adjacency-matrix

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 I'm having a hard time figuring out how to create an adjacency matrix from an input file. The input file is supposed to represent a directed, weighted graph of nodes. The purpose is to create a program that can do a iterative depth first search, but I'm really stuck on the data input part of the assignment. The input text file would supposedly look like the following: each node is represented by two lines of text. For example the on the very top line, the first 'S' is the name of the node,

问题 I want to graph the structure of a network (a power grid) in MATLAB. I have a list containing to-from nodes for each branch. I don't have coordinates for the nodes, and the system topology changes for every simulation. I also need to be able to assign different colors to various lines / nodes, to visualize voltage issues or overloads etc, similar to what I've done using biograph (code below). The BIOGRAPH function is almost perfect. The drawback is that the lines always go out the "bottom" of

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

问题 Assuming that I have the following matrix/array: array([[0, 0, 1, 1, 1], [0, 0, 1, 0, 1], [1, 1, 0, 1, 1], [1, 0, 1, 0, 0], [1, 1, 1, 0, 0]]) and I want to apply the following permutation: 1 -> 5 2 -> 4 the result should be in the end: array([[1, 1, 1, 0, 0], [1, 0, 1, 0, 0], [1, 1, 0, 1, 1], [0, 0, 1, 0, 1], [0, 0, 1, 1, 1]]) Now, an incredibly naive (and memory costly) way of doing so might be: a2 = deepcopy(a1) a2[0,:] = a1[4,:] a2[4,:] = a1[0,:] a = deepcopy(a2) a2[:,0] = a[:,4] a2[:,4] =

问题 i have an adjacency matrix of graph graph n 1 2 3 4 5 6 7 8 9 1 0 1 1 1 0 0 0 0 0 2 1 0 1 0 0 0 0 0 0 3 1 1 0 1 0 0 0 0 0 4 1 0 1 0 1 1 0 0 0 5 0 0 0 1 0 1 1 1 0 6 0 0 0 1 1 0 1 1 0 7 0 0 0 0 1 1 0 1 1 8 0 0 0 0 1 1 1 0 0 9 0 0 0 0 0 0 1 0 0 how to convert it to geodesic discance matrix using python? my goal is to make it like this : n 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 2 3 3 4 2 1 0 1 2 3 3 4 4 5 3 1 1 0 1 2 2 3 3 4 4 1 2 1 0 1 1 2 2 3 5 2 3 2 1 0 1 1 1 2 6 2 3 2 1 1 0 1 1 2 7 3 4 3 2 1 1 0 1 1 8

问题 I am interested in testing some network visualization techniques but before trying those functions I want to build an adjacency matrix (from, to) using the dataframe which is as follows. Id Gender Col_Cold_1 Col_Cold_2 Col_Cold_3 Col_Hot_1 Col_Hot_2 Col_Hot_3 10 F pain sleep NA infection medication walking 14 F Bump NA muscle NA twitching flutter 17 M pain hemoloma Callus infection 18 F muscle pain twitching medication My goal is to create an adjacency matrix as follows 1) All values in

问题 I want to create undirected weighted graph of a given adjacency matrix by reading it from a csv. I can read it from a csv but I don't know how to draw its in graph. can anyone help? This is code for reading file. int main(){ ifstream ip("map.csv"); if(!ip.is_open()) std::cout << "ERROR: File Open" << '\n'; string first; string weight; while(ip.good()){ getline(ip,first); getline(ip,weight); std::cout << "First: "<<first <<'\n'; std::cout << "Weight: "<<weight<< '\n'; std::cout << "-----------

问题 I have an adjacency matrix in matlab. How do I draw its graph? As I have >500 nodes, I cannot use gplot with random (or grid-like) coordinates. 回答1: So assuming you have the bioinformatics toolbox, the biograph function is perfect for what you want to do. Here's what I have done in the past: Suppose from and to are two vectors containing information regarding the to-from nodes in the system. Then you can create your adjacency matrix this way: Sys = sparse(from,to,1,s,s); Adj_mat = tril(Sys +

问题 I have an adjacency matrix in matlab. How do I draw its graph? As I have >500 nodes, I cannot use gplot with random (or grid-like) coordinates. 回答1: So assuming you have the bioinformatics toolbox, the biograph function is perfect for what you want to do. Here's what I have done in the past: Suppose from and to are two vectors containing information regarding the to-from nodes in the system. Then you can create your adjacency matrix this way: Sys = sparse(from,to,1,s,s); Adj_mat = tril(Sys +