c++,boost,graph,edges,neighbours

1. don't work on a copy bool edgesneighbors(Graph g, edge_iter ep1, edge_iter ep2) This takes g by value, making a copy. Of course, ep1 and ep2 are not valid iterators into the copy Take it by reference: bool edgesneighbors(Graph const& g, edge_iter ep1, edge_iter ep2) { 2. don't use the...

matlab,multidimensional-array,neighbours

Have you considered using convn? msk = [0 1 0; 1 0 1; 0 1 0]; msk4d = permute( msk, [3 1 2 4] ); % make it 1-3-3-1 mask neighbors_idx = find( convn( A, msk4d, 'same' ) > 0 ); You might find conndef useful for defining the basic...

javascript,arrays,find,element,neighbours

You could run a loop of the array and then check if it can have the left or right neighbour or not, if it has get it and if it doesn't leave that neigbour. For example if the loop is the first then there would be no left neighbor in...

The method for solving this issue is refered as Connected Component Labelling A similar question was asked once before from which i have my solution: // matrix dimensions var row_count = 20; var col_count = 20; var numOfTeams = 2; // the input matrix var m = []; // the...

Here's another way, based on your proposed solution but using sequence expressions: let getNeighbours (x,y) (matrix: 'a [,]) = let lower n = max 0 (n - 1) let upper n = min (matrix.GetUpperBound(0)) (n + 1) seq { for i = lower x to upper x do for j...

algorithm,matrix,nearest-neighbor,neighbours

If the end goal is to fill the board, you could just choose for each space on the matrix which type goes on it (the choice is random). To add an option of an empty space, add a fifth option of NO_TYPE. If the number of appearances is known, try...