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Hi, I repeatedly get an error when trying to read an SPSS v. 18 .sav file into R. > require(foreign) Loading required package: foreign > femaleSPSS.dat <- read.spss("female-04-02-2010.sav") Warning message: In read.spss("female-04...

Hi, I want to put text on a plot containing something like: a = b^2 = <squared numeric value of b> using bquote. Example: mu = 5 plot(1:10,1:10) text(2,8, bquote(delta == mu^2)) # This works text...

One way to add the text is to use a list with named elements for the row and column names: > (M <- matrix(1:9, ncol=3, byrow=TRUE, + dimnames=list(" "=LETTERS[1:3], + "THIS IS AN EXAMPLE\nOF a 3x3...

Hi, I'm responding to a post about finding roots of a cubic or quartic equation non-iteratively. One obviously could create functions using the explicit algebraic solutions. One post on the subject noted that the square-roots in those...

There are a couple of points to keep in mind when doing a log-transform of an exponential model, such as -- y = a*exp(b*x) 1. The implicit statistical model is multiplicative in the error. The implied statistical model...

Thanks. This is good to know. -- Larry ---- Original message ---- >Date: Fri, 18 Jun 2010 11:36:40 -0400 >From: David Winsemius <dwinsemius at comcast.net> >Subject: Re: [R] Read SPSS v 18 .sav file >To: David Winsemius <dwinsemius at comcast...

Hi, I'm responding to the question about storage error, trying to read a 3000000 x 100 dataset into a data.frame. I wonder whether you can read the data as strings. If the numbers are all one digit, each...