render compile
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		@@ -1 +1 @@
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75ab32db1cd9222c3a3f959c30cd2363
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8a3f81986b4932245c23eee5be50040b
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@@ -197,16 +197,19 @@ taxi
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#| 
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set.seed(123)
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library(forcats)
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one_split <- slice(taxi, 1:30) %>% 
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  initial_split() %>% 
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  tidy() %>% 
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  add_row(Row = 1:30, Data = "Original") %>% 
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  mutate(Data = case_when(
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require(tidymodels)
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require(tidyverse)
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one_split <- taxi |>
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  dplyr::slice(1:30) |> 
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  rsample::initial_split() |>
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  generics::tidy() |>
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  tibble::add_row(Row = 1:30, Data = "Original") |>
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  dplyr::mutate(Data = case_when(
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    Data == "Analysis" ~ "Training",
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    Data == "Assessment" ~ "Testing",
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    TRUE ~ Data
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  )) %>% 
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  mutate(Data = factor(Data, levels = c("Original", "Training", "Testing")))
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  )) |>
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  dplyr::mutate(Data = factor(Data, levels = c("Original", "Training", "Testing")))
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all_split <-
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  ggplot(one_split, aes(x = Row, y = fct_rev(Data), fill = Data)) + 
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  geom_tile(color = "white",
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<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>
 | 
			
		||||
 | 
			
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<div class="quarto-title-authors">
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<div class="quarto-title-author">
 | 
			
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<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 
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</div>
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</div>
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</div>
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  <p class="date">2025-03-17</p>
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</section>
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		||||
<section id="第6次课后作业" class="slide level2">
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		||||
<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>
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		||||
</ol>
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		||||
</section>
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		||||
<section id="data.csv内容" class="slide level2">
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<h2><strong>data.csv</strong>内容</h2>
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<pre><code>name,age,score
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		||||
Alice,25,85
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		||||
Bob,30,92
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		||||
Charlie,28,89
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		||||
David,22,95
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		||||
Eva,35,87
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		||||
Frank,27,91
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		||||
Grace,29,88
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		||||
Helen,26,93
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		||||
Ivan,31,86
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Jack,24,94
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Kelly,32,89
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Lily,28,90
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Mike,33,85
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Nancy,27,92
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Olivia,34,88
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Peter,29,93
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Queen,25,89
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Ryan,30,94
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Samantha,26,91
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Tom,31,87
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</code></pre>
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</section>
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<section id="欢迎讨论" class="slide level2 center">
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<h2>欢迎讨论!</h2>
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<section id="title-slide" class="quarto-title-block center">
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  <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>
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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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 | 
			
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<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>
 | 
			
		||||
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 | 
			
		||||
<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>
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<h3 id="基于r的示例结果">基于R的示例结果</h3>
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<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>
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 | 
			
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<h3 id="基于sas的示例结果">基于SAS的示例结果</h3>
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<ul>
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		||||
<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>
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<section id="欢迎讨论" class="slide level2 center">
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<h2>欢迎讨论!</h2>
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 | 
			
		||||
        const mode = bsSheetEl.getAttribute("data-mode");
 | 
			
		||||
        const bodyEl = window.document.querySelector("body");
 | 
			
		||||
        if (mode === "dark") {
 | 
			
		||||
          bodyEl.classList.add("quarto-dark");
 | 
			
		||||
          bodyEl.classList.remove("quarto-light");
 | 
			
		||||
        } else {
 | 
			
		||||
          bodyEl.classList.add("quarto-light");
 | 
			
		||||
          bodyEl.classList.remove("quarto-dark");
 | 
			
		||||
        }
 | 
			
		||||
      }
 | 
			
		||||
      const toggleBodyColorPrimary = () => {
 | 
			
		||||
        const bsSheetEl = window.document.querySelector("link#quarto-bootstrap");
 | 
			
		||||
        if (bsSheetEl) {
 | 
			
		||||
          toggleBodyColorMode(bsSheetEl);
 | 
			
		||||
        }
 | 
			
		||||
      }
 | 
			
		||||
      toggleBodyColorPrimary();  
 | 
			
		||||
      const tabsets =  window.document.querySelectorAll(".panel-tabset-tabby")
 | 
			
