search for: vadlamani

Hi: I am a new R user. I have the following question and would appreciate your input Data1 (data frame 1) p1,d1,d2 (p1 is text and d1 and d2 are numeric) xyz,10,25 Data2 (data frame 2) p1,d1,d2 xyz,11,15 Now I want to create a new data frame that looks like so below. The fields d1 and s2 are summed by the product key. Data3 p1,d1,d2 xyz,21 (sum of 10 from Data1 and 11 from Data2),40 (sum of 25

Hi: Suppose that I have a data frame as below x1 x2 x3 ... x10 wk1 wk2 ... Wk208 (these are the column names) For each record, x1, x2, x3 ... x10 are attributes. and wk1, wk2, ..., wk208 are the sales recoreded for this attribute combination. Suppose that now, that I want to do the following 1. Merge the data frame so that I have a new data frame grouped by values of x2 and x3 (for example).

Hi: If I want to read a file with read.table. I want x1 and x2 to be read as character and x3 as numeric. How to do this? Thanks. Satish x1 ,x2,x3 10,20,30 11 ,22,35

Hello All: I have the following question # instantiate a date current = as.Date("2009/10/25") #generate a sequence of dates in the future future_dates = seq(current,by='1 week',length=53) Question: How to generate a sequence of past dates starting one week in the past relative to the current date. Obviously, what I wrote below is not correct. I think I can write a for loop and

Hi: I have a question about installing R (and modules) on a Unix system (AIX). Can I just gunzip (or the equivalent) the installation files into my home directory or will I need someone with root access to install R? I am hoping that the answer is the former (I can unzip all files to a directory R that I create under my home directory and I can start using it). Could you please help me with this

...Enthusiastic Users of R, June 18-19, 2009       (HRISHIKESH D. VINOD)   44. Importing csv file with character values into sqlite3 and       subsequent problem in R / RSQLite (Stephan Lindner)   45.  pgmm (Blundell-Bond) sample needed) (Millo Giovanni)   46. 64 bit compiled version of R on windows (Vadlamani, Satish {FLNA})   47. Re: how to input multiple .txt files (hadley wickham)   48. Re: HELP WITH SEM LIBRARY AND WITH THE MODEL'S SPECIFICATION       (John Fox)   49. Re: 64 bit compiled version of R on windows (Duncan Murdoch)   50. ggplot2-geom_text() (Felipe Carrillo)   51. Re: Constrined dep...

Hello All: We are looking for various web development choices out there and many have suggested RoR to be a good way to go with, especially its ease to use and faster development. The end result of the web app will look something similar to Yahoo finance - so I am wondering if existing RoR views capability will be able to deliver this to me. My friends who are in .NET are Java tells me that its

Hi: For those of you who are adept at both SAS and R, I have the following questions: a) What are some reasons / tasks for which you would use R over SAS and vice versa? b) What are some things for which R is a must have that SAS cannot fulfill the requirements? I am on the ramp up on both of them. The general feeling that I am getting by following this group is that R updates to the product are