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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 11:39 AM
    27 Pages
    1 2 3 ... 27
    • Replies: 391
    • Views: 269,606
    11-05-2017, 08:22 PM Go to last post
  2. 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: 115
    • Views: 111,571
    09-29-2017, 08:14 PM Go to last post
  3. Sticky Thread Sticky: What R packages are you aching to see?

    Are there any R packages that don't yet exist that you wish existed? What kinds of things do you wish were easier to do in R? What things do you...

    Started by Dason‎, 11-19-2015 01:38 AM
    • Replies: 2
    • Views: 13,458
    07-20-2017, 10:43 AM Go to last post
  4. 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
    9 Pages
    1 2 3 ... 9
    • Replies: 120
    • Views: 116,785
    12-13-2016, 05:47 PM Go to last post
  5. 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
    20 Pages
    1 2 3 ... 20
    • Replies: 286
    • Views: 255,445
    09-13-2016, 03:35 PM Go to last post
  6. 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: 100
    • Views: 124,132
    04-14-2016, 01:02 PM Go to last post
  7. 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: 26,121
    10-17-2012, 07:20 PM Go to last post
  1. 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: 2,041
    05-26-2015, 04:21 AM Go to last post
  2. 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: 1,364
    05-25-2015, 08:21 AM Go to last post
  3. 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: 1,429
    05-24-2015, 03:56 AM Go to last post
  4. 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: 1,501
    05-23-2015, 09:52 AM Go to last post
  5. 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: 1,762
    05-22-2015, 11:12 AM Go to last post
  6. 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: 1,194
    05-21-2015, 06:09 PM Go to last post
  7. 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: 3,464
    05-20-2015, 09:50 AM Go to last post
  8. 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: 2,256
    05-20-2015, 09:50 AM Go to last post
  9. 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: 1,643
    05-20-2015, 06:51 AM Go to last post
  10. 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: 1,531
    05-19-2015, 01:50 AM Go to last post
  11. 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: 1,194
    05-17-2015, 04:05 PM Go to last post
  12. 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: 1,104
    05-17-2015, 09:26 AM Go to last post
  13. 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: 1,438
    05-15-2015, 01:59 PM Go to last post
  14. 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: 1,511
    05-15-2015, 12:39 PM Go to last post
  15. 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: 2,416
    05-13-2015, 01:16 PM Go to last post
  16. 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: 1,467
    05-13-2015, 05:42 AM Go to last post
  17. 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: 1,362
    05-13-2015, 04:58 AM Go to last post
  18. 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: 3,095
    05-13-2015, 01:32 AM Go to last post
  19. 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: 1,381
    05-12-2015, 11:39 AM Go to last post
  20. 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: 2,304
    05-12-2015, 07:39 AM Go to last post
  21. 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: 2,112
    05-11-2015, 10:26 PM Go to last post
  22. [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: 2,884
    05-11-2015, 04:29 AM Go to last post
  23. 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: 2,009
    05-11-2015, 03:58 AM Go to last post
  24. 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: 1,316
    05-11-2015, 03:21 AM Go to last post
  25. 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: 991
    05-09-2015, 07:59 PM Go to last post
  26. 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: 1,382
    05-09-2015, 12:45 PM Go to last post
  27. 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: 3,585
    05-08-2015, 05:37 AM Go to last post
  28. 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: 1,448
    05-07-2015, 05:19 PM Go to last post
  29. 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: 1,117
    05-07-2015, 11:53 AM Go to last post
  30. 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: 894
    05-05-2015, 02:57 AM Go to last post
  31. 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 05:46 AM
    correlation, cross, partial
    • Replies: 2
    • Views: 4,513
    05-05-2015, 02:47 AM Go to last post
  32. 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: 10,749
    05-04-2015, 09:08 PM Go to last post
  33. 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: 2,540
    05-02-2015, 09:49 AM Go to last post
  34. 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: 1,634
    05-01-2015, 09:45 AM Go to last post
  35. 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: 3,949
    04-30-2015, 06:24 AM Go to last post
  36. [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: 1,361
    04-28-2015, 08:51 AM Go to last post
  37. 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: 2,821
    04-27-2015, 01:04 PM Go to last post
  38. 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: 1,756
    04-26-2015, 02:19 PM Go to last post
  39. 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: 1,638
    04-26-2015, 01:29 AM Go to last post
  40. 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: 2,154
    04-25-2015, 11:03 AM Go to last post
  41. 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: 3,317
    04-25-2015, 12:02 AM Go to last post
  42. 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: 555
    04-24-2015, 03:12 AM Go to last post
  43. 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: 1,326
    04-23-2015, 04:05 PM Go to last post
  44. 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: 1,728
    04-23-2015, 04:03 PM Go to last post
  45. 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: 3,294
    04-23-2015, 08:06 AM Go to last post
  46. 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: 1,571
    04-23-2015, 07:57 AM Go to last post
  47. 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: 2,714
    04-23-2015, 06:06 AM Go to last post
  48. 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: 1,668
    04-22-2015, 06:26 PM Go to last post
  49. 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: 1,048
    04-22-2015, 01:00 PM Go to last post
  50. 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: 2,148
    04-21-2015, 04:17 PM Go to last post
  51. 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: 2,158
    04-20-2015, 11:29 AM Go to last post
  52. 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: 3,612
    04-20-2015, 05:02 AM Go to last post
  53. 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
    matchit
    • Replies: 1
    • Views: 3,606
    04-18-2015, 04:53 PM Go to last post
  54. 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: 3,522
    04-17-2015, 03:41 AM Go to last post
  55. 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: 1,049
    04-16-2015, 02:48 PM Go to last post
  56. 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: 832
    04-15-2015, 02:19 AM Go to last post
  57. 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: 1,859
    04-14-2015, 09:01 AM Go to last post
  58. 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: 1,644
    04-10-2015, 09:26 AM Go to last post
  59. 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: 1,587
    04-10-2015, 04:44 AM Go to last post
  60. 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: 1,722
    04-09-2015, 10:18 AM Go to last post

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