[R] Remove columns

Hi Everbody Could somebody help me.? I need to remove the columns where the sum of it components is equal to zero. For example > a<-matrix(c(0,0,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0,0,1,1,0,0,1,0), ncol=4) > a [,1] [,2] [,3] [,4] [1,]0001 [2,]0101 [3,]00

[R] Lists

Hi Everybody I have the following problem suppose that we a<-c("uno","dos","tres") I am working with a while cycle and the idea is in each iteration adding an item to a list In the first iteration the resultshould be: [[1]] [1] "uno" In the second [[1]] [1] "uno" [[2]] [1] "dos" And the fina

[R] Help

Dear R project group I have the following problem Let suppose the following data: b<-c("0","1","1","1","0","1","0","0","1","0","1","1","1","0","1","1","0","1","1","0") bm<-matrix(b,ncol=4) colnames(bm)<-c("F1", "F2", "F3", "F4") d<-c("F1","F4") For the matrix bm i need to create a fifth colum

[R] I need to obtain all the rows in m1 in which m2 the elements of m2 are present

Hi could you yelp me please with this Suppose that we have the following matrix m1<-matrix(c("a","7","a","i","o","u","i","1","2","3","4","5","6","7"), ncol=2) m1 [,1] [,2] [1,] "a" "1" [2,] "7" "2" [3,] "a" "3" [4,] "i" "4" [5,] "o" "5" [6,] "u" "6" [7,] "i" "7" m2<-c("a","7") I need

[R] Rows for a list of values

Hi could yelp me with this Suppose that we have the following matrix m1<-matrix(c("a","e","a","i","o","u","i","1","2","3","4","5","6","7"), ncol=2) m2<-c("a","i") m1 [,1] [,2] [1,] "a" "1" [2,] "e" "2" [3,] "a" "3" [4,] "i" "4" [5,] "o" "5" [6,] "u" "6" [7,] "i" "7" I want to obt

[R] Arules questions. I need some help please

Question 2a) I am also working with arules package and I have the following problem let suppose the matrix b like: b<-matrix(c(1,1,1,1,1,1,0,0,1,1,1,1,0,0,1,1,0,1,1,1,1,1,1,1),nrow=6) rownames(b)=c("T1", "T2", "T3", "T4", "T5", "T6") colnames(b)=c("It1", "It2", "It3", "It4") bt<-as(b, "transactions

Re: [R] Extract pairs (rowname, columname) from a matrix where value is 0

Dear sir, I have 2 questions: Question 1: suppose that we have the following: a<-matrix(c(0,2,0,4,0,6,5,8,0),nrow=3) colnames(a)<-c("F1","F2","F3") rownames(a)<-c("A1","A2","A3") a ind <- which(a == 0, arr = TRUE) mapply("[", dimnames(a), as.data.frame(ind)) I want to add a column to the resu

Re: [R] Extract pairs (rowname, columname) from a matrix where value is 0

paste(rn[x[1]],",", cn[x[2]], sep ="") > > ) > >) > > > > # res > > # 1 A1,F1 > > # 2 A3,F1 > > # 3 A2,F2 > > # 4 A3,F3 > > > > See ?which, ?apply and ?paste fo

[R] Extract pairs (rowname, columname) from a matrix where value is 0

Dear sir, I have a matrix like a<-matrix(c(0,2,0,4,0,6,5,8,0),nrow=3) colnames(a)<-c("F1","F2","F3") rownames(a)<-c("A1","A2","A3") a F1 F2 F3 A1 0 4 5 A2 2 0 8 A3 0 6 0 I want to extract all pairs (rownames, columnames) from which the value in the matrix is 0 The result should be