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coppola
2006 Oct 15
2
overlapping intervals
Hello everybody,
I have two series of intervals, and I'd like to output the shared
regions.
For example:
series1<-cbind(Start=c(10,21,40,300),End=c(20,26,70,350))
series2<-cbind(Start=c(25,60,210,500),End=c(40,100,400,1000))
> series1
Start End
[1,] 10 20
[2,] 21 26
[3,] 40 70
[4,] 300 350
> series2
Start End
[1,] 25 40
[2,] 60 100
[3,]
2004 Dec 30
1
t-test pvalue
Hi all,
I have some t-test values, and I am trying to obtain the associated p-values.
Is 'pt' the right command? I wonder why 1) it returns different values for
x and -x, and 2) how to obtain a 2-sided p-value.
example [R version 2.0.1, WinXP]:
#if t=2.23 (df=10), the expected p-value is 0.05 for 2-sided and 0.025 for
1-sided t-test
pt (2.23,10)
[1] 0.9750788
pt (-2.23,10) #or pt