R help - Jun 2007 - How should i get the quantile 2.5 % and 97.5% in each row of a matrix?

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.
-- 
With Kind Regards,

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Zhi Jie,Zhang ,PHD
Tel:86-21-54237149
Dept. of Epidemiology,School of Public Health,Fudan University
Address:No. 138 Yi Xue Yuan Road,Shanghai,China
Postcode:200032
Email:epistat@gmail.com
Website: www.statABC.com
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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

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