First input is T, a triplet list of indices. Second input is i, a single index (positive integer). The goal of this function is to find and return the indices of the rows in the list which contain this particular index. Output format is indifferently a column or a row vector.
For example if inputs are
T = [1 2 3;...
1 3 4;...
1 4 2;...
2 3 4]
and
i = 2
the output is the vector
row_idx = [1 3 4]
since 2 is contained in rows number 1, 3, and 4 of T. If the index is not in the list, the function must of course return the empty set. Each index is at most contained once per row / triplet.
See also
Solution Stats
Problem Comments
1 Comment
Solution Comments
Show comments
Loading...
Problem Recent Solvers43
Suggested Problems
-
Which values occur exactly three times?
5239 Solvers
-
Renaming a field in a structure array
1578 Solvers
-
Given a square and a circle, please decide whether the square covers more area.
1729 Solvers
-
2168 Solvers
-
42 Solvers
More from this Author42
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Info : T is actually a triangulation -list of triangles-, in which each index corresponding to the row index of a vertex in another list -a vertices list-, it is a widely used technique used to store and write triangular meshes in mesh processing. Here below the example is a tetrahedron -4 facets-.