jagged-arrays

问题 Suppose I have an N*M*X-dimensional array "data", where N and M are fixed, but X is variable for each entry data[n][m]. (Edit: To clarify, I just used np.array() on the 3D python list which I used for reading in the data, so the numpy array is of dimensions N*M and its entries are variable-length lists) I'd now like to compute the average over the X-dimension, so that I'm left with an N*M-dimensional array. Using np.average/mean with the axis-argument doesn't work, so the way I'm doing it

问题 How do you create an array of arrays in C#? I have read about creating jagged arrays but I'm not sure if thats the best way of going about it. I was wanting to achieve something like this: string[] myArray = {string[] myArray2, string[] myArray3} Then I can access it like myArray.myArray2[0]; I know that code won't work but just as an example to explain what I mean. Thanks. 回答1: Simple example of array of arrays or multidimensional array is as follows: int[] a1 = { 1, 2, 3 }; int[] a2 = { 4,

问题 Is it possible to pass a jagged array to a web API method? For example: public IEnumerable<Object> Get([FromUri]int[][] jaggedArray) How would I be able to to pass a value for jaggedArray in my web request? The parameter doesn't necessarily have to be [FromUri] 回答1: I managed to figure it out. The parameter can be passed using the following format: http://www.example.com/api/endPoint?jaggedArray[0][]=406&jaggedArray[0][]=404&jaggedArray[1][]=405&jaggedArray[1][]=407 This causes a jagged array

问题 I'm faced with a challenge in two parts. I've been requested to replace 3 columns in a Matrix that aggregates on Name in the row group. The 3 columns are outside of the Column group. Challenge 1 - Matrices want to summarize the Data pane. There seems to be no way to show the Raw Data (and then hide it, in order for these rows during runtime to populate an array). Challenge 2 - I need to calculate the median BY name. This means either, during runtime, I need to calculate one median for each

问题 I have having problem to binding jagged array in knockout-js. I have search a lot but could not found any thing. Let make a simple example, <div data-bind="foreach: items"> <div data-bind="style: { textAlign: align, backgroundColor: bgColor, fontFamily: fontFamily, fontSize: size, color: color }, text: title"></div> </div> and here is the my array, var items = [{ title: 'A', align: 'right', fontFamily: 'helvetica', color: '#777777', bgColor: '#ffffff' }, { title: 'A', align: 'right', size:

问题 Say I have a property like this: public int[] MyProperty { get; set; } The calling code is free to change the values of the array, but also to replace the array itself . This can easily be prevented by hiding the setter, like so: public int[] MyProperty { get; private set; } This allows the calling code to change the values, but it can't change the array to a different one, or change the size. This pattern works with multidimensional arrays, but not jagged arrays. If I have this: public int[]

问题 From: http://msdn.microsoft.com/en-us/library/2s05feca.aspx Notice that you cannot omit the new operator from the elements initialization because there is no default initialization for the elements: int[][] jaggedArray3 = { new int[] {1,3,5,7,9}, new int[] {0,2,4,6}, new int[] {11,22} }; What does it mean? Why is it ok to omit new in: int[] arrSimp = { 1, 2, 3 }; int[,] arrMult = { { 1, 1 }, { 2, 2 }, { 3, 3 } }; but not possible in: int[][,] arrJagg = {new int[,] { { 1, 1} }, new int[,] { {

问题 In the Apress book "Illustrated C# 2008", pg. 343 notes: "One-dimensional arrays have specific instructions in the CIL that allow them to be optimized for performance. Rectangular arrays do not have these instructions...Because of this, it can sometimes be more efficient to use jagged arrays..." Does anyone know how these performance optimizations are implemented? 来源： https://stackoverflow.com/questions/1986989/how-does-c-sharp-3-0-jagged-array-performance-optimization-vs-rectangular-array

问题 What I have Let's take an example of this code which works. Sub Sample() Dim ws As Worksheet Set ws = ThisWorkbook.Sheets("Sheet1") ws.Columns(1).TextToColumns _ Destination:=Range("A1"), _ DataType:=xlFixedWidth, _ FieldInfo:=Array( _ Array(0, 1), Array(60, 1), Array(120, 1), Array(180, 1), _ Array(240, 1), Array(300, 1), Array(360, 1), Array(420, 1) _ ), _ TrailingMinusNumbers:=True End Sub What I want In a small set of data, the above code works. But what if I want to go up to say Array

问题 Does an array stored inside a jagged array need to be of the same type? for example can I store an array of ints and an array of strings in one jagged array? 回答1: Why not use an array of objects ? here is an example- var jaggedArray = new object[3]; jaggedArray[0] = new[] { 1, 2, 3 }; jaggedArray[1] = new[] { "str", "onemore" }; jaggedArray[2] = new[] { new { prop = 14 }, new { prop = 12 }, new { prop = 1 } }; Console.Write(jaggedArray[0].ToString()); Copy & paste this in a console