		||||
      tabsets.forEach(function(tabset) {
 | 
			
		||||
        const tabby = new Tabby('#' + tabset.id);
 | 
			
		||||
      });
 | 
			
		||||
      const isCodeAnnotation = (el) => {
 | 
			
		||||
        for (const clz of el.classList) {
 | 
			
		||||
          if (clz.startsWith('code-annotation-')) {                     
 | 
			
		||||
            return true;
 | 
			
		||||
          }
 | 
			
		||||
        }
 | 
			
		||||
        return false;
 | 
			
		||||
      }
 | 
			
		||||
      const onCopySuccess = function(e) {
 | 
			
		||||
        // button target
 | 
			
		||||
        const button = e.trigger;
 | 
			
		||||
        // don't keep focus
 | 
			
		||||
        button.blur();
 | 
			
		||||
        // flash "checked"
 | 
			
		||||
        button.classList.add('code-copy-button-checked');
 | 
			
		||||
        var currentTitle = button.getAttribute("title");
 | 
			
		||||
        button.setAttribute("title", "已复制");
 | 
			
		||||
        let tooltip;
 | 
			
		||||
        if (window.bootstrap) {
 | 
			
		||||
          button.setAttribute("data-bs-toggle", "tooltip");
 | 
			
		||||
          button.setAttribute("data-bs-placement", "left");
 | 
			
		||||
          button.setAttribute("data-bs-title", "已复制");
 | 
			
		||||
          tooltip = new bootstrap.Tooltip(button, 
 | 
			
		||||
            { trigger: "manual", 
 | 
			
		||||
              customClass: "code-copy-button-tooltip",
 | 
			
		||||
              offset: [0, -8]});
 | 
			
		||||
          tooltip.show();    
 | 
			
		||||
        }
 | 
			
		||||
        setTimeout(function() {
 | 
			
		||||
          if (tooltip) {
 | 
			
		||||
            tooltip.hide();
 | 
			
		||||
            button.removeAttribute("data-bs-title");
 | 
			
		||||
            button.removeAttribute("data-bs-toggle");
 | 
			
		||||
            button.removeAttribute("data-bs-placement");
 | 
			
		||||
          }
 | 
			
		||||
          button.setAttribute("title", currentTitle);
 | 
			
		||||
          button.classList.remove('code-copy-button-checked');
 | 
			
		||||
        }, 1000);
 | 
			
		||||
        // clear code selection
 | 
			
		||||
        e.clearSelection();
 | 
			
		||||
      }
 | 
			
		||||
      const getTextToCopy = function(trigger) {
 | 
			
		||||
          const codeEl = trigger.previousElementSibling.cloneNode(true);
 | 
			
		||||
          for (const childEl of codeEl.children) {
 | 
			
		||||
            if (isCodeAnnotation(childEl)) {
 | 
			
		||||
              childEl.remove();
 | 
			
		||||
            }
 | 
			
		||||
          }
 | 
			
		||||
          return codeEl.innerText;
 | 
			
		||||
      }
 | 
			
		||||
      const clipboard = new window.ClipboardJS('.code-copy-button:not([data-in-quarto-modal])', {
 | 
			
		||||
        text: getTextToCopy
 | 
			
		||||
      });
 | 
			
		||||
      clipboard.on('success', onCopySuccess);
 | 
			
		||||
      if (window.document.getElementById('quarto-embedded-source-code-modal')) {
 | 
			
		||||
        const clipboardModal = new window.ClipboardJS('.code-copy-button[data-in-quarto-modal]', {
 | 
			
		||||
          text: getTextToCopy,
 | 
			
		||||
          container: window.document.getElementById('quarto-embedded-source-code-modal')
 | 
			
		||||
        });
 | 
			
		||||
        clipboardModal.on('success', onCopySuccess);
 | 
			
		||||
      }
 | 
			
		||||
        var localhostRegex = new RegExp(/^(?:http|https):\/\/localhost\:?[0-9]*\//);
 | 
			
		||||
        var mailtoRegex = new RegExp(/^mailto:/);
 | 
			
		||||
          var filterRegex = new RegExp("https:\/\/drc\.drwater\.net\/course\/public\/RWEP\/PUB");
 | 
			
		||||
        var isInternal = (href) => {
 | 
			
		||||
            return filterRegex.test(href) || localhostRegex.test(href) || mailtoRegex.test(href);
 | 
			
		||||
        }
 | 
			
		||||
        // Inspect non-navigation links and adorn them if external
 | 
			
		||||
     	var links = window.document.querySelectorAll('a[href]:not(.nav-link):not(.navbar-brand):not(.toc-action):not(.sidebar-link):not(.sidebar-item-toggle):not(.pagination-link):not(.no-external):not([aria-hidden]):not(.dropdown-item):not(.quarto-navigation-tool):not(.about-link)');
 | 
			
		||||
        for (var i=0; i<links.length; i++) {
 | 
			
		||||
          const link = links[i];
 | 
			
		||||
          if (!isInternal(link.href)) {
 | 
			
		||||
            // undo the damage that might have been done by quarto-nav.js in the case of
 | 
			
