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Hi Sayan, This is exactly what I was looking for - it worked perfectly. Many thanks!! Also, thanks to everyone else for their suggestions. Pele -- View this message in context: http://r.789695.n4.nabble.com/For-loop-with-ifelse-help...

Hi R users, I have a factor variable called date as shown below: Can anyone share the best / most efficient way to extract year and week (e.g. year = 2006, week = 52 for first record, etc..)? My data set has...

Hi R users, Can anyone share some example code using merge_all (from the reshape package) to merge 10 data frames into 1 file. Thanks in advance for any help! -- View this message in context: http://www.nabble.com/Merge...

Hi David - thanks for your suggestion, but I am trying to avoid doing any merging and sorting for this step because the real file I will be working with has about 20 million records. If I can get this loop...

Hi R users, I am doing cross correlation analysis on 2 time series (call them y-series and x-series) where I need the use the model developed on the x-series to prewhiten the yseries.. Can someone point me...

Hi R users, I have a time series variable that is only available at a monthly level for 1 years that I need to decompose to a weekly time series level - can anyone recommend a R function that I can...

Hi Uwe, You are correct - that was a type O (52) and thanks for you your suggestion that works.. Pele wrote: > > > > Hi R users, > > I have a factor variable called date as shown below: Can anyone share the > best / most...

Hello R users, Can someone tell if there is a package in R that can do outlier detection that give outputs simiilar to what I got from SAS below. Many thanks in advance for any help! Outlier Details Approx Chi...

Hi Bob - your suggesting worked out great... Many thanks! Also, thanks everyone for the other suggestions! Bob McCall wrote: > > Look in the package "forecast" for the function "Arima". It will do what > you want. It's different than arima function...

Hi R users, I am looking for a date function that will give the following: - The number-of-week value is in the range 01-53 - Weeks begin on a Monday and week 1 of the year is the week...

Hello, i am a newby on R and i am trying to make a backward selection on a binomial-logit glm on a large dataset (69000 lines for 145 predictors). After 3 days working, the stepAIC function did not terminate...

Hi Stephen, I am doing cross correlation analysis and I am trying to find a outlier detection function in R that can detect changes in the level of the response series that are not accounted for by the estimated model...

Hi R users, I have an R object with the following attributes: > str(sales.bykey1) 'by' int [1:3, 1:2, 1:52] 268 79 118 359 87 147 453 130 81 483 ... - attr(*, "dimnames")=List of 3 ..$ GROUP: chr...

Hello R users, I have been trying to output all my results (text, plots, etc) into the same postscript file as one document, but have been unable to...Can anyone help me improve my code below so that I can...

Hello everybody, That is the first time that I am working on a SVM modeling and I would like to calculate by myself the result values from the SVM for each line of my database (named x_appr_svm). First...

Hi R users, Is there an easy way in R to generate the results table below using table 1 and the formula (simplified version of the real problem)? It would be easy if I knew the R equivalent of SAS...

Hello R users, I have been trying to output all my results (text, plots, etc) into the same postscript file as one document, but have been unable to...Can anyone help me improve my simplified version of the code below...

Hi Kingsford - this is exactly what I am looking for... Many thanks!! Kingsford Jones wrote: > > I'm guessing you processed a data frame with the 'by' function. > Rather than restructuring the by output, try using a different > function on your...

Hi R users, I am trying to compare 2 data frames by subject and match and save the no matches to an object called nomatch, but I am getting unexpected results... Can anyone tell me how to correct the code...

Hi R users, I have a data frame that contains 10K obs and 200 variables where I am trying to format the numeric columns to look like the output table below (format to 2 decimal places) but I am having...