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 state names that start with the letter N
Angle between two vectors
How long is the longest prime diagonal?
Rotate input square matrix 90 degrees CCW without rot90
Test if two numbers have the same digits
Tic Tac Toe FTW
Counting in Finnish
What is the next step in Conway's Life?
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