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whinlatter
2006 Sep 08
1
Computing skewness and kurtosis with the moments package
Hi,
I'm a newcomer to R, having previously used SPSS. One problem I have
run into is computing kurtosis. A test dataset is here:
http://www.whinlatter.ukfsn.org/2401.dat
> library(moments)
> data <- read.table("2401.dat", header=T)
> attach(data)
> loglen <- log10(Length)
With SPSS, I get
Skewness -0.320
Kurtosis -1.138
With R:
> skewness(loglen)
[1] -0.317923
> kurtosis(loglen)
[1] 1.860847
Using the e...
2007 Feb 08
1
Problem with factor state when subset()ing a data.frame
Hi folks,
I am running into a problem when calling subset() on a large
data.frame. One of the columns contains strings which are used as
factors. R seems to automatically factor the column when the
data.frame is contstructed, and this appears to not get updated when I
create a subset of the table.
A minimal testcase to demonstrate the problem follows:
sample <- data.frame(c("A",