日期格式化
既然你的報告已經加入更多高層次的細節，你也想用不同格式來顯示日期。請務必參考下方影片中的日期格式選項表。
本練習屬於課程
使用 R Markdown 製作報告
練習說明
- 在 YAML 標頭中使用
Sys.time()函式修改日期，讓日期顯示為十進位日、完整月份名稱與四位數年份，例如：08 April 2020。
動手互動練習
試著完成這個範例程式碼，體驗一下這個練習。
{"investment_report.Rmd":"---\ntitle: \"Investment Report\"\nauthor: \"Add your name\"\ndate: \"`r format(___, '___')`\"\noutput: html_document\n---\n\n```{r data, include = FALSE}\nlibrary(readr)\n\ninvestment_annual_summary <- read_csv(\"https://assets.datacamp.com/production/repositories/5756/datasets/d0251f26117bbcf0ea96ac276555b9003f4f7372/investment_annual_summary.csv\")\ninvestment_services_projects <- read_csv(\"https://assets.datacamp.com/production/repositories/5756/datasets/78b002735b6f620df7f2767e63b76aaca317bf8d/investment_services_projects.csv\")\n```\n\n\n## Datasets \n\n### Investment Annual Summary\n\nThe `investment_annual_summary` dataset provides a summary of the dollars in millions provided to each region for each fiscal year, from 2012 to 2018.\n```{r}\ninvestment_annual_summary\n```\n\n### Investment Services Projects\n\nThe `investment_services_projects` dataset provides information about each investment project from the 2012 to 2018 fiscal years. Information listed includes the project name, company name, sector, project status, and investment amounts.\n```{r}\ninvestment_services_projects \n```\n\n\n"}