 130
    04-26-2015, 02:19 PM Go to last post
  9. Interpreting ADF Test result

    I have imported csv into R.CSV has 530 rows and one column.I tested it with 3 stationary tests and I got 3 different results. 1) >...

    Started by TheMonkster‎, 04-26-2015 01:29 AM
    augmented dickey fuller, cointegration, philip-perron, stationarity, time series
    • Replies: 0
    • Views: 118
    04-26-2015, 01:29 AM Go to last post
  10. rollapply with Arima model: testing for stability of coefficients

    Hi everyone, I am trying to fit an arima model on a rolling window using rollapply.My aim is to plot a graph of the evolution of the coefficient,...

    Started by nour88‎, 04-18-2015 10:18 AM
    arima, econometrics, r programming, stationarity, time series analysis
    • Replies: 5
    • Views: 269
    04-25-2015, 11:03 AM Go to last post
  11. regex with math

    Ok So I have a set of strings as follows: myStrings <- c("GENERAL79","GENERAL81","GENERAL82", "GENERAL83","GENERAL86","GENERAL89","GENERAL91",...

    Started by Lazar‎, 04-24-2015 12:12 AM
    • Replies: 11
    • Views: 271
    04-25-2015, 12:02 AM Go to last post
  12. Memory error

    Hello all! I am importing data from .xlsx file about 8 million data points into R for statistical research. I was using XLConnect package. ...

    Started by mitulsj‎, 04-24-2015 03:12 AM
    • Replies: 0
    • Views: 118
    04-24-2015, 03:12 AM Go to last post
  13. orthogonal polynomials

    Can someone help me in how to change my code so I don't have raw polynomials but orthogonal ones? I can't seem to figure it out. test2 =...

    Started by Artreides‎, 04-23-2015 06:07 AM
    • Replies: 2
    • Views: 136
    04-23-2015, 04:05 PM Go to last post
  14. different k's

    I have to make an additive model, and using different k's when selecting the best order k = 3,4,5 How do I program this in R?

    Started by Artreides‎, 04-23-2015 04:03 PM
    • Replies: 0
    • Views: 104
    04-23-2015, 04:03 PM Go to last post
  15. additive model

    I want to compare data with and without interaction between x1 and x2. What is the code I need to use for this model with response variable Y? I'm...

    Started by Artreides‎, 04-21-2015 10:13 AM
    • Replies: 13
    • Views: 275
    04-23-2015, 08:06 AM Go to last post
  16. Adding data tables

    For a project I have several data.tables, each about one operation that must be performed in the production process of a product. Each product has to...

    Started by WCTStats‎, 04-23-2015 07:00 AM
    • Replies: 1
    • Views: 112
    04-23-2015, 07:57 AM Go to last post
  17. Obtaining superscripts to affix to means that are not significantly different

    Hello all, It is often time consuming to interpret p-values of multiple pairwise comparisons of groups and assign them a letter code for...

    Started by JoachimPCS‎, 04-23-2015 06:06 AM
    • Replies: 0
    • Views: 74
    04-23-2015, 06:06 AM Go to last post
  18. dunn.test gives strange output

    Dear all, I have a question concerning my output of the dunn.test function in R. I like to compare different datasets, which are not distributed...

    Started by JoachimPCS‎, 04-22-2015 06:18 AM
    • Replies: 3
    • Views: 161
    04-22-2015, 06:26 PM Go to last post
  19. Multiplication problem

    Hi there guys, I was wondering, I have a dataset with a structure like this: Product Number:____Batch size:_____Order Number:...

    Started by WCTStats‎, 04-22-2015 11:55 AM
    • Replies: 2
    • Views: 139
    04-22-2015, 01:00 PM Go to last post
  20. Need advice

    Hi Everyone, I am a new R user. I work at an agency where we sell travel packages and companion products/services. I have been tasked with using...

    Started by tanjar‎, 04-21-2015 12:05 PM
    • Replies: 5
    • Views: 207
    04-21-2015, 04:17 PM Go to last post
  21. Learn R

    Where can I find a good resource to learn R? Something structured and straightforward

    Started by xepre81‎, 04-20-2015 11:11 AM
    • Replies: 2
    • Views: 201
    04-20-2015, 11:29 AM Go to last post
  22. Help for drawing linear trend with lm or abline.

    Hi, I am a complete newbee in R, and I have a problem with linear trend fitting. My data is daily financial data for around 4 years. The...

