Question: How to test the distribution of (site frequency spectrum) SFS?
0
gravatar for wang.yiguan
3 months ago by
wang.yiguan10
wang.yiguan10 wrote:

I have the SFS of synonymous sties and non-synonymous sites. It seems more non-synonymous sites are located at low frequency spectrum, which might indicate purifying selection. But how can I test the difference of the two distributions. I noticed some papers using Mann-Whitney U Test. But I am questioning of the application. For example,

x <- c(1,3,5,7,9)

z <- c(9,7,5,3,1)

x and z are clearly different distributions, but the U test gives:

wilcox.test(x,z)

Wilcoxon rank sum test with continuity correction

data: x and z

W = 12.5, p-value = 1

alternative hypothesis: true location shift is not equal to 0

p = 1, no difference! Where is the problem?

Thanks!

snp R • 121 views
ADD COMMENTlink written 3 months ago by wang.yiguan10
Please log in to add an answer.

Help
Access

Use of this site constitutes acceptance of our User Agreement and Privacy Policy.
Powered by Biostar version 2.3.0
Traffic: 753 users visited in the last hour