Given a "counting sequence" vector x, construct the original sequence y.
A counting sequence is formed by "counting" the entries in a given sequence. This is sometimes called run-length encoding.
For example, the sequence
x = 2, 5, 1, 2, 4, 1, 1, 3
can be read as
Two 5's, one 2, four 1's, one 3
which translates to
y = 5, 5, 2, 1, 1, 1, 1, 3
So y is the reconstructed vector that corresponds to the counting sequence x.
For this problem, all elements in the sequences x and y will be in the range from 1 to 9.
Solution Stats
Problem Comments
5 Comments
Solution Comments
Show comments
Loading...
Problem Recent Solvers2730
Suggested Problems
-
Remove all the words that end with "ain"
2724 Solvers
-
Project Euler: Problem 10, Sum of Primes
2129 Solvers
-
Find nearest prime number less than input number
1020 Solvers
-
Sum of odd numbers in a matrix
622 Solvers
-
8644 Solvers
More from this Author96
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
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.
easy
useful challenge
useful