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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: 348
    • Views: 49,311
    05-11-2015, 08:36 PM 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: 22,313
    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
    news
    • Replies: 107
    • Views: 23,238
    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: 51,939
    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
    information
    • Replies: 99
    • Views: 38,898
    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: 7,376
    10-17-2012, 07:20 PM Go to last post
  1. R: Do I need to change factors to dummies?

    Hello everyone, I am planning to do an analysis with time series data where the dependent variables are mostly factors in R, ranging from 2 to 164...

    Started by Charlotte010‎, Today 06:22 AM
    • Replies: 0
    • Views: 57
    Today, 06:22 AM Go to last post
  2. Calculate prediction values for linear curve estimation for next 5 intervals

    Hi, I have another query : I want to calculate prediction values for linear curve estimation for next 5 intervals. Example : Suppose i have a...

    Started by sajalgoel‎, Yesterday 08:07 AM
    • Replies: 2
    • Views: 80
    Today, 12:37 AM Go to last post
  3. import excel colour coded cells including its colour

    Hi, I am totally new to R. I wondering if R can import the cell background colour of the excel file? Trying to create a piece of code to extract...

    Started by VivianLee‎, Yesterday 08:53 AM
    • Replies: 4
    • Views: 137
    Yesterday, 08:23 PM Go to last post
  4. logistic regression R and Stata grouping variable

    Hello, I mostly use Stata 13 for my regression analysis. I want to conduct a logistic regression on a proportion/number of success. Because I...

    Started by Bruno_L‎, 05-26-2015 06:27 AM
    logistic regression stata
    • Replies: 1
    • Views: 136
    Yesterday, 04:46 PM Go to last post
  5. How to change the parameters of the binomial distribution used in a binomial glmer?

    I wish to assess how being part of a majority helps in emerging as a leader of an animal group. Say I have 10 cases in which I assessed whether...

    Started by Kris_Anathema‎, Yesterday 02:30 PM
    glmer binomial
    • Replies: 1
    • Views: 60
    Yesterday, 04:40 PM Go to last post
  6. Getting a cdf equal to 1 from a variable kernel density estimation

    When I integrate the variable kernel density estimation of a sample from -inf to inf, I should get 1. But it is not what I get with my code below. I...

    Started by Lio67‎, 05-27-2015 07:51 AM
    adaptive kernel density, cdf
    • Replies: 0
    • Views: 86
    05-27-2015, 07:51 AM Go to last post
  7. Calculate Growth Rate

    I am not a math major and I have not done development in R before so please take this into account when reading my question. I currently having a...

    Started by jkruer01‎, 05-27-2015 07:36 AM
    growth curve, growth rate
    • Replies: 0
    • Views: 83
    05-27-2015, 07:36 AM Go to last post
  8. [R] Data Restructuring - New case every X variables

    Dear all, Im new to R so please forgive my rather basic question. I have a data frame like this: the data goes on like this (2k...

    Started by RBOON‎, 05-12-2015 05:02 AM
    • Replies: 5
    • Views: 283
    05-27-2015, 05:44 AM Go to last post
  9. mlogit.data - Error in `row.names

    Hello everyone, I am doing a discrete choice analysis in my master thesis, and have run into trouble with the mlogit-package when setting the...

    Started by hbrandi‎, 05-26-2015 06:16 AM
    • Replies: 0
    • Views: 70
    05-26-2015, 06:16 AM Go to last post
  10. Choice of Threshold (Extreme Value Theory)

    Dear Members; I'm working on Extreme Value Theory (POT method) and I'm trying to determine the appropriate threshold u above it, the mean excess...

    Started by Nour‎, 05-26-2015 04:21 AM
    • Replies: 0
    • Views: 52
    05-26-2015, 04:21 AM Go to last post
  11. Life Table parameters

    Hello, I'm working with mites population and I need to find someway to calculate "intrinsic rate of growth" (rm) parameter for population....

