adjacency-list

问题 Details: I have a multimap implementation that represents the adjacency list for the subset of a graph. I need to find a path through this subset of the graph, which is actually all the possible paths from a start node F to an end node G , acquired by running a breadth first search on the full graph. Implementation Ideas: The BFS quits once G is found, so you end up with G only in the values of the multimap. My idea is that if you start at the value G , get G 's "key" (let's call it H ), if H

问题 This is my third time for creating a graph using adjacency list in c++. It's important to use OOP. I feel like the answer to this problem is really simple, but I can't manage to fix and improve my code. There is it: #include <iostream> #include <algorithm> #include <fstream> #include <vector> using namespace std; struct Edge { int begin; int end; }; class Graph { private: int numOfNodes; vector<vector<int>> baseVec; public: Graph(int numOfNodes) { //baseVec->resize(numOfNodes, vector<int>

问题 I'm trying to build a flattened array that preserves metadata from a pretty tricky array coming from a view in my CodeIgniter project. That metadata is things like an identifier, depth, and parent node. The data is from a query builder JavaScript library that allows a user to generate rules that will be used in business logic. I need to persist this data, and the model I've gone with to represent the tree-like nature of these rules is an adjacency list. Here's what I have, and it does work

问题 I am constructing an adjacency list based on intensity difference of the pixels in an image. The code snippet in Matlab is as follows: m=1; len = size(cur_label, 1); for j=1:len for k=1:len if(k~=j) % avoiding diagonal elements intensity_diff = abs(indx_intensity(j)-indx_intensity(k)); %intensity defference of two pixels. if intensity_diff<=10 % difference thresholded by 10 adj_list(m, 1) = j; % storing the vertices of the edge adj_list(m, 2) = k; m = m+1; end end end end y = sparse(adj_list(

问题 I am constructing an adjacency list based on intensity difference of the pixels in an image. The code snippet in Matlab is as follows: m=1; len = size(cur_label, 1); for j=1:len for k=1:len if(k~=j) % avoiding diagonal elements intensity_diff = abs(indx_intensity(j)-indx_intensity(k)); %intensity defference of two pixels. if intensity_diff<=10 % difference thresholded by 10 adj_list(m, 1) = j; % storing the vertices of the edge adj_list(m, 2) = k; m = m+1; end end end end y = sparse(adj_list(

问题 I need to change a data frame with named column and rows (NxN dimension) into an edge list. For example the matrix in the data frame is: C1 C2 C3 C4 Ane 0 1 31 0 Jol 4 14 2 0 Ruf 3 3 11 6 Rei 1 7 0 0 I want to change this to a list (like an edge list): Ane-C1 0 Ane-C2 1 Ane-C3 31 Ane-C4 0 Jol-C1 4 Jol-C2 14 Jol-C3 2 Jol-C4 0 Ruf-C1 3 Ruf-C2 3 Ruf-C3 11 Ruf-C4 6 Rei-C1 1 Rei-C2 7 Rei-C3 0 Rei-C4 0 The other threads that I found seems to have only column names/ the data frame is not containing

问题 I have an adjacency list and I am trying to make it into and adjacency matrix or edge list. This is in order to conduct network analysis on the network built from the adjacency matrix or edge list. I am using R. An example of adjacency list is as follows (each row has different amount of entries, and the empty entries are NA): [17,50,90,NA,NA; 80,67,NA,NA,NA; 33,31,32, NA,NA; 33,31,32,NA,NA; 354,56,87,97,32; ....] I tried using R: Adjacency list to Adjacency matrix but this only works if my

问题 Can someone please tell me what kind of adjacency list i have to make to build a graph with appropriate nodes and links? I have to make a tree structure to define ajdacency list? Or is there another way? Not interested in matrix now, thank you. can i for example make an arraylist with other arralists inside every position to the other nodes of the edges to have like: nodes {a,b,c}, connection {{a-c},{b,c}} so i have and arraylist or my adjacency list [a[c],b[c],c[a,b]] 回答1: An adjacency list

问题 I was wondering how (if possible) I can go about making an adjacency list representation of a (mutable) graph via HashMap[Int, Vector[Int]] . HashMap would be mutable of course. Currently I have it set as HashMap[Int, ArrayBuffer[Int]] , but the fact that I can change each cell in the ArrayBuffer makes me uncomfortable, even though I'm fairly certain I'm not doing that. I would use a ListBuffer[Int] but I would like fast random access to neighbors due to my need to do fast random walks on the

问题 I was looking for different Data structures for representing Graph and I came accross Nvidia CUDA Toolkit and found out new way to represent graph with the help of source_indices, destination_offsets. Fascinated by this innovative representation of graph, I searched out for other ways of representing Graphs. But not found anything new. I was wondering if there was any other way to represent Graph other than Adjacency Matrix or Lists... 回答1: I was wondering if there was any other way to