R, in a table, how to move rows at the bottom? -



R, in a table, how to move rows at the bottom? -

i have table this

a:

10 11 12 13 14

20 21 22 23 24

30 31 32 33 34

40 41 42 43 44

50 51 52 53 54

and want table this:

b

30 31 32 33 34

40 41 42 43 44

50 51 52 53 54

10 11 12 13 14

20 21 22 23 24

that means need take first k rows of initial matrix , set them @ bottom of matrix. how it?

how b a?

thanks

untested reasonable chance of success:

a[c( (k+1):nrow(a), 1:k) , ]

if k represents both number of rows move , w+k want them moved and there sufficient rows allow happen, perhaps untested code succeed requested modification:

a[ c( 1:(w-1) , (w+k+1):(w+2*k+1), w:(w+k), (w+2*k+2):nrow(a) ) , ]

r table matrix

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