nodes

问题 In sci-kit learn, it's possible to access the entire tree structure, that is, each node of the tree. This allows to explore the attributes used at each split of the tree and which values are used for the test The binary tree structure has 5 nodes and has the following tree structure: node=0 test node: go to node 1 if X[:, 3] <= 0.800000011920929 else to node 2. node=1 leaf node. node=2 test node: go to node 3 if X[:, 2] <= 4.950000047683716 else to node 4. node=3 leaf node. node=4 leaf node.

问题 In my game, when the game begins, some nodes are already in contact but I don't find how to detect these contacts. I only succeed to detect contacts that happen when nodes are moving and getting in contact during the game using the function didBeginContact. Anyone has an idea please how to detect these contacts? Here is my didBeginContact if needed: func didBeginContact(contact: SKPhysicsContact) { var firstBody: SKPhysicsBody var secondBody: SKPhysicsBody if contact.bodyA.categoryBitMask ==

问题 I need help with my add method in java. It works with DoublyLinked List. I am implementing a cyclic DoublyLinkedList data structure. Like a singly linked list, nodes in a doubly linked list have a reference to the next node, but unlike a singly linked list, nodes in a doubly linked list also have a reference to the previous node. Additionally, because the list is "cyclic", the "next" reference in the last node in the list points to the first node in the list, and the "prev" reference in the

问题 When I run this code, i get the error: "Field 'children' has incomplete type 'Node[0]'". I'm coding in C++ and I want to create a Node class which creates in itself two other Node objects and so on, until it reaches the maxDepth. The full error I get: 18:24:16 **** Incremental Build of configuration Debug for project Tests **** make all Building file: ../main.cpp Invoking: Cross G++ Compiler g++ -std=c++0x -O3 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"main.d" -MT"main.d" -o "main.o" "..

问题 I want to display the searched node and its parents only. I wanted to exclude the unrelated nodes. My code only does search and display but it does not filter out the other nodes. They are still in the display. What approach can be done to do this? You can get what I mean by going the Eclipse's Run Configurations' Search function. It only displays what is searched and it's "parents". Thank you so much for your input . I am trapped here for days . =( Here is my code: import java.awt

问题 As an addition to my orginal post Group/merge childs of same nodes in xml/xslt I ran into the problem of having that structure repeated multiple times for different nodes (wihtin nodes higher in the hierarchy) e.g., <Collection> <Questionnaire Name="Preferences" VersionID="3QW"> <Subject ID="2355"> <EventData Name="First Part"> <FormData Name="Past"> <GroupData ID="xxx" Key="4" Temp="yyy"> <ItemData ID="zzz" Value="3"/> </GroupData> <GroupData ID="xxx" Key="4" Temp="yyy"> <ItemData ID="qqq"

问题 void SinglyLinkedList::removeBike(int c) { Node* current = head; for(int i = 0; i < c; i++){ // traverse to desired node current = current -> next; } if(current -> next != NULL && current -> prev != NULL){ current -> prev -> next = current -> next; current -> next -> prev = current -> prev; delete current; //delete node } else if(current -> next == NULL){ current -> prev -> next = current; delete current; } else if(current -> prev == NULL){ current -> next -> prev = current; delete current; }

问题 I have a XML like this: <ITEM> <RACES> <TAB> <NUMBER>1</NUMBER> <A></A> <B></B> </TAB> <TAB> <NUMBER>2</NUMBER> <A></A> <B></B> </TAB> </RACES> </ITEM> is it possible to retrieve as XmlNodeList all the As and Bs nodes that belong to only TAB with NUMBER 1? I use the following codes, but it gives me of course 2 nodes. I want only 1 node : XmlNodeList xnList = xml.SelectNodes("/ITEM/RACES/TAB/A"); 回答1: You can do xmlDocument.SelectNodes(expression) where if you need both nodes A & B expression

问题 I'm trying to program a trie in C to read a file and add all the words in the file to the trie, and it works well, but I can't get it to accept apostrophes: typedef struct node { bool wordBool; struct node* next[27]; // 26 letters and one space for the apostrophe } node; node* base; int numWords = 0; bool load(const char* dictionary) { FILE* dictionaryf = fopen(dictionary, "r"); // the file to read base = malloc(sizeof(node)); node variable; node *currNode = &variable; int n = 0; while((n =

问题 I'm trying to display() my binary tree with what's inside already but for some reason it's not working. I'm getting nothing as an output. Maybe my logic for the methods is off? I'm not quite sure. Here's my Node.java file: (content missing) Here's my BinaryTree.java file: public class BinaryTree { public static Node root; public BinaryTree() { this.root = null; } public void insert(Node n, Student s) { if(n != null) { while(true) { if(s.getLastName().compareTo(root.data) < 0) { insert(n.left