[从头学数学] 第127节 数据的收集、整理与描述 小结与复习题

剧情提要：
[机器小伟]在[工程师阿伟]的陪同下进入了筑基初期的修炼，
这次要修炼的目标是[数据的收集、整理与描述 小结与复习题]。

正剧开始：

星历2016年03月08日 14:56:08, 银河系厄尔斯星球*江南行省。
[工程师阿伟]正在和[机器小伟]一起研究[数据的收集、整理与描述 小结与复习]。

<span style="font-size:18px;">//xGlobal, yGlobal是传入自页面的全局地图坐标，不一定需要用上。
function myDraw(xGlobal, yGlobal) {  
	//鞋尺寸
	var config = new PlotConfiguration();      
	config.init();  
	
	config.setPreference();  
	var r = 20;
	//config.setSector(1,1,1,1);  
	//config.graphPaper2D(0, 0, r);
	//config.axis2D(0, 0,180);  

	var stat = new Statistic();        
    var rawdata = [
		35,37,36,35,37,36,37,38,
		36,37,37,35,35,34,34,35,
		35,36,37,36,38,39,37,35,
		36,35,36,37,33,34,40,36,
		35,34,35,36,37,36
	];  

	var data = [];
    var text = [];
	var len = rawdata.length;
	
	//初始化各组频数
	//0-100，隔5一组
	var gap = 1;
	var start = 30;
	var end = 45;
	for (var i = start; i <= end; i+=gap) {
		data.push(0);
		text.push((i).toFixed(0));
	}	
	
	//频数统计
	var group;
	for (var i = 0; i < len; i++) {
		group = Math.floor((rawdata[i]-start)/gap);
		data[group]+=1;
	}
    
    stat.init(data, '鞋号', '人数', 1); 
    stat.histogram(text, 0, 0); 
	
	
}</span>

<span style="font-size:18px;">function myDraw(xGlobal, yGlobal) {  
	//鞋尺寸
	var config = new PlotConfiguration();      
	config.init();  
	
	config.setPreference();  
	var r = 20;
	config.setSector(1,1,1,1);  
	//config.graphPaper2D(0, 0, r);
	//config.axis2D(0, 0,180);  

	var stat = new Statistic();        
    var rawdata = [
		35,37,36,35,37,36,37,38,
		36,37,37,35,35,34,34,35,
		35,36,37,36,38,39,37,35,
		36,35,36,37,33,34,40,36,
		35,34,35,36,37,36
	];  

	var data = [];
    var text = [];
	var len = rawdata.length;
	
	//初始化各组频数
	//0-100，隔5一组
	var gap = 1;
	var start = 30;
	var end = 45;
	for (var i = start; i <= end; i+=gap) {
		data.push(0);
		text.push((i).toFixed(0));
	}	
	
	//频数统计
	var group;
	for (var i = 0; i < len; i++) {
		group = Math.floor((rawdata[i]-start)/gap);
		data[group]+=1;
	}
    
	var data2 = [];
	var text2 = [];
	
	len = data.length;
	for (var i = 0; i<len; i++) {
		if (data[i]>0) {
			data2.push(data[i]);
			text2.push(text[i]);
		}
	}
    
    stat.pieChart(data2, text2); 
	
	
}</span>

<span style="font-size:18px;">function myDraw(xGlobal, yGlobal) {  
	//GDP统计
	var config = new PlotConfiguration();      
	config.init();  
	
	config.setPreference();  
	var r = 20;
	//config.setSector(1,1,1,1);  
	//config.graphPaper2D(0, 0, r);
	//config.axis2D(0, 0,180);  

	var stat = new Statistic();        

	var data = [[184937],[216314],[265810],[314045],[340903],[401202]];
    var text = [];
	
	for (var i = 2005; i < 2011; i++) {
		text.push(i.toFixed(0));
	}
	
	stat.init(data, '年份', 'GDP/亿元', 1);
	
	stat.multiLineGraph(text, ['GDP'], 0, 0);

	
	
