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
Project Euler: Problem 2, Sum of even Fibonacci
Back to basics 23 - Triangular matrix
letter yes yes & letter no no
Fill a zeros matrix
Convert from Fahrenheit to Celsius
Read a column of numbers and interpolate missing data
Extract leading non-zero digit
Add two numbers
Determine whether a vector is monotonically increasing
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