    Started by Felipe Santa Rosa‎, 05-25-2015 08:21 AM
    life tables, mites
    • Replies: 0
    • Views: 94
    05-25-2015, 08:21 AM Go to last post
  12. R Programming

    Hello there, I wanted to learn R programming over this summer hence I registered for the R programming course on Coursera. I understood most part...

    Started by varun1220‎, 05-21-2015 08:20 PM
    • Replies: 2
    • Views: 214
    05-24-2015, 03:56 AM Go to last post
  13. Why R adds an extra category when get data from a CSV

    Hi, I'm trying to load 470 registers from a CSV with 22 columns with my information. In order to see how many data I ve from a categorical data...

    Started by Radel‎, 05-23-2015 06:40 AM
    • Replies: 2
    • Views: 139
    05-23-2015, 09:52 AM Go to last post
  14. Double hierarchical models on MCMCglmm

    I am new using R and I need a model to fit both the mean and the SD of the model (similar to the Double hierarchical generalized linear models). Is...

    Started by Vel‎, 05-22-2015 11:12 AM
    dhglm, mcmcglmm
    • Replies: 0
    • Views: 113
    05-22-2015, 11:12 AM Go to last post
  15. Polynomial Linear Contrast in R

    Hello, I would like to perform a polynomial linear contrast to test for the linear relationship of a variable made of counts with a factor made of...

    Started by pieradibou‎, 05-21-2015 06:09 PM
    • Replies: 0
    • Views: 101
    05-21-2015, 06:09 PM Go to last post
  16. Selection of forecasting method - Winter/ARIMA/TBATS in R

    Please find my dataset and forecast outputs attached. A) First sheet contains March-2011 to February 2014 data and forecast for March-2014 to...

    Started by TheMonkster‎, 05-19-2015 05:30 AM
    • Replies: 3
    • Views: 239
    05-20-2015, 09:50 AM Go to last post
  17. Graph help

    I am completely stumped with how to create a diverging stacked bar graph using my own data. I want to create something looking like this: ...

    Started by Shannon7629‎, 05-20-2015 07:18 AM
    • Replies: 1
    • Views: 158
    05-20-2015, 09:50 AM Go to last post
  18. Extract final values from one run of a simulation

    I ran a simulation using R and because there were a large number of permutations (>10,000) we stored the output of each permutation in a separate...

    Started by michaelmarks‎, 05-19-2015 09:22 PM
    • Replies: 2
    • Views: 132
    05-20-2015, 06:51 AM Go to last post
  19. Explanation of HoltWinters forecast

    Hello Can someone explain in a fairly easy manner why I get this result from a HoltWinters forecast? I think the HW forecast finds a downward...

    Started by BeanJunkie‎, 05-18-2015 08:42 AM
    • Replies: 5
    • Views: 175
    05-19-2015, 01:50 AM Go to last post
  20. Creating a constant variable

    I want to create some constant variables in my dataset, I guess I could do them manually, but I'd rather figure it out in code. I want to create...

    Started by Artreides‎, 05-17-2015 04:05 PM
    • Replies: 0
    • Views: 125
    05-17-2015, 04:05 PM Go to last post
  21. If we like store pdf, with filename of current time?

    Dear- Suppose we make graph in pdf format, every few minutes. Then it might be a good idea to assign a file name with current time, to identify...

    Started by jk90029‎, 05-17-2015 01:19 AM
    • Replies: 1
    • Views: 135
    05-17-2015, 09:26 AM Go to last post
  22. Export simulation results

    Hey all, I am trying to output the simulation results. # Example data set.seed(10) dat<- data.frame(Patno= sample(letters,5),...

    Started by ledzep‎, 05-15-2015 11:31 AM
    • Replies: 1
    • Views: 148
    05-15-2015, 01:59 PM Go to last post
  23. How to make box plots with linear scale

    Hi, Does anyone know if you can make boxplots with a linear scale on the x axis in r? I have read some tutorials on box plots but they only refer...