    Started by cercig‎, 04-19-2015 05:03 PM
    abline, error, formula, linear trend
    • Replies: 2
    • Views: 176
    04-20-2015, 05:02 AM Go to last post
  23. Unhappy Matchit error message

    For learning how to use matchit(), I've created a notional dataset of treatment (0 or 1) and several covariates. Thus, there is no missing data. ...

    Started by apzelic‎, 04-18-2015 03:27 PM
    • Replies: 1
    • Views: 195
    04-18-2015, 04:53 PM Go to last post
  24. melt function chooses wrong id variable with large datasets in R

    Hello all, I'm using a large dataset consisting of 2 groups of data, 2 columns in excel with a header (group name) and 15 000 rows of data. I...

    Started by JoachimPCS‎, 04-16-2015 04:36 AM
    melt, reshape 2
    • Replies: 3
    • Views: 236
    04-17-2015, 03:41 AM Go to last post
  25. Nested design (I think)

    Hi Everyone, I am trying to analyse the following data: I have 10 different pencils, and I have measured three diameters (not the same...

    Started by La82‎, 04-16-2015 01:31 PM
    • Replies: 1
    • Views: 158
    04-16-2015, 02:48 PM Go to last post
  26. I do not get the answers that i seek doing an anova in R on my data

    Dear Talkstats I have made a dataset where i have treated the same cells with two different drugs. I have stimulated them with different...

    Started by Pra28‎, 04-14-2015 02:39 AM
    anova, incomplete, r-programming
    • Replies: 1
    • Views: 182
    04-15-2015, 02:19 AM Go to last post
  27. automatically compairing means in R

    Hello all, I am writing a script for statistical comparison of means. I'm doing many field trials with plants, where we have to compare the...

    Started by JoachimPCS‎, 04-14-2015 03:33 AM
    • Replies: 3
    • Views: 221
    04-14-2015, 09:01 AM Go to last post
  28. ROC for repeated measurements on the same statistical units

    I would like to ask for help with determining Receiver operating characteristic (ROC) curve for numeric predictor for longitudinal data with repeated...

    Started by ondrej.hradsky‎, 04-08-2015 05:49 AM
    roc; mixed model;
    • Replies: 6
    • Views: 356
    04-10-2015, 09:26 AM Go to last post
  29. Elegant way to do the inverse of aggregation

    hi, I have a data frame with several factor variables and one numeric variable that gives the number of times a row with the given combination of...

    Started by rogojel‎, 04-08-2015 01:40 PM
    aggregate, reshape
    • Replies: 2
    • Views: 227
    04-10-2015, 04:44 AM Go to last post
  30. Problem with a Correspondence analysis

    Hi everyone, I am a graduate student and I am currently working on a Food Sensory analysis. I want to run a Correspondence analysis in order...

    Started by Tochann‎, 04-09-2015 03:45 AM
    • Replies: 1
    • Views: 199
    04-09-2015, 10:18 AM Go to last post
  31. Red face how to combine multiple csv files in R using a common column in all the files?

    Hello Hello Everyone, please help me to write a code in combining multiple csv files in R using a common column in all the files( but diff no.of...

    Started by eswari‎, 02-21-2015 06:10 AM
    • Replies: 7
    • Views: 539
    04-08-2015, 05:40 PM Go to last post
  32. Can R do this...

    SPSS, which wants us to renew a contract, lists this as an advantage of doing so. My guess is there is a R package to do this (of course I don't...

    Started by noetsi‎, 04-06-2015 04:33 PM
    • Replies: 4
    • Views: 301
    04-08-2015, 03:13 PM Go to last post
  33. Talking Need to compare three data files and generate a report for the missing/not matching

    I have a reference Main Data files with these Column (Product ID ,Product Name ,Shipment date ,comments) .I need to compare this keeping primary Key...

    Started by netdbaind‎, 04-08-2015 01:55 PM
    • Replies: 0
    • Views: 136
    04-08-2015, 01:55 PM Go to last post
  34. dplyr: removing NAs from group_by variable

    I'm using the group_by function in dplyr, however, in the variable that I'm grouping by, there are NAs, which group_by is making into a seperate...

    Started by APOCooter‎, 04-07-2015 03:47 PM
    • Replies: 2
    • Views: 217
    04-07-2015, 04:15 PM Go to last post
  35. Mixed model mancova in R in comparison with SPSS and statistica

    Dear all, I'm trying to perform mixed design manova in R with one between subject variable and one within subject variable. First of all, my...

