render compile

.source_state

@@ -0,0 +1 @@
+75ab32db1cd9222c3a3f959c30cd2363

Makefile

@@ -0,0 +1,382 @@
+# Makefile for Quarto Project Automation
+# Detect OS
+HOSTNAME := $(shell hostname)
+OS := $(shell uname | tr A-Z a-z)
+ifeq ($(OS), darwin)
+    SEDI := sed -i ''
+    OS := OSX
+else ifeq ($(OS), linux)
+    SEDI := sed -i
+    OS := linux
+else
+    $(error Unknown operating system)
+endif
+
+# Fetch Git branch and project details
+branchname := $(shell git branch --show-current)
+reponame := $(shell basename $(shell git rev-parse --show-toplevel))
+projtype := $(shell basename $(shell dirname $(shell git rev-parse --show-toplevel)))
+pubtype := $(if $(findstring PUB,$(branchname)),public,protected)
+remotedir := dwuser@drwater.net:/home/www/drc/$(projtype)/$(pubtype)/$(reponame)/$(branchname)
+outputdir := $(shell awk -F': *' '/^ *output-dir:/ {print $$2 "/" }' ./_quarto.yml)
+siteurl := https://drc.drwater.net/$(projtype)/$(pubtype)/$(reponame)/$(branchname)
+
+branchnames := "TX\|FJ\|YF\|ZY\|WW\|JB\|YY\|YJ\|DYF"
+
+# Variables for colors and port
+bcolor := grey
+port := 4199
+
+# Set background color based on branch name
+ifeq ($(findstring R1,$(branchname)),R1)
+    bcolor := orange
+else ifeq ($(findstring R2,$(branchname)),R2)
+    bcolor := lightblue
+else ifeq ($(findstring R3,$(branchname)),R3)
+    bcolor := lightgreen
+else ifeq ($(findstring PUB,$(branchname)),PUB)
+    bcolor := light
+endif
+
+# Set port based on branch name
+branch_ports := main:4200 SM:4201 TX:4202 FJ:4203 YF:4204 ZY:4205 WW:4206 JB:4207 YY:4208 YJ:4209 DYF:4210
+port := $(shell echo $(branch_ports) | tr " " "\n" | grep -E "^$(branchname):" | sed -E 's/^$(branchname):([0-9]+)/\1/')
+port := $(if $(port),$(port),4199)
+
+# Define the state file
+STATE_FILE := .source_state
+
+# checkfile
+GREPSTR := " \|(\|)\|^submit\|^analysis\|_cache\|_freeze\|^site_libs\|^www"
+
+# Default target
+.PHONY: all preview readme rsync local clean upload fix_links force check_git_status
+
+all: local upload clean commit push
+	
+force: updrefbib check_git_status updvariable render
+
+local: updrefbib check_git_status updvariable lazyrender
+
+updmakefile:
+	@if [ "$(OS)" = "OSX" ] && [ "$(HOSTNAME)" = "max" ]; then \
+		echo "基于 $$HOME/bin/publish2dw.Makefile 更新本项目 Makefile..."; \
+		cp "$$HOME/bin/publish2dw.Makefile" "./Makefile"; \
+		git add "Makefile" && git commit -m "Update Makefile"; \
+		echo "本项目Makefile更新完成."; \
+	else \
+		echo "Makefile 无需在本系统上更新."; \
+	fi
+
+
+updrefbib:
+	@if [ "$(OS)" = "OSX" ] && [ "$(HOSTNAME)" = "max" ]; then \
+		echo "更新本项目参考文献..."; \
+		cp "$$HOME/literature/Ref.bib" "./BB/"; \
+		echo "推送本地参考文献到远程服务器..."; \
+		rsync -azvu --progress "$$HOME/literature/Ref.bib" "drwater.net:/home/www/drc/datapool/public/BB/Ref.bib"; \
+		echo "本项目参考文献更新完成."; \
+	else \
+	  echo "检查网络连通性..."; \
+		if ping -c 1 -W 1 drc.drwater.net > /dev/null 2>&1; then \
+			echo "网络正常，更新本项目参考文献..."; \
