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Dear R-help Members, I am wondering if anyone think of the optimal way of computing for several numeric variable the difference between 2 levels of a factor. To be clear let's generate a simple data frame with 2 numeric variables collected for different subjects (ID) and 2 levels of a TIME factor (time of evaluation)

DEar list members, I am currently using Sweave with LaTeX which is great. I can use xtable for formatting outp of tables but I have a problem setting the number of decimals in xtables when used with dataframe. I have found an example on the net ith matrix and it works. For example this works : > > tmp <- matrix(rnorm(9), 3, 3) > > xtmp <- xtable(tmp) > > digits(xtmp)

...e: statistical test for comparison of two classifications (nominal) (Matt Shotwell) 39. Re: Check for is.object (Phil Spector) 40. Re: "negative alpha" or custom gradient colors of data dots in scatterplot ? (Ista Zahn) 41. Problem setting the number of digits in xtable (wphantomfr) 42. RCurl : All connection are used ? (omerle) 43. sm.ancova graphic (Lucia Ca?as) 44. Plotting a cloud/fog of variable density in rgl (JiHO) 45. Re: RCurl : All connection are used ? (Mike Marchywka) 46. Re: Ordeing Zoo object (Manta) 47. Re: Plotting a cloud/fog of variable density i...

Dear R-help members, I'm trying to run LME model on some behavioral data and need confirmations about what I'm doing... Here's the story... I have some behavioral reaction time (RT) data (participants have to detect dome kind of auditory stimuli). the dependant variable is RT measured in milliseconds. 61 participants were tested separated in 4 age groups (unblanced groups,