edges

问题 I want to copy edges with their vertices and properties from dataG.front(), and add it to testg , I tried what I found in "Accessing bundled properties" section http://www.boost.org/doc/libs/1_57_0/libs/graph/doc/bundles.html but it isn't working for me. PS: dataG is a vector of graphs. typedef std::pair<edge_iter, edge_iter> edge_pair; Graph testg; if (!dataG.empty()) { auto const& gr = dataG.front(); for (edge_pair ep = edges(gr); ep.first != ep.second; ++ep.first) //ep edge number { auto

问题 I've got a data model that I want to roughly model after the article posted in this Graphgist. I'm curious as to the performance that I can expect on the WHERE clause in the case that a given set of 2 nodes has a large number of relationships between them with 'from' and 'to' parameters defined on each edge. When you do a match query like this where you have let's say 100 SELLS relationships, how does Neo4J handle performance of filtering down the edges to just the one(s) that matter based on

问题 I have retrieved many tweets from twitter using the r package twitteR. After I've done this successfully, my goal is to create edges for a network analysis based on the mentions in those tweets. For this purpose I used the following code to get twitter usernames which were mentioned in a tweet: tweets <- read.csv(file="tweets.csv") tweets$mentions <- str_extract_all(tweets$text, "@\\w+") There are tweets in which more than one username is mentioned for example "usernameA, usernameB and

问题 Using Gephi, I'd like to visualize how members of different organizations are related. My source material basically consists of a list of organizations and their members: Organization 1 Individual 1 Individual 2 Individual 3 Individual 4 Organization 2 Individual 5 Individual 1 Individual 6 Individual 7 Sometimes an individual shows up in different organizations (i.e. Individual 1 in this example). Questions: 1) How should I convert this information into edges so that the relationship between

问题 My nodes have a list of attibutes that is seperated by commas, i wanted networkx to compare them and if they match, create an edge between the nodes. That is as for as i got, but it's not working, any ideas on how to improve my approach? for node in G.nodes(): while len(G.node[n]['attr']) = (G.node[n+1]['attr']): # compare attributes? valid_target_found = False while not valid_target_found: target = random.randint(0,N-1) # pick a random node if (not target in G.node[n]['attr']) and len(G.node

问题 I'm looking at drawing the edges of a mesh like on the following picture: I tried to use THREE.EdgesHelper however it only groups the triangles that are in the same plane and therefore it looks like the wireframe on curved areas which I want to avoid. Ideally it would be some sort of helper that I could display/hide/change colour. I'm not exactly sure about what to look at for a starting point and your help would be much appreciated. Thank you! 来源： https://stackoverflow.com/questions/24566247

问题 I need to convert a shapefile (ESRI) of roads type SpatialLinesDataFrame in a neural network in R. I do not know how to remove nodes or vertices of the shape. Determine the length of each edge between nodes. With these parameters I can create the network using the packet (network). Summary: Input shapefile for the igraph network in R. Thank you from the South of Chile. 回答1: Here is a try -- library(rgdal) library(igraph) dsn <- system.file("vectors", package = "rgdal")[1] sl <- readOGR(dsn

问题 I created a graph in yEd and I want to check if an edge has an attribute. For example some edges have a label but some dont. When I try to do this I get an an error: for n, nbrs in G.adjacency_iter(): for nbr,eattr in nbrs.items(): evpn = eattr['vpn'] elabel = eattr['label'] #error is here if evpn != "No": nlabel = G[n].get("label") platform = G[n].get("platform") if G[nbr].get("platform") == platform: g_vpn.add_nodes_from([n,nbr], label, platform) # I dont know if this way #to set attributes

问题 I have the edges and i want to build a tree with it. The problem is that i can construct my tree structure only when edges are in specific order. Example of orders: (vertex, parent_vertex) good: bad: (0, ) <-top (3, 2) (1, 0) (1, 0) (2, 1) (3, 2) (3, 2) (0, ) <-top I iterate throw the edges and for current vertex trying to find it's parent in created tree, then i construct the node and insert it. result tree: 0 - 1 - 2 - 3 So there is always must exist a parent in the tree for the new added

问题 I vaguely remember seeing something in OpenGL (not ES, which was still at v1.0 on the iPhone when I came across this, which is why I never used it) that let me specify which edges of my polygons were considered outlines vs those that made up the interior of faces. As such, this isn't the same as the outline of the entire model (which I know how to do), but rather the outline of a planar face with all its tris basically blended into one poly. For instance, in a cube made up of tri's, each face