83 lines
1.6 KiB
Plaintext
83 lines
1.6 KiB
Plaintext
---
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title: "代码编写规则"
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subtitle: 《区域水环境污染数据分析实践》<br>Data analysis practice of regional water environment pollution
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author: 苏命、王为东<br>中国科学院大学资源与环境学院<br>中国科学院生态环境研究中心
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date: today
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lang: zh
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format:
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revealjs:
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theme: dark
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slide-number: true
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chalkboard:
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buttons: true
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preview-links: auto
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lang: zh
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toc: true
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toc-depth: 1
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toc-title: 大纲
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logo: ./_extensions/inst/img/ucaslogo.png
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css: ./_extensions/inst/css/revealjs.css
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pointer:
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key: "p"
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color: "#32cd32"
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pointerSize: 18
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revealjs-plugins:
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- pointer
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filters:
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- d2
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---
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```{r}
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#| echo: false
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knitr::opts_chunk$set(echo = TRUE)
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source("../../coding/_common.R")
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library(tidyverse)
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library(nycflights13)
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```
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## 代码编写规则
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```{r}
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#| eval: false
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# Strive for:
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short_flights <- flights |> filter(air_time < 60)
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# Avoid:
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SHORTFLIGHTS <- flights |> filter(air_time < 60)
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# Strive for
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z <- (a + b)^2 / d
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# Avoid
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z<-( a + b ) ^ 2/d
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# Strive for
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mean(x, na.rm = TRUE)
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# Avoid
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mean (x ,na.rm=TRUE)
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```
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## 练习
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```{r}
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flights|>filter(dest=="IAH")|>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",dest%in%c("IAH","HOU"),sched_dep_time>
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0900,sched_arr_time<2000)|>group_by(flight)|>summarize(delay=mean(
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arr_delay,na.rm=TRUE),cancelled=sum(is.na(arr_delay)),n=n())|>filter(n>10)
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```
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## 欢迎讨论！{.center}
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`r rmdify::slideend(wechat = FALSE, type = "public", tel = FALSE, thislink = "https://drwater.rcees.ac.cn/course/public/RWEP/@PUB/SD/")`
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