| | A path in the score matrix and the associated aligment
The Needleman - Wunsch dynamic programming algorithm module offers different vizualisation levels. On the first one, the user visualizes the path in the distance matrix associated with each possible alignment, as a result of the execution of the algorithm on two given sequences. The distance matrix can be displayed and filled step by step. Each computation step is graphically explained.
| | The score matrix
Once the matrix has been completely filled, the pathway is constructed, to give the best scoring alignment. The student is also asked to construct himself a path that leads to an optimal alignment.