Hi
I'll study your answers.
I could also try
gsub("01", "00", x) N times
but it could be very slow if N is large
In fact when I wrote 111110011 I mean a vector
1
1
1
1
1
0
0
1
1
not a string, but I wrote it more compactly.
I also could by shifting the elements of the vector one position and ANDing
the result with the original. And again shifting 2 postions and so on up to
N. But it's very slow.
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