xarray

/// Common library dynamic array template class/*** General Library version 4.0 * A dynamic array template class is defined here. This time, the previous XDyanmicArray and XArray are merged into an XArray.* In addition, the array element initialization operation is added to 0. At the same time, the default constructor and analysis function of the array element are executed.* Similarly, this dynamic array is

; } Private function GetTileXY (nZoom: int, mp: Point): Point { Var wx: Number; Var wy: Number; Var cx: Number; Var cy: Number; Var xArray: Array = new Array (); Var yArray: Array = new Array (); Cx = 0; Cy =-90; Wx = wy= 180; Var I: int = 0; Var x: int = 0; Var y: int = 0; For (I = 0; I { If (mp. x> = cx) { If (mp. y> = cy) { XArray. push (1 ); YArray. push (0 ); Cx + = wx/2; Cy + = wy/2; } Else {

Copy CodeThe code is as follows: function Getderivativebyformulaandxdata ($formula, $x _data) { $xArray = Explode ("+", $formula); $Derivative = 0; foreach ($xArray as $x _record) { $tmpArray = Explode ("x^", $x _record); if (count ($tmpArray) = = 2) { $coefficient = $tmpArray [0]== ""? 1: $tmpArray [0]; $exp = $tmpArray [1]; } constant else { $coefficient = $tmpArray [0]; $exp = 0; } $Derivative + = $coef

First, generating arrays and matrices1, Linspace (start,end,number), generates number between start and end number>>> x = Linspace (0)>>>01 23456789.])2, Logspace (start,end,number) produces numbers, between 10**start,10**end, the equivalent of an exponential function, the x-axis is divided into number of numbers, to calculate the exponent.Same as 10**linspace (start,end,number) effect3, Arange (l,u, s)4,Meshgrid ()>>> x = Arange (5)>>> y = arange (3)>>> x, y =Meshgrid (x, y)>>>

Copy Code code as follows: function Getderivativebyformulaandxdata ($formula, $x _data) { $xArray = Explode ("+", $formula); $Derivative = 0; foreach ($xArray as $x _record) { $tmpArray = Explode ("x^", $x _record); if (count ($tmpArray) = 2) { $coefficient = $tmpArray [0]== "" 1: $tmpArray [0]; $exp = $tmpArray [1]; } constant else { $coefficient = $tmpArray [0]; $exp = 0; } $Derivative

].textbar.itemname.text = namearray[item-1];//Read the title of the animation this["B" +item].textbar.itemname.settextformat (FNF);//Set Caption Text property to "FNF", FNF is defined below this["B" +item].textbar.itemname._visible = false;//Set Title not visible } Mcllistener.onloadinit = function () {//Set listener method to load complete if (itemitem++;//Current one animation load complete, counter plus one, ATTACHFLV ()//Continue Loading } }; var FNF = new TextFormat ();//define Pro

instanceof method and the constructor attribute can both be used to determine whether it is an array, but there are also external columns, for example, when using an array on the page during cross-frame iframe, it will fail, because in Different frames iframe, the created array will not share its prototype attribute with each other; the following code can be verified after testing ~ Var iframe = document. createElement ('iframe'); document. body. appendChild (iframe);

Example of how to create a symmetric matrix using Python [numpy module] And pythonnumpy This example describes how to create a symmetric matrix in Python. We will share this with you for your reference. The details are as follows: The symmetric (Real Symmetric) matrix is also: Step 1: Create a square matrix >>> import numpy as np>>> X = np.random.rand(5**2).reshape(5, 5)>>> Xarray([[ 0.26984148, 0.25408384, 0.12428487, 0.0194565 , 0.91287708], [ 0.31

column.We can now see that the instanceof method and the constructor attribute can both be used to determine whether it is an array, but there are also external columns, for example, when using an array on the page during cross-frame iframe, it will fail, because in Different frames iframe, the created array will not share its prototype attribute with each other; the following code can be verified after testing ~ Var iframe = document. createElement ('iframe'); document. body. appendChild (ifr

The code is as follows: function Getderivativebyformulaandxdata ($formula, $x _data) {$xArray = Explode ("+", $formula);$Derivative = 0;foreach ($xArray as $x _record) {$tmpArray = Explode ("x^", $x _record);if (count ($tmpArray) = = 2) {$coefficient = $tmpArray [0]== ""? 1: $tmpArray [0];$exp = $tmpArray [1];}constantelse {$coefficient = $tmpArray [0];$exp = 0;}$Derivative + = $coefficient * $exp *pow ($x

