update data
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@ -49,7 +49,7 @@ knitr::opts_chunk$set(echo = TRUE)
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- 采用`R语言`+`quarto`完成
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- 网页公开:[https://drwater.rcees.ac.cn/course/public/RWEP/\@PUB/index.html](https://drwater.rcees.ac.cn/course/public/RWEP/@PUB/index.html)
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- 课件代码:[https://drwater.rcees.ac.cn/git/course/RWEP.git](https://drwater.rcees.ac.cn/git/course/RWEP.git)
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- 代码web界面: [https://on.tty-share.com/s/hWkn5_eF6rfZuAyJu8sheMgrcRzx6AZ2m7V32IphFHs7gn-vP9WYOeVEYtH8a-bGTuM/](https://on.tty-share.com/s/hWkn5_eF6rfZuAyJu8sheMgrcRzx6AZ2m7V32IphFHs7gn-vP9WYOeVEYtH8a-bGTuM/)
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- 代码web界面:[https://on.tty-share.com/s/ny3JVrMuvUNOmnuioS3I7YEeVCi5Hk3Qc9vgz2QdX0FE2cYAQZFW2MUOkQyG0P5ZUR8/](https://on.tty-share.com/s/ny3JVrMuvUNOmnuioS3I7YEeVCi5Hk3Qc9vgz2QdX0FE2cYAQZFW2MUOkQyG0P5ZUR8/)
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## 如何学习接下来的内容?
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@ -36,7 +36,6 @@ library(tidyverse)
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library(nycflights13)
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```
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## tidy data
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```{r}
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@ -136,14 +135,20 @@ flights|>filter(dest=="IAH")|>
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group_by(year,month,day)|>summarize(n=n(),
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delay=mean(arr_delay,na.rm=TRUE))|>filter(n>10)
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flights|>filter(carrier=="UA",
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dest%in%c("IAH","HOU"),sched_dep_time>
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0900,sched_arr_time<2000)|>group_by(flight)|>
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summarize(delay=mean(
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arr_delay,na.rm=TRUE),cancelled=sum(is.na(arr_delay)),
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n=n())|>filter(n>10)
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```
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## 练习
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```{r}
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#| eval: false
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flights |>
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filter(dest == "IAH") |>
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group_by(year, month, day) |>
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summarize(n = n(),
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delay = mean(arr_delay, na.rm = TRUE)) |>
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filter(n > 10)
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```
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## quarto
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@ -274,12 +274,27 @@ geom_point(aes(fill = Area)) +
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dwfun::theme_sci()
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```
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## 练习
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```{r}
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#| eval: false
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metadf <- readxl::read_xlsx("../../data/airquality.xlsx")
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dir.create("../../data/metacity2/")
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metadf |>
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nest(sitedf = -site) |>
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mutate(flag = purrr::map2(site, sitedf,
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~ writexl::write_xlsx(.y, paste0("../../data/metacity2/", .x, ".xlsx"))))
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```
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## 练习
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```{r}
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#| include: false
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#| eval: false
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if (FALSE) {
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require(tidyverse)
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conn <- cctdb::get_dbconn("nationalairquality")
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metadf <- tbl(conn, "metadf") |>
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collect()
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@ -1208,6 +1208,21 @@ semi_join(df1, df2, by = "id")
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```
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## 练习
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合并`airquality.xlsx`中的数据。
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## 练习
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统计各城市白天与晚上的大气质量差异,计算不同指标差异最大的10个城市。
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## 欢迎讨论!{.center}
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@ -37,8 +37,8 @@ require(learnr)
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## 第7次课后作业
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1. 根据`airqualitydf.xlsx`,按采样点统计周末2天与工作日5天中空气质量指数(AQI)中位数,按城市统计低于所有采样点AQI30%分位值的采样点占比,列出上述占比最高的10个城市(不考虑采样点数低于5个的城市)。
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2. 按照不同城市分组,统计周末2天与工作日5天AQI中位数是否具有显著差异。
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1. 根据`airqualitydf.xlsx`,按采样点统计白天(8:00-20:00)与夜晚(20:00-8:00)中空气质量指数(AQI)中位数,按城市统计低于所有采样点AQI30%分位值的采样点占比,列出上述占比最高的10个城市(不考虑采样点数低于5个的城市)。
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2. 按照不同城市分组,统计白天与夜晚AQI中位数是否具有显著差异。
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作业模板:[第7次课后作业_模板.qmd](https://drwater.rcees.ac.cn/git/course/RWEP/raw/branch/main/SD/20240326_9_课后作业/第7次课后作业_模板.qmd)
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@ -18,8 +18,8 @@ total
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```
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# 根据`airqualitydf.xlsx`,按采样点统计周末2天与工作日5天中空气质量指数(AQI)中位数,按城市统计低于所有采样点AQI30%分位值的采样点占比,列出上述占比最高的10个城市(不考虑采样点数低于5个的城市)。
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# 根据`airqualitydf.xlsx`,按采样点统计白天(8:00-20:00)与夜晚(20:00-8:00)中空气质量指数(AQI)中位数,按城市统计低于所有采样点AQI30%分位值的采样点占比,列出上述占比最高的10个城市(不考虑采样点数低于5个的城市)。
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# 按照不同城市分组,统计周末2天与工作日5天AQI中位数是否具有显著差异。
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# 按照不同城市分组,统计白天与夜晚AQI中位数是否具有显著差异。
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@ -24,7 +24,7 @@ website:
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page-navigation: true
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page-footer: "Copyright 2024, [Ming Su](https://drwater.rcees.ac.cn)"
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navbar:
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background: "grey"
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background: "light"
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search: true
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right:
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- icon: house
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