apply(yourdata[, c("X2N_CHB","X2N_AA","Counts_CHB","Counts_AA")], 1, function(x) fisher.test(cbind(x[3:4], x[1:2]-x[3:4]))$p.value) ------------------------------------------------------------------- Jacques VESLOT
CNRS UMR 8090 I.B.L (2ème étage) 1 rue du Professeur Calmette B.P. 245 59019 Lille Cedex Tel : 33 (0)3.20.87.10.44 Fax : 33 (0)3.20.87.10.31 http://www-good.ibl.fr ------------------------------------------------------------------- jenny tan a écrit : > Hi, > > I have a table of observed counts for various genetic markers. Instead of > doing Fisher's exact test for each marker one at a time and recording the P > value manually, is there a script to go through the whole list and generate > the P value column automatically? > > An example of my data: > > > Counts_CHB and Counts_AA are the observed counts for one allele. > 2N_CHB and 2N_AA are the total number of alleles. > > gene Local_Pos 2N_CHB 2N_AA Counts_CHB Counts_AA Exact_P > B2M 2475 90 46 0 5 > B2M 3532 90 44 0 1 > FCN2 2203 88 46 0 1 > FCN2 3536 90 46 0 9 > FCN2 4027 84 46 0 9 > FCN2 4036 90 46 0 9 > FCN2 4318 90 46 0 9 > FCN2 4392 90 46 0 9 > FCN2 9575 90 46 0 1 > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html > ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html