    Started by nickx‎, 04-05-2015 03:46 PM
    • Replies: 1
    • Views: 206
    04-07-2015, 07:29 AM Go to last post
  36. Simulate data

    Hello, I'm facing the following task: Simulate 500 values of the statistic (n-1)s^2/sigma^2 based on taking 500 samples of size n=40 from the...

    Started by Osiris10101‎, 04-06-2015 02:45 PM
    • Replies: 1
    • Views: 198
    04-06-2015, 02:57 PM Go to last post
  37. How to use Anova from package car right

    I have a problem using different ways of ANOVA using R. I read a lot of tutorials how do ANOVA and I also want to do the Huynh-Feldt correction in...

    Started by Flowerpower‎, 03-12-2015 07:07 AM
    anova, anova table, huynh-feldt correction, maulchy test, rcran
    • Replies: 1
    • Views: 253
    04-06-2015, 02:00 AM Go to last post
  38. Monte-Carlo integration

    Calculate \int_1^2 cx^2e^xdx where c is constant f(x)=ce^x, x\in \phi(x)=x^2 i)Using Monte-Carlo integration ii) Using antagonistic...

    Started by askazy‎, 04-04-2015 02:32 PM
    • Replies: 0
    • Views: 187
    04-04-2015, 02:32 PM Go to last post
  39. PUZZLE fractal

    who is the first that can write a code to develop a chart with a fractal?:D:D:D:D:D:confused::confused::confused::confused::confused:

    Started by tyu90‎, 04-04-2015 08:12 AM
    • Replies: 0
    • Views: 174
    04-04-2015, 08:12 AM Go to last post
  40. How to obtain density values of the heat map of kernel density distribution ?

    Hi all, So that looks tricky to me since I'm not specialized in statistics and softwares, but I'm hopeful that someone will give me an answer. ...

    Started by koronfelina‎, 04-01-2015 09:08 PM
    • Replies: 7
    • Views: 351
    04-03-2015, 07:29 PM Go to last post
  41. Which programs to download

    For those who are likely to say "this is crazy" 1) you're right and 2) you never worked in a state agency. Basically my agency got approval to...

    Started by noetsi‎, 03-19-2015 03:52 PM
    5 Pages
    1 2 3 ... 5
    installing r packages
    • Replies: 68
    • Views: 1,648
    04-03-2015, 04:52 PM Go to last post
  42. negative R in output of randomForest package

    Hi everyone, I am currently writing my master thesis about random forests and just started to work with the R software. When I am running my model...

    Started by alexa_cgn‎, 04-03-2015 09:11 AM
    negative r squared, r software, random forests, regression forests
    • Replies: 6
    • Views: 274
    04-03-2015, 12:46 PM Go to last post
  43. Numerical Integration

    Hey I'm trying to learn techniques of numerical integration and would like to hear from anybody else if they know of any litterature - preferable...

    Started by JesperHP‎, 04-01-2015 10:17 AM
    • Replies: 5
    • Views: 283
    04-03-2015, 09:50 AM Go to last post
  44. Proportions and CIs based on different factor levels

    I'm wondering if there's a package/function that can give me the proportion and confidence intervals of different factor levels. I have data that...

    Started by APOCooter‎, 04-01-2015 05:25 PM
    • Replies: 3
    • Views: 187
    04-02-2015, 04:26 PM Go to last post
  45. generate main panel with action button [R-Shiny]

    Hi, I'm not an expert in programing, but I try to build an application with Shiny. You could find the entire code below for a better understanding...

    Started by Cyrille‎, 03-26-2015 05:27 AM
    • Replies: 1
    • Views: 257
    04-01-2015, 06:16 AM Go to last post
  46. venn diagrams and par

    Hi. I am using the VennDiagram package to draw some venn diagrams. However, i want to draw multiple diagrams in the same plot, using par(mfrow ...)...

    Started by merik‎, 02-20-2015 11:27 AM
    • Replies: 2
    • Views: 267
    03-31-2015, 08:35 PM Go to last post
  47. Conditional Logistic Regression - help with interpreting results

    Hello there, I have performed a conditional logistic regression in R using the survival package, but I am not certain how to interpret my results...

    Started by Neofelis‎, 03-28-2015 02:40 PM
    • Replies: 10
    • Views: 418
    03-30-2015, 09:51 AM Go to last post
  48. Back testing trades in R

    Hi, Id like to do the following in R: I assume to have a series of tick data, say of EURUSD Spot. To keep things simple, I would like to know the...

