{"id":189348,"date":"2023-04-26T10:56:19","date_gmt":"2023-04-26T14:56:19","guid":{"rendered":"https:\/\/ibkrcampus.com\/?p=189348"},"modified":"2023-04-26T10:57:08","modified_gmt":"2023-04-26T14:57:08","slug":"rython-tips-and-tricks-snippets","status":"publish","type":"post","link":"https:\/\/www.interactivebrokers.com\/campus\/ibkr-quant-news\/rython-tips-and-tricks-snippets\/","title":{"rendered":"Rython Tips and Tricks \u2013 Snippets"},"content":{"rendered":"\n<p><em>The article &#8220;Rython Tips and Tricks \u2013 Snippets&#8221; first appeared on <a href=\"https:\/\/eranraviv.com\/rython-tips-tricks-snippets\/\">Eran Raviv&#8217;s blog<\/a>.<\/em><\/p>\n\n\n\n<p>R or Python?&nbsp;<a href=\"https:\/\/eranraviv.com\/r-python-rython\/\" rel=\"noreferrer noopener\" target=\"_blank\">who cares!<\/a>&nbsp;Which editor? now that\u2019s a different story.<\/p>\n\n\n\n<p>I like Rstudio for many reasons. Outside the personal, Rstudio allows you to write both&nbsp;<a href=\"https:\/\/eranraviv.com\/r-python-rython\/\" rel=\"noreferrer noopener\" target=\"_blank\">R + Python = Rython in the same script.<\/a>&nbsp;Apart from that, the editor\u2019s level of complexity is well-balanced, not functionality-overkill like some, nor too simplistic like some others. In this post I share how to save time with snippets (easy in Rstudio). Snippets save time by reducing the amount of typing required, it\u2019s the most convenient way to program copy-pasting into the machine\u2019s memory.<\/p>\n\n\n\n<p>In addition to useful built-ins snippets provided by Rstudio like&nbsp;<code>lib<\/code>&nbsp;or&nbsp;<code>fun<\/code>&nbsp;for R and&nbsp;<code>imp<\/code>&nbsp;or&nbsp;<code>def<\/code>&nbsp;for python, you can write your own snippets. Below are a couple I wrote myself that you might find helpful. But first we start with how to use snippets.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-how-to-use-snippets-in-rstudio\">How to use snippets in Rstudio?<\/h3>\n\n\n\n<p>The following two images are pasted here from&nbsp;<a href=\"https:\/\/owenjonesuob.github.io\/mini-projects\/snippets-in-rstudio\/\" rel=\"noreferrer noopener\" target=\"_blank\">owenjonesuob<\/a>.<\/p>\n\n\n\n<p>To get a list of built-in snippets in Rstudio you go to&nbsp;<em><strong>Tools &gt; global Option &gt; code &gt; edit snippet<\/strong><\/em>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"994\" height=\"872\" data-src=\"\/campus\/wp-content\/uploads\/sites\/2\/2023\/04\/snippets2-eran-raviv-blog-rython.jpg\" alt=\"\" class=\"wp-image-189352 lazyload\" data-srcset=\"https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2023\/04\/snippets2-eran-raviv-blog-rython.jpg 994w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2023\/04\/snippets2-eran-raviv-blog-rython-700x614.jpg 700w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2023\/04\/snippets2-eran-raviv-blog-rython-300x263.jpg 300w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2023\/04\/snippets2-eran-raviv-blog-rython-768x674.jpg 768w\" data-sizes=\"(max-width: 994px) 100vw, 994px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 994px; aspect-ratio: 994\/872;\" \/><\/figure>\n\n\n\n<p>The last three snippets are written by the user. You can see what they do here:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"720\" height=\"404\" data-src=\"\/campus\/wp-content\/uploads\/sites\/2\/2023\/04\/snippetgif1-eran-raviv-blog.gif\" alt=\"\" class=\"wp-image-189354 lazyload\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 720px; aspect-ratio: 720\/404;\" \/><\/figure>\n\n\n\n<p>So for example if you type&nbsp;<code>hh<\/code>&nbsp;and SHIFT+TAB, the two lines defined in the snippets are pasted.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Use case, please<\/h3>\n\n\n\n<p>Indeed. Say you want to add an argument to a function you wrote. The argument is for whether you would like to have the execution time reported or not. Call it&nbsp;<code>report_elapsed<\/code>. Like so:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">my_sum &lt;- function(x){\n  sum(x)\n   Sys.sleep(1)\n}\n# Add the report_elapsed argument \nmy_sum &lt;- function(x, report_elapsed= F){\n  ptm &lt;- proc.time()\n  out &lt;- sum(x)\n  Sys.sleep(1)\n  if(report_elapse) {\n    cat(prettyNum( (proc.time() - ptm)[3]\/60, digits=5), \"mins\", \"\\n\")  \n    }\n  out\n}\nmy_sum(rnorm(100), report_elapsed= T)\n0.016833 mins \n[1] 6.56<\/pre>\n\n\n\n<p>What you can do is to create the snippet&nbsp;<code>timeit<\/code>:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">snippet timeit\n ptm &lt;- proc.time()\n ${1: #your function}\n if(report_elapse) {\n cat(prettyNum( (proc.time() - ptm)[3]\/60, digits=5), \"mins\", \"\\n\") \n }<\/pre>\n\n\n\n<p>Add that snippet to your snippet file. Now each time you want to add an execution time argument (<code>report_elapsed<\/code>) to your function you can wrap it quickly with the necessary lines. Just type&nbsp;<code>timeit<\/code>, SHIFT+TAB and paste your function inside.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Can I do in Python?<\/h3>\n\n\n\n<p>Why not. The snippet is<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">snippet timeit\n tic = time.perf_counter()\n ${1: # your function }\n          if report_elapsed:\n   print(\"{:.3f}\".format(time.perf_counter() - tic), \"seconds\")<\/pre>\n\n\n\n<p>and the function is now (after adding the&nbsp;<code>report_elapsed<\/code>&nbsp;and&nbsp;<code>return(out)<\/code>):<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">def my_sum(x, report_elapsed= False):\n      tic = time.perf_counter()\n      out= sum(x)\n      time.sleep(0.2)\n      if report_elapsed:\n        print(\"{:.3f}\".format(time.perf_counter() - tic), \"seconds\") \n      return(out)<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Footnotes and a couple of good books about coding<\/h3>\n\n\n\n<p>As a footnote, I don\u2019t know where I can find a snippet gallery, but that would be good venue to share community snippets.<\/p>\n","protected":false},"excerpt":{"rendered":"<p> In this post I share how to save time with snippets (easy in Rstudio). Snippets save time by reducing the amount of typing required, it\u2019s the most convenient way to program copy-pasting into the machine\u2019s memory.<\/p>\n","protected":false},"author":186,"featured_media":189360,"comment_status":"open","ping_status":"closed","sticky":true,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[339,343,349,338,341,342],"tags":[806,595,487,508],"contributors-categories":[15168],"class_list":{"0":"post-189348","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-data-science","8":"category-programing-languages","9":"category-python-development","10":"category-ibkr-quant-news","11":"category-quant-development","12":"category-r-development","13":"tag-data-science","14":"tag-python","15":"tag-r","16":"tag-rstudio","17":"contributors-categories-eran-raviv"},"pp_statuses_selecting_workflow":false,"pp_workflow_action":"current","pp_status_selection":"publish","acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.9 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Rython Tips and Tricks \u2013 Snippets | IBKR Quant<\/title>\n<meta name=\"description\" content=\"In this post I share how to save time with snippets (easy in Rstudio). 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