zhijie zhang wrote: > Dear friends, > I need the get the 2.5% and 97.5% quantile from each row of a matrix, how > should i get it? > BTW, i can get the min/max value from each row of a matrix, using the > following programs, is there an easy function to do it? > > simmin<-matrix(NA,nrow=47,ncol=1) > for (i in 1:47) { > simmin[i,]<-min(datas[i,]) > } > > Thanks for your help.
mymat <- matrix(rnorm(200), ncol=50) apply(mymat, 1, quantile, probs = c(0.025,0.975)) [,1] [,2] [,3] [,4] 2.5% -1.690786 -1.691700 -1.678078 -1.564438 97.5% 1.970500 1.954904 2.249030 1.862571 apply(mymat, 1, max) [1] 2.179982 2.257138 2.772428 2.579247 apply(mymat, 1, min) [1] -2.830661 -1.989114 -1.710050 -2.316970 ?apply -- Chuck Cleland, Ph.D. NDRI, Inc. 71 West 23rd Street, 8th floor New York, NY 10010 tel: (212) 845-4495 (Tu, Th) tel: (732) 512-0171 (M, W, F) fax: (917) 438-0894 ______________________________________________ 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 and provide commented, minimal, self-contained, reproducible code.