The code for the function code written by PHP to evaluate the polynomial derivative is as follows: Function getDerivativeByFormulaAndXDATA ($ formula, $ x_data ){$ XArray = explode ("+", $ formula );$ Derivative = 0;Foreach ($ xArray as $ x_record ){$ TmpArray = explode ("x ^", $ x_record );If (count ($ tmpArray) = 2 ){$ Coefficient = $ tmpArray [0] = ""? 1: $ tmpArray [0];$ Exp = $ tmpArray [1];}// Cons

instanceof method and the constructor attribute can both be used to determine whether it is an array, but there are also external columns, for example, when using an array on the page during cross-frame iframe, it will fail, because in Different frames iframe, the created array will not share its prototype attribute with each other; the following code can be verified after testing ~ Var iframe = document. createElement ('iframe'); document. body. appendChild (iframe);

determine whether it is an array, but there are also external columns, for example, when using an array on the page during cross-frame iframe, it will fail, because in Different frames iframe, the created array will not share its prototype attribute with each other; the following code can be verified after testing ~ Var iframe = document. createElement ('iframe'); document. body. appendChild (iframe); xArray = window. frames [window. frames. length-1

Copy codeThe Code is as follows: Function getDerivativeByFormulaAndXDATA ($ formula, $ x_data ){ $ XArray = explode ("+", $ formula ); $ Derivative = 0; Foreach ($ xArray as $ x_record ){ $ TmpArray = explode ("x ^", $ x_record ); If (count ($ tmpArray) = 2 ){ $ Coefficient = $ tmpArray [0] = ""? 1: $ tmpArray [0]; $ Exp = $ tmpArray [1]; } // Constant Else { $ Coefficient = $ tmpArray [0]; $ Exp = 0; } $ D

PHP code used to calculate the polynomial derivative. For more information, see The code is as follows: Function getDerivativeByFormulaAndXDATA ($ formula, $ x_data ){$ XArray = explode ("+", $ formula );$ Derivative = 0;Foreach ($ xArray as $ x_record ){$ TmpArray = explode ("x ^", $ x_record );If (count ($ tmpArray) = 2 ){$ Coefficient = $ tmpArray [0] = ""? 1: $ tmpArray [0];$ Exp = $ tmpArray [1];}

as when using an array in a page across a frame iframe, Because in the different frame iframe, the created array does not share its prototype property with each other, the following code test can be validated ~ var iframe = document.createelement (' iframe '); Document.body.appendChild (IFRAME); Xarray = Window.frames[window.frames.length-1]. Array; var arr = new Xarray ("1", "2", "3", "4", "5"

dimension of tensor is often called an axis axis, not dimension).Scalars (0D tensors) scalar--0 dimension tensorA tensor tensor that contains only one number is called a scalar scaler (or 0D tensor). In NumPy, a number of a float32, or float64 type is a scalar. The dimensions of the tensor can be viewed through the Ndim property of the tensor, the dimensions of the tensor are 0, and the dimensions are also known as rank rank.>>> import numpy as np>>> x = np.array(12)>>>

block after the #ifdef is compiled, and the block ends with #endif. For example: #ifdef Mintarray int xarray[20]; #endif/* Mintarray */ #endif后面的注释语句并不是必须的/* Mintarray * *, but it's a good way to do it, so you know which macro you defined is the end position. and #ifdef the idea of the opposite is #ifndef. #if语句 #if语句会计算它后面的表达式, and checks the result of the expression, if the result is true (true), the subsequent statement is compiled, and if Fa

#-*-coding:utf-8-*-# ---------------------------------------------------------------------------#adaboost.py#Created on:2014-06-12 09:49:56.00000#Description:# ---------------------------------------------------------------------------ImportSYSImportMathImportNumPy as Npbreakvalues= (2.5, 5.5, 8.5) X= Np.array ([0,1,2,3,4,5,6,7,8,9]) Y= Np.array ([1,1,1,-1,-1,-1,1,1,1,-1]) W1= Np.array ([0.1,0.1,0.1,0.1,0.1,0.1,0.1,0.1,0.1,0.1]) defClassifier25 (x):ifX : return1Else: return-1def

Numpy usage tips: array filtering instance code, numpy usage tips This article focuses on the array filtering related to numpy usage techniques, as detailed below. When Boolean array B is used as the subscript to access elements in array x, all elements in array x corresponding to the subscript True in array B are collected. The array obtained using a Boolean array as the subscript does not share data space with the original array. Note that this method only corresponds to a Boolean array (array