R - reshaping 2 column data frame to multiple column matrix [duplicate]

Answer 1

 unstack(dat,V2~V1)
  name.a name.b name.c
1      5      2      1
2      4      3      5
3      1      2      6

using other libraries:

library(tidyverse)
dat%>%group_by(V1)%>%mutate(id2=1:n())%>%spread(id2,V2)
# A tibble: 3 x 4
# Groups:   V1 [3]
      V1   `1`   `2`   `3`
*     
1 name.a     5     4     1
2 name.b     2     3     2
3 name.c     1     5     6

data:

dat=read.table(h=F,sep=",",stringsAsFactors = F,strip.white = T,text=' "name.a", 5
"name.a", 4
               "name.a", 1
               "name.b", 2
               "name.b", 3
               "name.b", 2
               "name.c", 1
               "name.c", 5
               "name.c", 6')