See my function "seqle" on FileExchange. It may not be as compact, but it's easy to use and both encodes and decodes.
The problem statement would have been clearer if the principle of RLE had been explained with an encoding example first. Alternatively, it would have been useful to explicitly mention that the data in vector x is being read pairwise.
ugly but more fun than loops!
note: repelem did not exist back when this problem was created
not limited to 1-9
This is my favourite
Best score without regexp
Find relatively common elements in matrix rows
Clean the List of Names
Switch matrix to a column vector
Find the longest sequence of 1's in a binary sequence.
Find the peak 3n+1 sequence value
Find common elements in matrix rows
Tic Tac Toe FTW
Renaming a field in a structure array
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