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57 results for “from:John Christie”

installing a local package in RAqua
John Christie · Nov 18, 2003 · r-help

Hi, How does one install a package that is local rather than on CRAN?

simple sphericity test using bartlett and cov?
John Christie · Dec 4, 2003 · r-help

Hey, Is this right for a sphericity test? x <- mymatrix mycov <- cov(x) bartlett.text (array (mycov), myconditions)

disappointed (card model)
John Christie · Oct 23, 2003 · r-help

I was very disappointed to find that there are no R packages for blackjack or at least a model for cards. Anyone know of one?

what does this mean in R-1.8.1 release notes?
John Christie · Nov 21, 2003 · r-help

what does this mean in R-1.8.1 release notes? o median() no longer `works' for odd-length factor variables.

lme error terms
John Christie · Dec 11, 2003 · r-help

I was performing a repeated measures analysis using lme. I can get the F terms using the anova command but how do I get the error terms for the F's?

contrasts??
John Christie · Aug 13, 2003 · r-help

I was looking at the contrasts function in the search for planned contrast functions. aov take a contrast variable but I don't see how to use it. Is there a planned contrast capability in aov?

CircStats reveals underlying R bug?
John Christie · Nov 11, 2003 · r-help

circ.plot in CircStats under R 1.8.0 yields incorrect plots (easily compare hist() and rose.diag()). However, the code in circ.plot has not changed. Has anyone tracked this down yet?

R GUI for Mac OS X bug
John Christie · Aug 5, 2006 · r-help

Hi, I found a highly reproduceable bug in the version that comes with 2.3.1 and I just thought I'd let the authors know. Pressing " and then tab instantly crashes it every time.

VR (looking for MASS) on OS X
John Christie · Mar 25, 2006 · r-help

Hey, when did I lose MASS? Anyway, I found the VR package but she's not compiling on OS X. Any tips? Yes, I have the developer tools and Fortran. Could someone send me a compiled package?

P-P probability plots?
John Christie · Sep 8, 2003 · r-help

Hi, I see that there is a standard function for Q-Q normal plots in R but couldn't find anything for normal probability plots. To my eyeballs the latter are easier to interpret. Is there a function in some...

stably updating the SD
John Christie · Dec 16, 2008 · r-help

Hi, I have some summary data from which I know a few points and I'd like to remove them. Does anyone know if there is an R module that implements something like Hanson (1975)? Hanson (1975). Stably updating mean...

compare two linear regression slopes
John Christie · Aug 19, 2003 · r-help

Hi, I'm sort of new to regression, but I was wondering how one compares two regression slopes in R. Is it just a matter of calculating the slopes and then using the SD reported by R to test for...

2.3.0 glitch on OS X
John Christie · May 8, 2006 · r-help

Perhaps it is just a glitch in the GUI as it does not happen in the console version. Calls to demo() without arguments and help(packages=X) return nothing in the GUI but work in the console. I d/l...

manova and repeated measures
John Christie · Mar 17, 2006 · r-help

OK, I give up, I search everywhere and tried a few things and I just cannot seem to figure out how to perform a MANOVA in R on my data. It is a 2x2 within (repeated measures) x 2 between...

calculating area under the ROC curve
John Christie · May 1, 2007 · r-help

Hi, I recently did a study where we gathered decisions and confidence ratings. My understanding is that I can convert this to a ROC curve by getting hits and false alarms at the various confidence ratings. I figured out that...

lmer print outs without T
John Christie · Jul 4, 2006 · r-help

Hi, I have been having a tedious issue with lmer models with lots of factors and lots of levels. In order to get the basic information at the beginning of the print out I also have to generate these enormous...

VR (looking for MASS) on OS X
John Christie · Mar 26, 2006 · r-help

OK, that worked great. But, oddly enough, in the Mac OS X version of R the packages are not in the distribution, and VR does not come up as a binary in the GUI (only as source). Anyway, it didn...

compare two linear regression slopes
John Christie · Aug 19, 2003 · r-help

On Tuesday, August 19, 2003, at 09:20 PM, Simon Blomberg wrote: > You need to look at Analysis of Covariance in any basic stats book. > Basically, if you have y versus x for 2 groups ("group" is a factor), > use...

is zscore() deprecated or Windows only?
John Christie · Aug 29, 2003 · r-help

Hi I was looking through the help on how to get standardized scores and came across an anomaly. The help.search("zscore") reports there is such a function in R.base. However, when I try to get help on zscore...

fit.contrast or some other for interactions and stratified
John Christie · Apr 6, 2004 · r-help

I was trying to do a bunch of planned contrast but ran into a snag. fit.contrast won't work with an Error term in aov. Ok, then I use lme. Only, now it seems there is no way to...

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