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10 results for “from:Bob Porter”

scientific notation
Bob Porter · Mar 16, 2003 · r-help

If I knew this, I have forgotten it: Is there a way to force R to forgo use of scientific notation, e.g. to use .000029 instead of 2.9e-05? (Aside from using formatC for example) I run across...

environmental variables list
Bob Porter · Oct 24, 2002 · r-help

Is there any place in which the possible or "usual " or "handy" contents (variable settings) of .Renviron and .Rprofile are listed? This is NOT a question about how to use them or what they are for. I just want to...

last plot vanishes
Bob Porter · Dec 3, 2002 · r-help

I intermittently lose the last plot in a series of plots to the win.graph window. I have History enabled and ordinarily can access graphs using pageup and pagedown. Every now and then, the last plot is visible when it...

list function objects only
Bob Porter · Mar 14, 2002 · r-help

I use R and SPlus intensely, yet sporadically, and always seem to forget something essential....even if I keep logs. Anyway, I thought I used to use a command in R to list or identify only those objects that were...

Reminder to register
Bob Porter · Dec 8, 2002 · r-help

This email sent to: r-help at lists.r-project.org Dear INSC Participant: This email is being sent to all email addresses of persons participating in INSC 2003 in Vienna in February, 2003. If you have received this in...

a statistic question about chisq.test() (aprilsun)
Bob Porter · Mar 27, 2003 · r-help

The Chisquare test is based upon a normal approx of the (essentially) binomial distribution for the data in question. Small EXPECTED (not observed) values (<5) suggest a asymetric distribution and potential errors in inferential conclusions. The alternative is the exact...

optimal windows R machine
Bob Porter · Oct 16, 2001 · r-help

For some mysterious reason I do not believe this was delivered to the list. Sorry if it turns out to be a duplicate.---Bob >> Subject: optimal R windows machine I have the happy task of purchasing a new windows desktop...

lowess + turnpoints = doubling integers?
Bob Porter · Dec 29, 2002 · r-help

Happy New Year, r-helpers! I am using lowess to smooth a scatter plot, xx<-lowess(xinput,f=.04) #defaults for other args followed by turnpoints(xx$y) #defaults for other args I plot the smoothed result as well as...

lowess + turnpoints = doubling integers?
Bob Porter · Dec 31, 2002 · r-help

Hello Philippe: Thank you for your interest. I have explored this and it appears to happen with sequences in which small differences between successive occurrences, somewhere in turnpoints, but I have not tracked it down exactly. The following is a...

fisher exact vs. simulated chi-square
Bob Porter · Apr 23, 2003 · r-help

The Chi-Square test is based upon the assumption that the sample is large enough to allow approximation of a (nearly symetric) binomial by a normal distribution. (Chi Sqare is z^2). When expected (NOT observed) cells are too small...

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