    Started by karen_508‎, 05-15-2015 12:24 PM
    • Replies: 2
    • Views: 138
    05-15-2015, 12:39 PM Go to last post
  24. Comparing two groups in one scatterplot

    Hello, I am a novice R user. I need to produce a graph comparing two scatterplots (see enclosed file), and have spent hours trying to achieve it...

    Started by radekzadek‎, 05-11-2015 02:00 AM
    • Replies: 6
    • Views: 341
    05-13-2015, 01:16 PM Go to last post
  25. linear regression - modelling dependent variables

    I'm trying to estimate the value of an apartment, by doing a regression through similar apartments. The regression model looks now like this...

    Started by paul15071992‎, 05-13-2015 05:42 AM
    regression, regression equation, regression model
    • Replies: 0
    • Views: 102
    05-13-2015, 05:42 AM Go to last post
  26. How should I fit a linear regression model in R having biological replicates?

    Hi everyone, I need to fit a linear regression model using R. I have the following situation: - 4 different experimental units (say, 4...

    Started by Antonio_Z‎, 05-13-2015 04:58 AM
    biological replicates, linear regression
    • Replies: 0
    • Views: 81
    05-13-2015, 04:58 AM Go to last post
  27. How to run a lagged (time series?) model in R?

    Hi there, I am wanting to run a lagged model where a predictor (X) at T1 is regressed on an outcome (Y) at T2, controlling for Y at T1 plus 2...

    Started by u4596553‎, 05-12-2015 06:34 AM
    arima, lagged effects, lagged variable, time series analysis
    • Replies: 2
    • Views: 152
    05-13-2015, 01:32 AM Go to last post
  28. Last observed day

    Dear R users, I hope some of you will be able to help me out here. I am working with longitudinal follow-up data and am trying to derive the time...

    Started by ledzep‎, 05-12-2015 11:39 AM
    • Replies: 0
    • Views: 120
    05-12-2015, 11:39 AM Go to last post
  29. 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: 8
    • Views: 403
    05-12-2015, 07:39 AM Go to last post
  30. Fantasy Football Graphing

    I'm trying to graph only the highest scorers, of each week, over this 17 week season, for instance Matt Ryan is the week one highest scorer, I would...

    Started by slavedemise‎, 05-08-2015 01:21 PM
    • Replies: 8
    • Views: 396
    05-11-2015, 10:26 PM Go to last post
  31. [R- lmer] Overall variance in mixed Models

    I have data where different measurements in pictures are measured twice. My data: 45 samples (id) 2 Imager (i) 2 Image series (per Imager) (s)...

    Started by Egonfreispiel‎, 05-11-2015 04:29 AM
    • Replies: 0
    • Views: 154
    05-11-2015, 04:29 AM Go to last post
  32. Cross validation for linear mixed effect model

    Hi all, I try to compare predictive performance between linear regression and linear mixed model based on the MAE value calculated from cross...

    Started by Longho‎, 05-11-2015 03:58 AM
    crossvalidation, lme
    • Replies: 0
    • Views: 108
    05-11-2015, 03:58 AM Go to last post
  33. Show graph on RStudio / and simulatneously store as pdf file

    Dear- We know pdf() works fine in RStudio. Suppose a program takes more than 10 minutes to complete a graph. We hope to draw the graph by ...

    Started by jk90029‎, 05-11-2015 03:21 AM
    • Replies: 0
    • Views: 90
    05-11-2015, 03:21 AM Go to last post
  34. Simple way to run BATCH without invoking R program

    Dear- It might be very easy question. Suppose c:\a.txt has R codes with several command lines. There might be some way to run the a.txt...