+			wget -O BB/Ref.bib "https://drc.drwater.net/datapool/public/BB/Ref.bib"; \
+			echo "本项目参考文献更新完成."; \
+		else \
+			echo "网络不可用，跳过参考文献更新."; \
+		fi; \
+	fi; \
+	git add BB/Ref.bib; \
+	if [ "$$(git diff --cached)" ]; then \
+		git commit -m "Update Ref.bib"; \
+	fi
+
+check_git_status:
+	@uncommitted=$$(git status --porcelain); \
+	if [ -n "$$uncommitted" ]; then \
+	  git status; \
+		read -p "当前存在未提交的修改（如上），是否要提交？(Y/N, default is N): " answer; \
+		answer=$${answer:-N}; \
+		if [ "$$answer" = "Y" ] || [ "$$answer" = "y" ]; then \
+			read -p "请输入修改说明: " message; \
+			git add . && git commit -m "$$message"; \
+		else \
+			echo "未提交，如后续操作为pull，则无法继续"; \
+		fi; \
+	fi
+
+
+
+# Lazy render with hash checking
+lazyrender:
+	@current_hash=$$(find $(shell git ls-files "*.qmd" "_*.yml" "*.pdf" "*.svg" "*.png" | grep -v $(GREPSTR)) -exec cat {} + | md5sum | awk '{print $$1}'); \
+	if [ ! -f $(STATE_FILE) ] || [ "$$current_hash" != "$$(cat $(STATE_FILE))" ]; then \
+		echo "源文件发生变化, 重新编译..."; \
+		echo "$$current_hash" > $(STATE_FILE); \
+		$(MAKE) render; \
+	else \
+		echo "源文件无变化, 跳过编译..."; \
+		exit 0; \
+	fi
+
+# Render target
+render:
+	@quarto render
+
+commit:
+	@echo "提交修改(commit)..."; \
+		git add .; \
+		if [ -n "$$(git diff --cached)" ]; then \
+		git commit -m "render compile"; \
+		else \
+		echo "没有修改记录，跳过."; \
+		fi; \
+
+# Pull changes from the specified branch based on the current branch
+pull:
+	@echo "从远程拉取项目更新..."; \
+		$(MAKE) check_git_status; \
+		git pull; \
+		current_branch=$$(git rev-parse --abbrev-ref HEAD); \
+		if [ "$$current_branch" = main ]; then \
+		  echo "当前分枝为$$current_branch."; \
+			remote_branch=$$(git branch --remote | grep -v 'main' | grep $(branchnames) | awk '{print $$1}' | sed 's/origin\///' | head -n 1); \
+			if [ -n "$$remote_branch" ]; then \
+		    echo "尝试从远程分枝$$remote_branch 拉取更新..."; \
+				git pull --rebase origin $$remote_branch; \
+			else \
+				echo "远程无可用分支$$remote_branch."; \
+			fi; \
+			else \
+			echo "尝试将远程main分枝合并至本地$$current_branch 分枝."; \
+			git pull --rebase origin main; \
+		fi
+
+# Pull changes from the main branch
+pullmain:
+	$(MAKE) check_git_status; \
+		@current_branch=$$(git rev-parse --abbrev-ref HEAD); \
+		@echo "尝试将远程main分枝合并至本地$$current_branch 分枝."; \
+		git pull --rebase origin main; \
+
+push:
+	@echo "推送到远程..."; \
+		git push
+
+filehash:
+	@current_hash=$$(find $(shell git ls-files "*.qmd" "_*.yml" "*.pdf" "*.svg" "*.png" | grep -v $(GREPSTR)) -exec cat {} + | md5sum | awk '{print $$1}'); \
+	echo "$$current_hash" > $(STATE_FILE)
+
+# Preview the site on a specific port
+preview:
+	@quarto preview --port $(port)
+
+# Generate README.md
+readme:
+	@quarto render index.qmd -t markdown -o README.md
+	@sed -e '/^---/,/^---/d' "$(outputdir)/README.md" > README.md
+	@rm "$(outputdir)/README.md"
+
+# Sync files with remote server
+rsync:
+	@rsync -azvu --progress --delete -r "$(outputdir)" "$(remotedir)"
