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 the two most distant points
First non-zero element in each column
Is it an Armstrong number?
Sum of the Matrix Elements
Convert radians to degrees
Longest Divisor Run
What is the next step in Conway's Life?
Find relatively common elements in matrix rows
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