{"id":92736,"date":"2021-06-23T12:10:32","date_gmt":"2021-06-23T16:10:32","guid":{"rendered":"https:\/\/ibkrcampus.com\/?p=92736"},"modified":"2022-11-21T09:47:40","modified_gmt":"2022-11-21T14:47:40","slug":"financial-data-manipulation-in-dplyr-for-quant-traders-part-v","status":"publish","type":"post","link":"https:\/\/www.interactivebrokers.com\/campus\/ibkr-quant-news\/financial-data-manipulation-in-dplyr-for-quant-traders-part-v\/","title":{"rendered":"Financial Data Manipulation in dplyr for Quant Traders \u2013 Part V"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><em>Join Robot James for a tutorial on how to use mutate() dplyr verb for financial data manipulation. See&nbsp;<a href=\"\/campus\/ibkr-quant-news\/financial-data-manipulation-in-dplyr-for-quant-traders\/\">Part I<\/a>,&nbsp;<a href=\"\/campus\/ibkr-quant-news\/financial-data-manipulation-in-dplyr-for-quant-traders-part-ii\/\">Part II<\/a>,&nbsp;<a href=\"\/campus\/ibkr-quant-news\/financial-data-manipulation-in-dplyr-for-quant-traders-part-iii\/\">Part III<\/a>&nbsp;and <a href=\"\/campus\/ibkr-quant-news\/financial-data-manipulation-in-dplyr-for-quant-traders-part-iv\/\">Part IV<\/a> to &nbsp;set up and load the data<\/em>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-the-mutate-dplyr-verb\">The&nbsp;<code>mutate()<\/code>&nbsp;dplyr verb<\/h3>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" data-src=\"https:\/\/robotwealth.com\/wp-content\/uploads\/sites\/2\/2020\/04\/dplyr-mutate.png\" alt=\"\" class=\"wp-image-22760 lazyload\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">So far we\u2019ve just filtered selected and re-arranged existing data. Now we\u2019re going to look at creating new data.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mutate lets us add variables (columns) to our data. These are usually derived from existing columns.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-add-new-variable-column-for-log-volume-with-mutate\">Add new variable (column) for log volume with&nbsp;<code>mutate()<\/code><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Here we use mutate to add a column called&nbsp;<code>logvolume<\/code>&nbsp;to our data. It is calculated as the log of the&nbsp;<code>volume<\/code>&nbsp;variable.<\/p>\n\n\n\n<p style=\"background-color:#fcfcdb;font-size:11px\" class=\"has-background\">  \nprices %&gt;%<br>\n  mutate(logvolume = log(volume))\n<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1100\" height=\"294\" data-src=\"\/campus\/wp-content\/uploads\/sites\/2\/2021\/06\/dplyr-for-traders-8-robot-wealth-1100x294.png\" alt=\"\" class=\"wp-image-92747 lazyload\" data-srcset=\"https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2021\/06\/dplyr-for-traders-8-robot-wealth-1100x294.png 1100w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2021\/06\/dplyr-for-traders-8-robot-wealth-700x187.png 700w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2021\/06\/dplyr-for-traders-8-robot-wealth-300x80.png 300w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2021\/06\/dplyr-for-traders-8-robot-wealth-768x205.png 768w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2021\/06\/dplyr-for-traders-8-robot-wealth.png 1283w\" data-sizes=\"(max-width: 1100px) 100vw, 1100px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1100px; aspect-ratio: 1100\/294;\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Add new variable (column) for intraday returns with&nbsp;<code>mutate()<\/code><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">In this example, we add a column for the intraday (open to close) simple returns of the stock each day.<\/p>\n\n\n\n<p style=\"background-color:#fcfcdb;font-size:11px\" class=\"has-background\">  \nprices %&gt;%<br>\n  mutate(intradayreturns = close \/ open &#8211; 1)\n<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1100\" height=\"294\" data-src=\"\/campus\/wp-content\/uploads\/sites\/2\/2021\/06\/dplyr-for-traders-9-robot-wealth-1100x294.png\" alt=\"\" class=\"wp-image-92749 lazyload\" data-srcset=\"https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2021\/06\/dplyr-for-traders-9-robot-wealth-1100x294.png 1100w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2021\/06\/dplyr-for-traders-9-robot-wealth-700x187.png 700w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2021\/06\/dplyr-for-traders-9-robot-wealth-300x80.png 300w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2021\/06\/dplyr-for-traders-9-robot-wealth-768x205.png 768w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2021\/06\/dplyr-for-traders-9-robot-wealth.png 1285w\" data-sizes=\"(max-width: 1100px) 100vw, 1100px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1100px; aspect-ratio: 1100\/294;\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Stay tuned for the next installment in which the author will demonstrate the&nbsp;<code><code>summarise()<\/code>&nbsp;dplyr verb<\/code><\/em>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Visit Robot Wealth website to read the full article and download code:\u00a0<a href=\"https:\/\/robotwealth.com\/financial-data-manipulation-in-dplyr-for-quant-traders\/\">https:\/\/robotwealth.com\/financial-data-manipulation-in-dplyr-for-quant-traders\/<\/a><\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Past performance is not indicative of future results.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Any stock, options or futures symbols displayed are for illustrative purposes only and are not intended to portray recommendations.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Join Robot James for a tutorial on how to use mutate() dplyr verb for financial data manipulation.<\/p>\n","protected":false},"author":421,"featured_media":80184,"comment_status":"closed","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[339,343,338,350,341,344,342],"tags":[9390,2535,9188,9925,6591,508,9815],"contributors-categories":[13676],"class_list":["post-92736","post","type-post","status-publish","format-standard","has-post-thumbnail","category-data-science","category-programing-languages","category-ibkr-quant-news","category-quant-asia-pacific","category-quant-development","category-quant-regions","category-r-development","tag-arrange-dplyr-verb","tag-dplyr","tag-filter-dplyr-verb","tag-mutate-dplyr-verb","tag-rstats","tag-rstudio","tag-select-dplyr-verb","contributors-categories-robot-wealth"],"pp_statuses_selecting_workflow":false,"pp_workflow_action":"current","pp_status_selection":"publish","acf":[],"yoast_head":"<!-- This site is optimized 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