Dear Shawin
You probably did not get an answer because
1 - you seem to have posted in HTML which mangled your post into
unreadability
2 - there seem to be lots of lines which do not do anything germane to
the problem.
Why not try summary(y) or str(y) before you convert it to a matrix and
see what it says?
On 31/08/2015 20:46, shawin wrote:
I have an issue ans i posted it , so i would like to receive a solution
please
On Mon, Aug 31, 2015 at 8:35 PM, shawin [via R] <
ml-node+s789695n4711689...@n4.nabble.com> wrote:
I have a data frame csv file and I'm trying to calculate median for each
group separately row by row . When I separate the data frame in two groups
and calculate the median for each one, I am getting an NA result for the
second group :
the data
x1 x2 x3 x4 x5 x6 x7 y1 y2 y3 y4 y5 y6 y7 y8
9.488404158 9.470895414 9.282433728 9.366707445 9.955383045 9.640816474
9.606262272 9.329651027 9.434541611 9.473922432 9.311412966 9.3154885
9.434977488 9.470895414 9.764258059
8.630629966 8.55831075 8.788391003 8.576231135 8.671587906 8.842979993
8.861958856 8.58330436 8.603596508 8.570129609 8.59798922 8.572686772
8.679751791 8.663950953 8.432875347
9.354748885 9.367668838 9.259952558 9.421538213 9.554635162 9.603744578
9.452197983 9.284228877 9.404607878 9.317737979 9.343115301 9.310644266
9.27227486 9.360337823 9.44706281
9.944863964 9.950427516 10.19101759 10.07350804 10.03269879 10.1307908
10.03487287 9.74609383 9.886379007 9.775472567 10.036596 9.544738458
9.699611598 9.911962567
9.625804277
Code:
rowN <- nrow(AT1)
MD1<-vector(length=rowN)
MD2<-vector(length=rowN)
MD1[1:rowN]<-NA
MD2[1:rowN]<-NA
x<- AT1[,c(2,3,4,5,6,7,8) ]
write.csv(x,"x.csv",row.names=TRUE)
x<-as.matrix(x)
for(i in 2:rowN) {
MD1[i]=median(x[i,])
}
write.csv(MD1,"MD1.csv",row.names=TRUE)
y<- AT1[,c(9,10,11,12,13,14,15,16)]
write.csv(y,"y.csv",row.names=TRUE)
y<-as.matrix(y)
for(j in 2:rowN) {
MD2[j]=median(y[j,])
}
write.csv(MD2,"MD2.csv",row.names=TRUE)
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