+
+# Open local site
+open:
+	@if [ "$(OS)" = "OSX" ]; then open "$(outputdir)/index.html"; fi
+
+# Clean unnecessary files
+clean:
+	@rm -f ./*.spl  ./*.bbl ./*.blg ./*.log ./*.tex ./*.bcf ./*.tex.sedbak ./*.fdb_latexmk
+
+# Upload files to server and fix links
+upload: backupdocx
+	@mkdir -p "$(outputdir)" && chmod -R 2775 "$(outputdir)"
+	@$(MAKE) fix_links
+	@if rsync -azvu --progress --delete -r "$(outputdir)" "$(remotedir)"; then \
+		if [ "$(OS)" = "OSX" ]; then \
+			open "$(siteurl)" 2>/dev/null; \
+		fi; \
+	else \
+		echo "Rsync failed. Attempting alternative upload method..."; \
+		mkdir -p "$(reponame)"; \
+		rsync -azvu --progress --delete -r "$(reponame)" "$(dir $(remotedir))"; \
+		rm -rf "$(reponame)"; \
+		rsync -azvu --progress --delete -r "$(outputdir)" "$(remotedir)"; \
+		if [ "$(OS)" = "OSX" ]; then \
+			open "$(siteurl)" 2>/dev/null; \
+		fi; \
+	fi
+
+backupdocx:
+	@echo "备份MS.docx文件..."; \
+	currentcommithash=$$(git rev-parse --short HEAD); \
+	datetime=$$(git show -s --format=%ci $$currentcommithash | sed 's/[-: ]//g' | cut -c3-12); \
+	mkdir -p TC/MS/; \
+	existing_file=$$(find TC/MS -name "MS*.docx" -exec cmp -s www/MS/MS.docx {} \; -print -quit); \
+	if [ -n "$$existing_file" ]; then \
+		echo "与www/MS/MS.docx 内容相同的备份文件已存在: $$existing_file"; \
+		echo "无需备份."; \
+	else \
+		if [ ! -e TC/MS/MS$${datetime}_$${currentcommithash}.docx ]; then \
+			cp www/MS/MS.docx TC/MS/MS$${datetime}_$${currentcommithash}.docx; \
+			echo "备份TC/MS/MS$${datetime}_$${currentcommithash}.docx完成."; \
+			git add TC/MS/MS$${datetime}_$${currentcommithash}.docx; \
+			if [ "$$(git diff --cached)" ]; then \
+				git commit -m "备份TC/MS/MS$${datetime}_$${currentcommithash}.docx"; \
+			fi; \
+		else \
+			echo "TC/MS/MS$${datetime}_$${currentcommithash}.docx已存在，无需备份."; \
+		fi; \
+	fi;
+
+
+trackchange:
+	@if [ "$(projtype)" != "manuscript" ]; then \
+	exit 0; \
+	fi; \
+	echo "选择两个提交以比较文档..."; \
+	hashes=$$(git log --pretty=format:'%h: %s BY %an (%ar)' \
+	| grep -E "$$(ls TC/MS/*.docx | xargs -n1 basename | sed -E 's/MS.*_([0-9a-f]+)\.docx/\1/' | tr '\n' '|')SMT_】" \
+	| fzf --multi --reverse --preview="echo {}" ); \
+	echo $$hashes; \
+	hash1=$$(echo $$hashes | sed -e 's/) \([a-z0-9]\{7\}:\)/)\n\1/g' | tail -n 1 | awk '{print $$1}' | tr -d ':'); \
+	hash1=$$(git rev-parse --short $${hash1}^); \
+	datetime1=$$(git show -s --format=%ci $$hash1 | sed 's/[-: ]//g' | cut -c3-12); \
+	hash2=$$(echo $$hashes | sed -e 's/) \([a-z0-9]\{7\}:\)/)\n\1/g' | head -n 1 | awk '{print $$1}' | tr -d ':'); \
+	hash2=$$(git rev-parse --short $${hash2}^); \
+	datetime2=$$(git show -s --format=%ci $$hash2 | sed 's/[-: ]//g' | cut -c3-12); \
+	if [ -z "$$hash1" ] || [ -z "$$hash2" ]; then \
+	echo "必须选择两个提交."; \
+	exit 1; \
+	fi; \
+	doc1="TC/MS/MS$${datetime1}_$$hash1.docx"; \
+	echo "$$doc1"; \
+	doc2="TC/MS/MS$${datetime2}_$$hash2.docx"; \
+	echo "$$doc2"; \