}</span>

如果从2011年往后每年增长10%,那么：

如果每年增长5%呢？是这样的：

所以为了达到比2005年翻两番的目的，只要保持6%的年增长率就行了。

<span style="font-size:18px;">function myDraw(xGlobal, yGlobal) {  
	//GDP统计
	var config = new PlotConfiguration();      
	config.init();  
	
	config.setPreference();  
	var r = 20;
	//config.setSector(1,1,1,1);  
	//config.graphPaper2D(0, 0, r);
	//config.axis2D(0, 0,180);  

	var stat = new Statistic();        

	var data = [[184937],[216314],[265810],[314045],[340903],[401202]];
    var text = [];
	
	for (var i = 2005; i < 2021; i++) {
		text.push(i.toFixed(0));
	}
	
	var tmp = 400000;
	for (var i = 2011; i <2021; i++) {
		tmp *= 1.06;
		tmp = Math.round(tmp);
		data.push([tmp]);
	}
	
	stat.init(data, '年份', 'GDP/亿元', 1);
	
	stat.multiLineGraph(text, ['GDP'], 0, 0);

	
	
}</span>

<span style="font-size:18px;">function myDraw(xGlobal, yGlobal) {  
	//用水量
	var config = new PlotConfiguration();      
	config.init();  
	
	config.setPreference();  
	var r = 20;
	//config.setSector(1,1,1,1);  
	//config.graphPaper2D(0, 0, r);
	//config.axis2D(0, 0,180);  

	var stat = new Statistic();        
    var rawdata = [
		4.7, 2.0,3.1,2.3,5.2,2.8,7.3,4.3,4.8,6.7,
		4.5,5.1,6.5,8.9,2.0,4.5,3.2,3.2,4.5,3.5,
		3.5,3.5,3.6,4.9,3.7,3.8,5.6,5.5,5.9,6.2,
		5.7,3.9,4.0,4.0,7.0,3.7,8.3,4.2,6.4,3.5,
		4.5,4.5,4.6,5.4,5.6,6.6,5.8,4.5,6.2,7.5
	];  

	var data = [];
    var text = [];
	var len = rawdata.length;
	
	//初始化各组频数
	//
	var gap = 1;
	var start = 0;
	var end = 10;
	for (var i = start; i <= end; i+=gap) {
		data.push(0);
		text.push((i).toFixed(0));
	}	
	
	//频数统计
	var group;
	for (var i = 0; i < len; i++) {
		group = Math.floor((rawdata[i]-start)/gap);
		data[group]+=1;
	}
    
    stat.init(data, '用水量', '户数', 1); 
    stat.histogram(text, 0, 0); 
	
	
}</span>

一般人家每月用水量在4-5吨最多。

<span style="font-size:18px;">function myDraw(xGlobal, yGlobal) {  
	//耗油量
	var config = new PlotConfiguration();      
	config.init();  
	
	config.setPreference();  
	var r = 20;
	//config.setSector(1,1,1,1);  
	//config.graphPaper2D(0, 0, r);
	//config.axis2D(0, 0,180);  

	var stat = new Statistic();        
    var rawdata = [
		14.1,12.3,13.7,14.0,12.8,12.9,13.1,13.6,
		14.4,13.8,13.8,12.6,13.2,13.3,14.2,13.9,
		12.7,13.0,13.2,13.5,13.6,13.4,13.6,12.1,
		12.5,13.1,13.5,13.2,13.4,12.6
	];  

	var data = [];
    var text = [];
	var len = rawdata.length;
	
	//初始化各组频数
	//
	var gap = 0.5;
	var start = 11.9;
	var end = 14.9;
	for (var i = start; i < end; i+=gap) {
		data.push(0);

		text.push((i).toFixed(1));
	}	
	
	//频数统计
	var group;
	for (var i = 0; i < len; i++) {
		group = Math.floor((rawdata[i]-start)/gap);
		data[group]+=1;
	}
	
    //plot.fillText(data.length.toFixed(0), 100, 100, 100);
	
	
    stat.init(data, '耗油量', '辆数', 1); 
    stat.histogram(text, 0, 0); 
	
	
}</span>

到现在为止，小伟已经完成了筑基初期的所有修炼，即将进入筑基中期。好期待呀。

本节到此结束，欲知后事如何，请看下回分解。