multidimensional-array

问题 I am currently using xarray to make probability maps. I want to use a statistical assessment like a “counting” exercise. Meaning, for all data points in NEU count how many times both variables jointly exceed their threshold. That means 1th percentile of the precipitation data and 99th percentile of temperature data. Then the probability (P) of join occurrence is simply the number of joint exceedances divided by the number of data points in your dataset. <xarray.Dataset> Dimensions: (latitude:

问题 I have 2 arrays x and y with shapes (2, 3, 3) , respectively, (3, 3) . I want to compute the dot product z with shape (2, 3) in the following way: x = np.array([[[a111, a121, a131], [a211, a221, a231], [a311, a321, a331]], [[a112, a122, a132], [a212, a222, a232], [a312, a322, a332]]]) y = np.array([[b11, b12, b13], [b21, b22, b23], [b31, b32, b33]]) z = np.array([[a111*b11+a121*b12+a131*b13, a211*b21+a221*b22+a231*b23, a311*b31+a321*b32+a331*b33], [a112*b11+a122*b12+a132*b13, a212*b21+a222

问题 Given a multidimensional array like this: var arr = [ "apple", ["banana", "strawberry","dsffsd", "apple"], "banana", ["sdfdsf","apple",["apple",["nonapple", "apple",["apple"]]]] ,"apple"]; the challenge was to write a function that keeps the array and an item as arguments and return how many times that item appears in the array. My first solution did the trick: function countItems(arr, item, sumarr = []) { // sumarr = array to store items matched for (let i = 0; i < arr.length; i++ ){ //

问题 I have a script that runs through football fixtures, each day it will work out the teams played, wins, draws, losses, gd and points. At the end of each day it will upload the table to the database, so that I have a different table for each day (I have my reasons for it lol) Problem is here is an example my code that creates the array. if (array_key_exists(strval($firstDate), $matches)) { // Matches Exist foreach($matches[$firstDate] as $matchList) { $homeName = $matchList['homeTeamName'];

问题 I have array that I need to sort by another array form 2 fields zip code and approve I am able to sort it by zip code but unable to do it with approved field so for eg I need to sort by 60007,60001,60003,60002 (as per sortlike order) all zip code from 60007 and approved should come first so $sortLike=array(60007,60001,60003,60002); $array1= array( array ('ID' => 138,'zip_code' => 60007,'approved' => 1), array('ID' => 103,'zip_code' => 60007,'approved' => 0), array('ID' => 114,'zip_code' =>

问题 I'm trying to write a method for 'transpose' a two-dimensional array of integers, in which the rows and columns of the original matrix are exchanged. However, I have no idea how I can realize this. How do I write out this method? public class Matrix { private int[][] numbers; public Matrix(int rows, int colums) { if (rows < 1) rows = 1; else rows = rows; if (colums < 1) colums = 1; else colums = colums; numbers = new int[rows][colums]; } public final void setNumbers(int[][] numbers) { this

问题 I am trying to de-reference the 2D array inside the function islandPerimeter . But I cannot understand why I am getting segfault for this. Can someone point out what exactly I am doing wrong? update: So this was a part of a problem from leetcode I was trying to solve.I now understand it is not 2D array but a pointer. I am still confused over the int**. can someone explain it? #include <stdio.h> int islandPerimeter(int** grid, int gridSize, int gridColSize) { int perimeter=0,points=4,i=0; for

问题 I need some help filling a 2D array using a nested for loop. The desired output is this... 20.0 19.0 18.0 17.0 16.0 15.0 14.0 13.0 12.0 11.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0 19.0 18.0 17.0 16.0 15.0 14.0 13.0 12.0 11.0 10.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 18.0 17.0 16.0 15.0 14.0 13.0 12.0 11.0 10.0 9.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 17.0 16.0 15.0 14.0 13.0 12.0 11.0 10.0 9.0 8.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0

问题 I'm new to C# and looking at arrays. Given: int[][] myJagArray = new int[5][]; Why does the following print the types of j (System.Int32[]), and not each j's contents? foreach (int[] j in myJagArray) { Console.WriteLine("j : {0}",j); } 回答1: Because Array.ToString() does not return the contents of the array, it returns the type name, and Console.WriteLine implicitly calls ToString() on each object you send it as a parameter. This has no regard to the fact that the array is part of a multi

问题 I'm new to C# and looking at arrays. Given: int[][] myJagArray = new int[5][]; Why does the following print the types of j (System.Int32[]), and not each j's contents? foreach (int[] j in myJagArray) { Console.WriteLine("j : {0}",j); } 回答1: Because Array.ToString() does not return the contents of the array, it returns the type name, and Console.WriteLine implicitly calls ToString() on each object you send it as a parameter. This has no regard to the fact that the array is part of a multi