    Started by jk90029‎, 05-09-2015 06:06 PM
    • Replies: 1
    • Views: 155
    05-09-2015, 07:59 PM Go to last post
  35. Very new to R, need help in merging

    I have a dataset with 74 countries in one column and 74 (repeated) regions in next column. There are 4 levels for regions. I need to make a table...

    Started by sugaire‎, 05-09-2015 08:15 AM
    • Replies: 1
    • Views: 153
    05-09-2015, 12:45 PM Go to last post
  36. 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: 7
    • Views: 431
    05-08-2015, 05:37 AM Go to last post
  37. Transitioning from HLM (program) to R for Multilevel Modeling - Help!

    Hello! Thank you for reading and a big thank you if you can help. My goal is to successfully run this type of model in R. I know how to set up the...

    Started by anova01‎, 05-07-2015 02:30 PM
    • Replies: 3
    • Views: 224
    05-07-2015, 05:19 PM Go to last post
  38. Using R to study temporal alignment

    Hello, I'm new to R, and not a stats specialist at all. For an user experiment, I've collected data. My data consists in 2 variables. The...

    Started by pierreLU‎, 05-07-2015 11:53 AM
    correlation analysis, r-analysis, spatio-temporal analysis
    • Replies: 0
    • Views: 125
    05-07-2015, 11:53 AM Go to last post
  39. Problem with category names in PCAmix

    Hello there, first, I'm really new to R and mainly need to use it for a multiple correspondence analysis with rotation. I have converted my...

    Started by gnr1‎, 05-06-2015 04:45 AM
    • Replies: 0
    • Views: 146
    05-06-2015, 04:45 AM Go to last post
  40. Not able to generate QAICc

    Hello All, I need to generate QAICc. I have installed the package called "MuMIn". Then I successfully run and got the output for the following...

    Started by farooq9786‎, 05-05-2015 02:57 AM
    • Replies: 0
    • Views: 147
    05-05-2015, 02:57 AM Go to last post
  41. Partial Cross-correlation function - how to compute it on R

    I am getting desperate. Computing a cross-correlation function on R is easy: ccf(x,y, ...) and it's done. But what about computing a Partial...

    Started by basouille‎, 12-14-2014 04:46 AM
    correlation, cross, partial
    • Replies: 2
    • Views: 472
    05-05-2015, 02:47 AM Go to last post
  42. The best and quickest way to learn R?

    Hello all, I need to learn and use R real wuick, to analyse my data and have never used it before. :( 1.Which is a more holistic and versatile...

    Started by Deccantraps‎, 07-25-2012 09:41 PM
    • Replies: 14
    • Views: 3,877
    05-04-2015, 09:08 PM Go to last post
  43. 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: 210
    05-02-2015, 09:49 AM Go to last post
  44. 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: 129
    05-01-2015, 09:45 AM Go to last post
  45. 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: 136
    04-30-2015, 06:24 AM Go to last post
  46. [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: 245
    04-28-2015, 08:51 AM Go to last post
  47. 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: 158
    04-27-2015, 01:04 PM Go to last post
  48. 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: 249
    04-26-2015, 02:19 PM Go to last post
  49. 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: 191
    04-26-2015, 01:29 AM Go to last post
  50. 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: 384
    04-25-2015, 11:03 AM Go to last post
  51. 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: 352
    04-25-2015, 12:02 AM Go to last post
  52. 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: 184
    04-24-2015, 03:12 AM Go to last post
  53. 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: 209
    04-23-2015, 04:05 PM Go to last post
  54. 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: 150
    04-23-2015, 04:03 PM Go to last post
  55. 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: 370
    04-23-2015, 08:06 AM Go to last post
  56. 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: 195
    04-23-2015, 07:57 AM Go to last post
  57. 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: 158
    04-23-2015, 06:06 AM Go to last post
  58. 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: 248
    04-22-2015, 06:26 PM Go to last post
  59. 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: 209
    04-22-2015, 01:00 PM Go to last post
  60. 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: 286
    04-21-2015, 04:17 PM Go to last post

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