+	if [ -f "$$doc1" ] && [ -f "$$doc2" ] && [ "$$doc1" != "$$doc2" ]; then \
+	echo "打开文件: $$doc1 和 $$doc2"; \
+	open "$$doc1" "$$doc2"; \
+	printf "MS$${datetime1}-$${datetime2}_$${hash1}-$${hash2}" | pbcopy; \
+	echo "请在word中对比两个版本形成带修改痕迹的版本，并保存至TC/MS$${datetime1}-$${datetime2}_$${hash1}-$${hash2}.docx!"; \
+	else \
+	echo "一个或两个文件不存在: $$doc1, $$doc2"; \
+	exit 1; \
+	fi
+
+# Fix links in www directory
+fix_links:
+	@find ./www -type f -name "*.html" -exec sed -i.bak \
+		-e "s/{{< var branch >}}/$(branchname)/g" \
+		-e "s/{{< var pubtype >}}/$(pubtype)/g" \
+		-e "s/{{< var projtype >}}/$(projtype)/g" \
+		-e "s/{{< var reponame >}}/$(reponame)/g" \
+		-e "s/$(reponame)\/blob/$(reponame)\/raw\/branch/g" \
+		-e "s/$(reponame)\/edit/$(reponame)\/_edit/g" {} +
+	@find ./www -type f -name "*.bak" -exec rm {} +
+
+updvariable:
+	@touch _variables.yml  # 如果文件不存在则创建
+	@grep -q '^reponame:' _variables.yml || echo "reponame: $(reponame)" >> _variables.yml
+	@if grep -q '^reponame:' _variables.yml; then \
+		$(SEDI) 's/^reponame:.*/reponame: $(reponame)/' _variables.yml; \
+	else \
+		echo "reponame: $(reponame)" >> _variables.yml; \
+	fi
+	@grep -q '^projtype:' _variables.yml || echo "projtype: $(projtype)" >> _variables.yml
+	@if grep -q '^projtype:' _variables.yml; then \
+		$(SEDI) 's/^projtype:.*/projtype: $(projtype)/' _variables.yml; \
+	else \
+		echo "projtype: $(projtype)" >> _variables.yml; \
+	fi
+	@grep -q '^branch:' _variables.yml || echo "branch: $(branchname)" >> _variables.yml
+	@if grep -q '^branch:' _variables.yml; then \
+		$(SEDI) 's/^branch:.*/branch: $(branchname)/' _variables.yml; \
+	else \
+		echo "branch: $(branchname)" >> _variables.yml; \
+	fi
+	@grep -q '^pubtype:' _variables.yml || echo "pubtype: $(pubtype)" >> _variables.yml
+	@if grep -q '^pubtype:' _variables.yml; then \
+		$(SEDI) 's/^pubtype:.*/pubtype: $(pubtype)/' _variables.yml; \
+	else \
+		echo "pubtype: $(pubtype)" >> _variables.yml; \
+	fi
+	@grep -q '^nwAB:' _variables.yml || echo "nwAB: $(nwAB)" >> _variables.yml
+	@if grep -q '^nwAB:' _variables.yml; then \
+		$(SEDI) 's/^nwAB:.*/nwAB: $(nwAB)/' _variables.yml; \
+	else \
+		echo "nwAB: $(nwAB)" >> _variables.yml; \
+	fi
+	@grep -q '^nwMS:' _variables.yml || echo "nwMS: $(nwMS)" >> _variables.yml
+	@if grep -q '^nwMS:' _variables.yml; then \
+		$(SEDI) 's/^nwMS:.*/nwMS: $(nwMS)/' _variables.yml; \
+	else \
+		echo "nwMS: $(nwMS)" >> _variables.yml; \
+	fi
+	@grep -q '^figtblMS:' _variables.yml || echo "figtblMS: $(figtblMS)" >> _variables.yml
+	@if grep -q '^figtblMS:' _variables.yml; then \
+		$(SEDI) 's/^figtblMS:.*/figtblMS: $(figtblMS)/' _variables.yml; \
+	else \
+		echo "figtblMS: $(figtblMS)" >> _variables.yml; \
+	fi
+	@grep -q '^figtblSM:' _variables.yml || echo "figtblSM: $(figtblSM)" >> _variables.yml
+	@if grep -q '^figtblSM:' _variables.yml; then \
+		$(SEDI) 's/^figtblSM:.*/figtblSM: $(figtblSM)/' _variables.yml; \
+	else \
+		echo "figtblSM: $(figtblSM)" >> _variables.yml; \
