Displaying 2 results from an estimated 2 matches for "jas4710".
2010 Nov 22
2
how to loop through variables in R?
After importing a table with "M" variables and "N" records, I'd like to
calculate chi-square statistics, say, between N1, N2; N1, N3, ..., N1, Ni,
and then N2, N3, ... N2, Ni, ..., Ni-1, Ni. Two loops should be ok but the
manual & online help don't show a systematic way to do so but instead show
hard-code examples so users have to type in the names themselves one
2012 Oct 01
1
Retrieve hypergeometric results in large scale
I'm going to use
dhyper(x, m, n, k)
to get a 95% coverage. Let me use an example to explain my problem:
Suppose I have a urn containing 90 red and 10 black balls.
Now I wanna remove 3 from the urn. By the following codes:
m<-90;n<-10;k<-3;
x<-0:3
dhyper(x,m,n,k)
I can obtain the probability that 0,1,2,3 red balls will be removed.
0.000742115 0.025046382 0.247680891