一、五大窗口
Command窗口:实现人机交互
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来导入一个自带数据:
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sysuse是导入系统自带的数据,auto导入该数据的名称,后面的clear是清除之前的数据
结果窗口:展示计算结果、查找功能
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在Edit的find可以实现查找功能,或者ctrl+f;清屏右击有clear
回顾窗口:保存执行过的命令,漏斗可以进行筛选,点击后会自动跑到命令窗口,直接双击会执行
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导入编辑器可以保存:
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变量窗口:
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小箭头可以把变量搞到命令窗口:
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只保留选中变量:
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删除选中变量:
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属性窗口:上面是变量属性,下面是数据属性
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通过锁可以修改属性:
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比如来一个线性回归:
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解释变量、被解释变量:
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返回默认:
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转到工作目录:
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do文档编辑器:
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二、基本操作
browse命令:
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红色的就是字符串,黑色的就是数值,蓝色的就是值标签
describe:描述数据
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summarize:统计一下
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br if missing():查看缺失值
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tabulate:制表
不同段的不同分布
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ttest :假设检验
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correlate :相关性检验
呈现一个负相关
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twoway (scatter weight length):做一个散点图
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加一个拟合直线:
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来设置一个模型:
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设置一下变量然后回归一下:
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生成拟合值(得出变量估计值):
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生成残差:predict u,resid
打开Editor,可以看见右边多了三个列
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来个图,先对weight排序一下:
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viewer:
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Viewer主要用来help。