+	fi
+	@mkpapervar
+
+
+# Help: list all available commands with descriptions (English and Chinese)
+help:
+	@echo "Makefile for Quarto Project Automation"
+	@echo "======================================="
+	@echo "Available targets (English):"
+	@echo ""
+	@echo "  make all           - Execute local build, upload, clean, and commit"
+	@echo "  make force         - Force render, hash update, upload, clean, and commit"
+	@echo "  make local         - Check git status and perform a lazy render if changes detected"
+	@echo "  make check_git_status - Check for uncommitted changes and ask to commit them"
+	@echo "  make lazyrender    - Render if source files have changed based on hash comparison"
+	@echo "  make render        - Force Quarto to render the project"
+	@echo "  make commit        - Commit changes if no previous uncommitted changes"
+	@echo "  make filehash      - Generate and store the file hash of source files"
+	@echo "  make preview       - Preview the site locally on the specific port (default: 4199)"
+	@echo "  make readme        - Render README.md from Quarto index.qmd"
+	@echo "  make rsync         - Sync output files with the remote server"
+	@echo "  make open          - Open the generated site locally in the browser"
+	@echo "  make clean         - Clean up unnecessary files"
+	@echo "  make upload        - Upload files to the server and fix links"
+	@echo "  make fix_links     - Fix HTML links in the 'www' directory for the remote server"
+	@echo "  make updmakefile   - Update the Makefile"
+	@echo "  make help          - Display this help message"
+	@echo ""
+	@echo "Available targets (中文):"
+	@echo ""
+	@echo "  make all           - 执行本地构建、上传、清理和提交"
+	@echo "  make force         - 强制渲染、更新哈希、上传、清理并提交"
+	@echo "  make local         - 检查Git状态，若检测到更改则进行懒惰渲染"
+	@echo "  make check_git_status - 检查未提交的更改，并询问是否提交"
+	@echo "  make lazyrender    - 如果源文件发生更改，则根据哈希比较进行渲染"
+	@echo "  make render        - 强制 Quarto 渲染项目"
+	@echo "  make commit        - 如果没有未提交的更改则提交"
+	@echo "  make filehash      - 生成并存储源文件的哈希值"
+	@echo "  make preview       - 本地在特定端口预览网站 (默认: 4199)"
+	@echo "  make readme        - 从 Quarto 的 index.qmd 生成 README.md"
+	@echo "  make rsync         - 将输出文件同步到远程服务器"
+	@echo "  make open          - 在浏览器中打开生成的网站"
+	@echo "  make clean         - 清理不必要的文件"
+	@echo "  make upload        - 上传文件到服务器并修复链接"
+	@echo "  make fix_links     - 修复 'www' 目录中的 HTML 链接"
+	@echo "  make updmakefile   - 更新本项目 Makefile"
+	@echo "  make help          - 显示此帮助信息"
+	@echo ""
+	@echo "Environment variables (English and 中文):"
+	@echo "  bcolor             - Background color based on branch name (基于分支名的背景颜色)"
+	@echo "  port               - Port number based on branch name (基于分支名的端口号)"
+	@echo "  STATE_FILE         - File for storing hash state of source files (用于存储源文件哈希状态的文件)"
+	@echo "  siteurl            - The URL where the site will be hosted (网站托管的 URL)"
+	@echo ""
+
+

