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频率推理（Frequentist inference is a type of statistical inference that draws conclusions from sample data by emphasizing the frequency or proportion of th 阅读全文
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相关概念：极大似然估计，score function，Fisher information Let f(X; θ) be the probability density function (or probability mass function) for X conditional on the 阅读全文
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世界地图： 中国地图： 合并数据到地图数据： 阅读全文
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向原有线中增添数据，加入人的信息 阅读全文
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dplot <- ggplot(diamonds, aes(clarity, fill = cut)) ##按cut类 计数填充 dplot + geom_bar(position = "stack")##条形图 分类 dplot + geom_bar(position = "fill")##等高条形图 dplot + geom_bar(position = "dodge")##并排分类条形图 ... 阅读全文
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p<-ggplot(diamonds,aes(carat, price)) p + geom_point(colour="red") p + geom_point(aes(colour= color, shape= color)) p + geom_histogram(stat="identity", binwidth = 500) p + geom_path() p + geom_line... 阅读全文
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Data：diamonds 变换 阅读全文
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阿飞正传-- 重庆森林-- 花样年华-- 堕落天使 甜蜜蜜 春光乍泄 戏梦巴黎-- 已婚女人-- 女人就是女人-- 发条橙-- 蝙蝠侠 黑暗骑士 他人の顔 (1966)The.Face.Of.Another one fine day 1996 阅读全文
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In statistics, a fixed effects model is a statistical model that represents the observed quantities in terms of explanatory variables that are treated 阅读全文
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Panel data In statistics and econometrics, the term panel data (or longitudinal data) refers to multi-dimensional data frequently involving measuremen 阅读全文