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
Bottles of beer
Is this matrix orthogonal?
Number of 1s in a binary string
Simple equation: Annual salary
Find the hypotenuse
Word Counting and Indexing
Who Has the Most Change?
Find the sum of all the numbers of the input vector
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