graph

问题 I have a >10k list of (unordered) pairs of numbers. I'd like to classify them into sets of connected pairs either directly or indirectly. I think this corresponds to undirected graph. I'm using python, and tried something like this to represent this structure. In order to know all the numbers connected to i , I can examine whether there is a path from i to j for all j in the list except i . However, with this implementation, the computation time gets too long for the size of list I'm dealing

问题 Is that possible to plot a simple graph using Haskell ? Can any of you show me how to do that ? The graph should contain at lest 3 points 回答1: haskell-chart seems to be good. The wiki contains a list of graphs drawn using that package. 来源： https://stackoverflow.com/questions/20824756/plotting-a-graph-using-haskell

问题 Is that possible to plot a simple graph using Haskell ? Can any of you show me how to do that ? The graph should contain at lest 3 points 回答1: haskell-chart seems to be good. The wiki contains a list of graphs drawn using that package. 来源： https://stackoverflow.com/questions/20824756/plotting-a-graph-using-haskell

问题 In my algorithms class I've been told that a draw back of Adjacency Lists for graph representation is the O(n) look up time for iterating through the array of adjacent nodes corresponding to each node. I implement my adjacency list by using a HashMap that maps nodes to a HashSet of their adjacent nodes, wouldn't that only take O(1) look up time? Is there something I'm missing? 回答1: As you know look up for value using key in HashMap is O(1). However, in adjacency list the value of the HashMap

问题 This question leads on from a previous question I asked yesterday that got me most of the way to what I am after: Rotate transformation on matplotlib axis in subplot I want to create a two by two array of graphs where the bottom-left is a scatter plot and the other three are histograms projecting the x, y, and x-y data from that plot. That final histogram I want to have at a 45 degree angle, and it is the positioning of that plot which I am trying to adjust. Currently, I have this: from

问题 I have done 24 hour measurement and results obtain contains around 1400 entries. Now I want to plot those results in such a way That x axis represent my time and y axis the corresponding value. My x axis should be divided into 24 sections each representing 1 hour. My exact start time is 14:00 and end time is next day 14:00 . For more clarification I am adding a simple version of my data here below And resulting Plot I am getting is this. I look forward to your answers. Thank you. 回答1: If the

问题 There is a m*n Matrix . From one point of the matrix, you can move to one of the eight adjacent points ( up, down, left, right, upper left, lower left, upper right, lower right ) If the point in one direction has been visited, you can continue to move to the next unvisited point in this direction. You cann't visit a point which has been visited, but you can pass through the visited adjacent point to visit other un-visited point. For example, the current point is (5,5): If (5,4) has been

问题 There is a m*n Matrix . From one point of the matrix, you can move to one of the eight adjacent points ( up, down, left, right, upper left, lower left, upper right, lower right ) If the point in one direction has been visited, you can continue to move to the next unvisited point in this direction. You cann't visit a point which has been visited, but you can pass through the visited adjacent point to visit other un-visited point. For example, the current point is (5,5): If (5,4) has been

问题 I'm recently working on constructing social network graphs using networkX. I'm able to visualize and manipulate the graph at small scale. Howerver Im interested in knowing where networkX stores this graph info. This is because, I'm having a large collection of users for whom I need to construct graph and use the graph info for some suggestions. So I would like to know if I could store and access the graph. 回答1: NetworkX stores graph data in Python objects instantiated from one of several

问题 I'm recently working on constructing social network graphs using networkX. I'm able to visualize and manipulate the graph at small scale. Howerver Im interested in knowing where networkX stores this graph info. This is because, I'm having a large collection of users for whom I need to construct graph and use the graph info for some suggestions. So I would like to know if I could store and access the graph. 回答1: NetworkX stores graph data in Python objects instantiated from one of several