Re: [R] Power graph for two Proportion
On Tue, 17 Jun 2014 10:30:17 AM suganthiny cumarasamy wrote: > Dear R mailing listers, > > I am try to find the different power calculation for > p1=0.2 and p2=0.4 , with significant level=0.05 (one sided test) > I would like to have a graph y -axis as a power and > x-axis as a sample size . > > I run this command for different value of power. and get the n and power > pwr.2p.test(h=ES.h(0.4,0.2), power = 0.87, > sig.level=0.05,alternative="greater") > > Is there is any easy way i can do power graph using the two proportion in > R. > Hi Suga, I'm not familiar with pwr.2p.test, but if it takes a vector of power values, you could do something like this: # get a vector of sample sizes for different values of power # it probably won't be this straightforward powers<-seq(0.5,0.95,by=0.05) sample_sizes<-pwr.2p.test(h=ES.h(0.4,0.2),power=powers, sig.level=0.05,alternative="greater") plot(sample_sizes,powers) Jim __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Power graph for two Proportion
Dear R mailing listers, I am try to find the different power calculation for p1=0.2 and p2=0.4 , with significant level=0.05 (one sided test) I would like to have a graph y -axis as a power and x-axis as a sample size . I run this command for different value of power. and get the n and power pwr.2p.test(h=ES.h(0.4,0.2), power = 0.87, sig.level=0.05,alternative="greater") Is there is any easy way i can do power graph using the two proportion in R. Thanks soo much any of your help Suga [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Power graph for two Proportion
Suga, Perhaps something like this ... library(pwr) n <- 50:100 power <- pwr.2p.test(h=ES.h(0.4,0.2), n=n, sig.level=0.05, alternative="greater")$power plot(n, power) Jean On Mon, Jun 16, 2014 at 10:44 AM, Suganthie Jeyaganth wrote: > Dear R mailing listers, > I am try to find the different power calculation for > > p1=0.2 and p2=0.4 , with significant level=0.05 (one sided test) > > I would like to have a graph y -axis as a power and > > x-axis as a sample size . > > I run this command for different value of power. and get the n and power > > to draw a graph > > pwr.2p.test(h=ES.h(0.4,0.2), power = 0.87, > sig.level=0.05,alternative="greater") > > > Is there is any easy way i can do this in R. > Thanks > > > Suga > [[alternative HTML version deleted]] > > > __ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > > [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Power graph for two Proportion
Dear R mailing listers, I am try to find the different power calculation for p1=0.2 and p2=0.4 , with significant level=0.05 (one sided test) I would like to have a graph y -axis as a power and x-axis as a sample size . I run this command for different value of power. and get the n and power to draw a graph pwr.2p.test(h=ES.h(0.4,0.2), power = 0.87, sig.level=0.05,alternative="greater") Is there is any easy way i can do this in R. Thanks Suga [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.