SD/1_datavisualize/index.qmd

@@ -3934,5 +3934,5 @@ p
 ## 欢迎讨论！{.center}
 
 
-`r rmdify::slideend(wechat = FALSE, type = "public", tel = FALSE, thislink = "https://drwater.rcees.ac.cn/course/public/RWEP/@PUB/SD/")`
+`r rmdify::slideend(wechat = FALSE, type = "public", tel = FALSE, thislink = "https://drc.drwater.net/course/public/RWEP/PUB/SD/")`
 

SD/1_model/index.qmd

@@ -1421,5 +1421,4 @@ geom_smooth(method = "lm", colour = "black")
 ## 欢迎讨论！{.center}
 
 
-`r rmdify::slideend(wechat = FALSE, type = "public", tel = FALSE, thislink = "https://drwater.rcees.ac.cn/course/public/RWEP/@PUB/SD/")`
-
+`r rmdify::slideend(wechat = FALSE, type = "public", tel = FALSE, thislink = "https://drc.drwater.net/course/public/RWEP/PUB/SD/")`

SD/2_大数据分析工具/index.qmd

@@ -163,5 +163,4 @@ babynames |>
 ## 欢迎讨论！{.center}
 
 
-`r rmdify::slideend(wechat = FALSE, type = "public", tel = FALSE, thislink = "https://drwater.rcees.ac.cn/course/public/RWEP/@PUB/SD/")`
-
+`r rmdify::slideend(wechat = FALSE, type = "public", tel = FALSE, thislink = "https://drc.drwater.net/course/public/RWEP/PUB/SD/")`

SD/2_实践部分/index.qmd

@@ -100,5 +100,4 @@ geom_bar(position = "fill")
 ## 欢迎讨论！{.center}
 
 
-`r rmdify::slideend(wechat = FALSE, type = "public", tel = FALSE, thislink = "https://drwater.rcees.ac.cn/course/public/RWEP/@PUB/SD/")`
-
+`r rmdify::slideend(wechat = FALSE, type = "public", tel = FALSE, thislink = "https://drc.drwater.net/course/public/RWEP/PUB/SD/")`

