我试图比较使用和不使用ILU预处理器的GMRES求解器.它运行并在未应用预处理器时提供正确的答案(x=[1,1,1]).但是,我似乎无法找到正确应用预处理器的方法.
如何让这段代码与ILU预处理器一起运行？
import numpy as np
import scipy.sparse.linalg as spla
A = np.array([[ 0.4445, 0.4444, -0.2222],
[ 0.4444, 0.4445, -0.2222],
[-0.2222, -0.2222, 0.1112]])
b = np.array([[ 0.6667],
[ 0.6667],
[-0.3332]])
M2 = spla.spilu(A)
x = spla.gmres(A,b,M=M2)
print x
我尝试过以不同的方式来显示功能的标签，但没有成功。
我定义了一个功能：
var pointFeature = new ol.Feature(wha, {label: "Airport"});
如何让“机场”一词显示在要素的位置（纬度/经度）处？
我是 OpenLayers 的新手，所以如果答案非常简单，我深表歉意。这是完整的代码：
<!DOCTYPE html>
<html>
<head>
<title>IGC example</title>
<script src="https://code.jquery.com/jquery-1.11.2.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="http://openlayers.org/en/v3.10.1/css/ol.css" type="text/css">
<script src="http://openlayers.org/en/v3.10.1/build/ol.js"></script>
</head>
<body><div class="ALL">
<div class="container-fluid">
<div class="row-fluid">
<div class="span12">
<div id="map" class="map">
</div>
<input id="time" type="range" value="0" steps="1" />
<div class="span4 offset4 pull-right">
<div id="info" class="alert alert-success">
</div>
</div>
</div>
</div>
</div></div>
<script>
// Geometries
var wha = new ol.geom.Circle(ol.proj.transform([-96.1543889, 29.2542778], 'EPSG:4326', 'EPSG:3857'), 400);
var circle = …我有以下代码来呈现一个简单的多维数据集。它具有dat.GUI控件来更改旋转，我也想添加一个颜色转换器。最终，我希望具有更复杂的几何形状，并希望能够更改多个元素的颜色。
$(function(){
var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera(45, window.innerWidth/window.innerHeight, .1, 500);
var renderer = new THREE.WebGLRenderer();
renderer.setClearColor(0xdddddd);
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.shadowMapEnabled = true;
renderer.shadowMapSoft = true;
var axis = new THREE.AxisHelper(10);
scene.add (axis);
var grid = new THREE.GridHelper(50, 5);
var color = new THREE.Color("rgb(255,0,0)");
grid.setColors(color, 0x000000);
scene.add(grid);
var cubeGeometry = new THREE.BoxGeometry(5, 5, 5);
var cubeMaterial = new THREE.MeshLambertMaterial({color:0x80ff});
var cube = new THREE.Mesh(cubeGeometry, cubeMaterial);
var planeGeometry = new THREE.PlaneGeometry(30,30,30);
var planeMaterial = new THREE.MeshLambertMaterial({color:0xffffff});
var plane …