R stri_locate_all, Creating a start and end matrix -


i trying create matrix looks this, using stri_locate_all function. 

x <- "abcdjakslabcdakjsabcd" m <- stri_locate_all_regex(x, 'abcd') m [[1]]      start end [1,]     1   4 [2,]    10  13 [3,]    18  21

i tried converting m matrix, seems wrap around wrong way:

output <- matrix(unlist(m), ncol = 2, byrow = true) output      [,1] [,2] [1,]    1   10 [2,]   18    4 [3,]   13   21

i want output start locations in first column , end locations in second column matrix this. 

     [,1] [,2] [1,]     1   4 [2,]    10  13 [3,]    18  21


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