Hello
I have a 100*100 matrix which is from a intensive computation, e.g. mat. Is
there any method/function that return the max of every row and the subscript of
maximum value simultaneously
#define the function
> returnfunction<-function(x){
+ value<-apply(x,1,max)
+ index<-apply(x,1,which.max)
+ }
> mat<-matrix(c(3,5,7,2,1,10,4,3,2),3)#initilize the matrix for test
> mat
[,1] [,2] [,3]
[1,] 3 2 4
[2,] 5 1 3
[3,] 7 10 2
> returnfunction(mat)$value
Error in returnfunction(mat)$value :
$ operator is invalid for atomic vectors
> returnfunction(mat)$index
Error in returnfunction(mat)$index :
$ operator is invalid for atomic vectors
the "returnfunction(mat)$value" should be 4,5,10
the "returnfunction(mat)$index" should be 3,1,2
Thank you in advance
ZhaoXing
Department of Health Statistics
West China School of Public Health
Sichuan University
No.17 Section 3, South Renmin Road
Chengdu, Sichuan 610041
P.R.China
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