    Started by randommess‎, 03-30-2015 09:07 AM
    • Replies: 0
    • Views: 134
    03-30-2015, 09:07 AM Go to last post
  49. multivariate garch project

    hello everyone! i'm developing a DCC-GARCH this i the specification of the univariate GARCH that than i'll put in the DCC specification. ...

    Started by tyu90‎, 03-30-2015 07:40 AM
    • Replies: 0
    • Views: 114
    03-30-2015, 07:40 AM Go to last post
  50. makefile knitr

    Ok so I want to make a makefile that will find all .Rmd files and convert them to html files. I have a make file the works but I want to work loop...

    Started by Lazar‎, 02-18-2015 08:07 PM
    html, knitr, make
    • Replies: 4
    • Views: 292
    03-30-2015, 07:36 AM Go to last post
  51. [R] environment aware scripting

    I like to create general purpose robust scripts, ones that work regardless (which is also why I aim to use as little packages as possible - having...

    Started by TheEcologist‎, 02-23-2015 09:47 AM
    • Replies: 8
    • Views: 479
    03-30-2015, 07:21 AM Go to last post
  52. Estimating fixed vs. random effects with lme (Hausman?)

    I have ran two lme mixed effects models in R, both using the same fixed effects variables but each with a different random effect variable. My...

    Started by samuelle‎, 03-30-2015 05:52 AM
    fixed effects, hausman, lme, random effects
    • Replies: 0
    • Views: 157
    03-30-2015, 05:52 AM Go to last post
  53. Using the Multiple Linear Regression Model to predict values.

    I've used R to create two linear regression models - one level-level and one log-level, from 125 lines of data given to me. I've been told: For...

    Started by elt48‎, 03-27-2015 12:01 PM
    fitted model, linear regression, prediction, rmspe
    • Replies: 5
    • Views: 363
    03-30-2015, 05:10 AM Go to last post
  54. DCC-garch forecast and for loop

    Hello everyone! i'm trying to write a for loop with a DCC-garch forecasting. i'm using rmgarch package. how can i develop a for loop on...

    Started by tyu90‎, 03-29-2015 03:34 AM
    • Replies: 1
    • Views: 158
    03-29-2015, 05:51 PM Go to last post
  55. Accept-Reject Method

    I want to generate a random variable X~exponential(1/2) by accept-reject method. f(x)=\frac{1}{2}e^{\frac{-1}{2}x} x\geq0. So I chose...

    Started by askazy‎, 03-28-2015 05:11 PM
    • Replies: 8
    • Views: 340
    03-28-2015, 06:42 PM Go to last post
  56. CCC and DCC MV-GARCH with R

    Hello, i'm new on R, i'm trying to develop a multivariate GARCH (CCC-GARCH or DCC-GARCH) with Banks's stocks return, Short and long term interest...

    Started by tyu90‎, 03-23-2015 05:08 AM
    • Replies: 2
    • Views: 304
    03-25-2015, 05:56 AM Go to last post
  57. Problem with nlme() convergence in a Monte Carlo simulation

    Hello. As part of a Monte Carlo simulation, I'm programming some model comparisons on generated data. The underlying relationship in the data is...

    Started by CapacitorFluxing‎, 03-16-2015 10:41 PM
    • Replies: 6
    • Views: 429
    03-18-2015, 05:05 AM Go to last post
  58. POSIXct objects in R

    So I have some arrival (and departure) data I wish to look at over the course of a month. I thought it would be best to convert the data to a date...

    Started by Prometheus‎, 03-17-2015 07:57 AM
    • Replies: 0
    • Views: 195
    03-17-2015, 07:57 AM Go to last post
  59. Post Request for feedback on some simple functions

    I'm currently taking the R Programming course as part of the Data Science certificate with Johns Hopkins through Coursera, and I wanted to get some...

    Started by cbtalkstats‎, 03-13-2015 06:29 PM
    • Replies: 8
    • Views: 400
    03-16-2015, 05:14 PM Go to last post
  60. arima() : Not possible to skip an AR Term ???!!!

    Hello. In the following example, you can see, that it is obviosly unfavourable to take the AR(2) and AR(3) term into the model, as the...

    Started by consuli‎, 03-16-2015 11:08 AM
    • Replies: 4
    • Views: 222
    03-16-2015, 02:41 PM Go to last post

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