		||||
            // links that we want to consider external
 | 
			
		||||
            if (link.dataset.originalHref !== undefined) {
 | 
			
		||||
              link.href = link.dataset.originalHref;
 | 
			
		||||
            }
 | 
			
		||||
          }
 | 
			
		||||
        }
 | 
			
		||||
      function tippyHover(el, contentFn, onTriggerFn, onUntriggerFn) {
 | 
			
		||||
        const config = {
 | 
			
		||||
          allowHTML: true,
 | 
			
		||||
          maxWidth: 500,
 | 
			
		||||
          delay: 100,
 | 
			
		||||
          arrow: false,
 | 
			
		||||
          appendTo: function(el) {
 | 
			
		||||
              return el.closest('section.slide') || el.parentElement;
 | 
			
		||||
          },
 | 
			
		||||
          interactive: true,
 | 
			
		||||
          interactiveBorder: 10,
 | 
			
		||||
          theme: 'light-border',
 | 
			
		||||
          placement: 'bottom-start',
 | 
			
		||||
        };
 | 
			
		||||
        if (contentFn) {
 | 
			
		||||
          config.content = contentFn;
 | 
			
		||||
        }
 | 
			
		||||
        if (onTriggerFn) {
 | 
			
		||||
          config.onTrigger = onTriggerFn;
 | 
			
		||||
        }
 | 
			
		||||
        if (onUntriggerFn) {
 | 
			
		||||
          config.onUntrigger = onUntriggerFn;
 | 
			
		||||
        }
 | 
			
		||||
          config['offset'] = [0,0];
 | 
			
		||||
          config['maxWidth'] = 700;
 | 
			
		||||
        window.tippy(el, config); 
 | 
			
		||||
      }
 | 
			
		||||
      const noterefs = window.document.querySelectorAll('a[role="doc-noteref"]');
 | 
			
		||||
      for (var i=0; i<noterefs.length; i++) {
 | 
			
		||||
        const ref = noterefs[i];
 | 
			
		||||
        tippyHover(ref, function() {
 | 
			
		||||
          // use id or data attribute instead here
 | 
			
		||||
          let href = ref.getAttribute('data-footnote-href') || ref.getAttribute('href');
 | 
			
		||||
          try { href = new URL(href).hash; } catch {}
 | 
			
		||||
          const id = href.replace(/^#\/?/, "");
 | 
			
		||||
          const note = window.document.getElementById(id);
 | 
			
		||||
          if (note) {
 | 
			
		||||
            return note.innerHTML;
 | 
			
		||||
          } else {
 | 
			
		||||
            return "";
 | 
			
		||||
          }
 | 
			
		||||
        });
 | 
			
		||||
      }
 | 
			
		||||
      const findCites = (el) => {
 | 
			
		||||
        const parentEl = el.parentElement;
 | 
			
		||||
        if (parentEl) {
 | 
			
		||||
          const cites = parentEl.dataset.cites;
 | 
			
		||||
          if (cites) {
 | 
			
		||||
            return {
 | 
			
		||||
              el,
 | 
			
		||||
              cites: cites.split(' ')
 | 
			
		||||
            };
 | 
			
		||||
          } else {
 | 
			
		||||
            return findCites(el.parentElement)
 | 
			
		||||
          }
 | 
			
		||||
        } else {
 | 
			
		||||
          return undefined;
 | 
			
		||||
        }
 | 
			
		||||
      };
 | 
			
		||||
      var bibliorefs = window.document.querySelectorAll('a[role="doc-biblioref"]');
 | 
			
		||||
      for (var i=0; i<bibliorefs.length; i++) {
 | 
			
		||||
        const ref = bibliorefs[i];
 | 
			
		||||
        const citeInfo = findCites(ref);
 | 
			
		||||
        if (citeInfo) {
 | 
			
		||||
          tippyHover(citeInfo.el, function() {
 | 
			
		||||
            var popup = window.document.createElement('div');
 | 
			
		||||
            citeInfo.cites.forEach(function(cite) {
 | 
			
		||||
              var citeDiv = window.document.createElement('div');
 | 
			
		||||
              citeDiv.classList.add('hanging-indent');
 | 
			
		||||
              citeDiv.classList.add('csl-entry');
 | 
			
		||||
              var biblioDiv = window.document.getElementById('ref-' + cite);
 | 
			
		||||
              if (biblioDiv) {
 | 
			
		||||
                citeDiv.innerHTML = biblioDiv.innerHTML;
 | 
			
		||||
              }
 | 
			
		||||
              popup.appendChild(citeDiv);
 | 
			
		||||
            });
 | 
			
		||||
            return popup.innerHTML;
 | 
			
		||||
          });
 | 
			
		||||
        }
 | 
			
		||||
      }
 | 
			
		||||
    });
 | 
			
		||||
    </script>
 | 
			
		||||
    
 | 
			
		||||
 | 
			
		||||
</body></html>
 | 
			
		||||
@@ -43,7 +43,7 @@ require(learnr)
 | 
			
		||||
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)。
 | 
			
		||||
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。
 | 
			
		||||
 | 
			
		||||
作业模板:[第8次课后作业_模板.qmd](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)
 | 
			
		||||
作业模板:[第8次课后作业_模板.qmd](https://git.drwater.net/course/RWEP/raw/branch/main/SD/20240328_9_课后作业/第8次课后作业_模板.qmd)
 | 
			
		||||
 | 
			
		||||
## 示例代码
 | 
			
		||||
 | 
			
		||||
@@ -62,5 +62,5 @@ require(learnr)
 | 
			
		||||
## 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/")`
 | 
			
		||||
 | 
			
		||||
 
 | 
			
		||||
										
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		Reference in New Issue
	
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