SD/9_课后作业6/index.html

@@ -0,0 +1,655 @@
+<!DOCTYPE html>
+<html lang="zh-Hans"><head>
+<script src="../../site_libs/clipboard/clipboard.min.js"></script>
+<script src="../../site_libs/quarto-html/tabby.min.js"></script>
+<script src="../../site_libs/quarto-html/popper.min.js"></script>
+<script src="../../site_libs/quarto-html/tippy.umd.min.js"></script>
+<link href="../../site_libs/quarto-html/tippy.css" rel="stylesheet">
+<link href="../../site_libs/quarto-html/light-border.css" rel="stylesheet">
+<link href="../../site_libs/quarto-html/quarto-syntax-highlighting-dark-31d8df3fb4b3ebd213a509f950828e75.css" rel="stylesheet" id="quarto-text-highlighting-styles"><meta charset="utf-8">
+  <meta name="generator" content="quarto-1.7.1">
+
+  <meta name="author" content="苏命、王为东 中国科学院大学资源与环境学院 中国科学院生态环境研究中心">
+  <meta name="dcterms.date" content="2025-03-17">
+  <title>Version: {{&lt; var branch &gt;}} – 课后作业6</title>
+  <meta name="apple-mobile-web-app-capable" content="yes">
+  <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, minimal-ui">
+  <link rel="stylesheet" href="../../site_libs/revealjs/dist/reset.css">
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+</head>
+<body class="quarto-dark">
+  <div class="reveal">
+    <div class="slides">
+
+<section id="title-slide" class="quarto-title-block center">
+  <h1 class="title">课后作业6</h1>
+  <p class="subtitle">《区域水环境污染数据分析实践》<br>Data analysis practice of regional water environment pollution</p>
+
+<div class="quarto-title-authors">
+<div class="quarto-title-author">
+<div class="quarto-title-author-name">
+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 
+</div>
+</div>
+</div>
+
+  <p class="date">2025-03-17</p>
+</section>
+<section id="第6次课后作业" class="slide level2">
+<h2><a href="第6次课后作业_模板.html">第6次课后作业</a></h2>
+<ol type="1">
+<li>如何在 R 中将数字 10 赋值给变量 x？</li>
+<li>在 R 中，如何创建一个包含数字 1 到 5 的向量？</li>
+<li>编写一个条件语句，如果变量 age 大于等于 18，则打印 “成年人”，否则打印 “未成年人”。</li>
+<li>使用 for 循环打印从 1 到 10 的整数。</li>
+<li>编写一个名为 addition 的函数，接受两个参数 a 和 b，返回它们的和。</li>
+<li>创建一个列表，包含三个元素：一个数字向量、一个字符向量和一个逻辑向量。</li>
+<li>使用 read.csv() 函数读取名为 data.csv 的 CSV 文件，并将数据存储在一个名为 data 的数据框中。</li>
+<li>从数据框中选择前五行，并将结果存储在一个新的数据框中。</li>
+<li>将字符串 “hello world” 转换为大写。</li>
+<li>从数据框中选择 score 列大于等于 90 的行。</li>
+</ol>
+</section>
+<section id="data.csv内容" class="slide level2">
+<h2><strong>data.csv</strong>内容</h2>
+<pre><code>name,age,score
+Alice,25,85
+Bob,30,92
+Charlie,28,89
+David,22,95
+Eva,35,87
+Frank,27,91
+Grace,29,88
+Helen,26,93
+Ivan,31,86
+Jack,24,94
+Kelly,32,89
+Lily,28,90
+Mike,33,85
+Nancy,27,92
+Olivia,34,88
+Peter,29,93
+Queen,25,89
+Ryan,30,94
+Samantha,26,91
+Tom,31,87
+</code></pre>
+</section>
+<section id="欢迎讨论" class="slide level2 center">
+<h2>欢迎讨论！</h2>
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SD/9_课后作业8/index.html

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+  <meta name="dcterms.date" content="2025-03-17">
+  <title>Version: {{&lt; var branch &gt;}} – 课后作业8</title>
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+  <div class="reveal">
+    <div class="slides">
+
+<section id="title-slide" class="quarto-title-block center">
+  <h1 class="title">课后作业8</h1>
+  <p class="subtitle">《区域水环境污染数据分析实践》<br>Data analysis practice of regional water environment pollution</p>
+
+<div class="quarto-title-authors">
+<div class="quarto-title-author">
+<div class="quarto-title-author-name">
+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 
+</div>
+</div>
+</div>
+
+  <p class="date">2025-03-17</p>
+</section>
+<section id="第8次课后作业" class="slide level2">
+<h2>第8次课后作业</h2>
+<ol type="1">
+<li>根据<code>airqualitydf.xlsx</code>，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）。</li>
+<li>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。</li>
+</ol>
+<p>作业模板：<a href="https://drwater.rcees.ac.cn/git/course/RWEP/raw/branch/main/SD/20240328_9_课后作业/第8次课后作业_模板.qmd">第8次课后作业_模板.qmd</a></p>
+</section>
+<section id="示例代码" class="slide level2">
+<h2>示例代码</h2>
+<h3 id="基于r的示例结果">基于R的示例结果</h3>
+<ul>
+<li><a href="./第8次课后作业_模板.html">第8次课后作业R示例代码结果</a></li>
+</ul>
+<h3 id="基于sas的示例结果">基于SAS的示例结果</h3>
+<ul>
+<li><a href="./第8次课后作业_模板.sas">第8次课后作业SAS示例代码</a></li>
+<li><a href="./median.pdf">第8次课后作业SAS示例结果1</a></li>
+<li><a href="./freq.pdf">第8次课后作业SAS示例结果2</a></li>
+<li><a href="./airqualitymedianoutrow5.pdf">第8次课后作业SAS示例结果3</a></li>
+<li><a href="./npar1wayConover.pdf">第8次课后作业SAS示例结果4</a></li>
+</ul>
+</section>
+<section id="欢迎讨论" class="slide level2 center">
+<h2>欢迎讨论！</h2>
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