Questions tagged [traversal]
The traversal tag has no usage guidance.
7
questions
33
votes
5
answers
2k
views
How to perform a depth-first preorder traversal of an expression?
Mathematica provides functions that perform a depth-first postorder traversal, or which use such a traversal, including: Scan, ...
- 270k
28
votes
7
answers
2k
views
How to perform a breadth-first traversal of an expression?
Mathematica provides functions that perform a depth-first traversal, or which use such a traversal, including: Scan, Count, <...
- 270k
12
votes
1
answer
428
views
Position with Except returns first item {0} and last item {}. Why?
Here is a simple list:
l={1, 0, 2, 1, 0, 1, 0, 1, 2, 0, 2, 0, 1, 0, 1, 0, 0}
To get the position of non-zero elements I use ...
- 547
3
votes
1
answer
214
views
why Level does not sort output according to their levels
Consider this example:
Level[a + f[x, y^n], {0, Infinity}]
(*{a, x, y, n, y^n, f[x, y^n], a + f[x, y^n]}*)
Why the output is sorted in this way. why not ...
- 19.7k
14
votes
3
answers
752
views
Determining all possible traversals of a tree
I have a list:
B={423, {{53, {39, 65, 423}}, {66, {67, 81, 423}}, {424, {25, 40, 423}}}};
This list can be visualized as a tree using ...
- 10.4k
4
votes
1
answer
308
views
Forcing optimal solution for FindShortestTour
I use FindShortestTour as explained here and it works nicely for a small number of cities. However when I try this with as little as 16 cities, the given tour isn't ...
- 141
9
votes
1
answer
431
views
How to perform a depth-first in-order traversal of an expression?
To complement my earlier questions:
How to perform a breadth-first traversal of an expression?
How to perform a depth-first preorder traversal of an expression?
I would now like to ask: how to ...
- 270k