{"id":45871,"date":"2020-05-20T10:47:55","date_gmt":"2020-05-20T14:47:55","guid":{"rendered":"https:\/\/ibkrcampus.com\/?p=45871"},"modified":"2022-11-21T09:45:32","modified_gmt":"2022-11-21T14:45:32","slug":"how-to-schedule-r-scripts","status":"publish","type":"post","link":"https:\/\/www.interactivebrokers.com\/campus\/ibkr-quant-news\/how-to-schedule-r-scripts\/","title":{"rendered":"How to Schedule R Scripts"},"content":{"rendered":"\n

Running R with taskscheduleR and cronR<\/strong><\/p>\n\n\n\n

In a previous post, we talked about how to run R from the Windows Task Scheduler<\/a>. This article will talk about two additional approaches to schedule R scripts, including using the taskscheduleR<\/strong> package on Windows and the cronR<\/strong> package for Linux<\/a>. For scheduling Python code, check out this post<\/a>.<\/p>\n\n\n\n

Schedule R scripts with taskscheduleR<\/strong><\/p>\n\n\n\n

Let\u2019s install taskscheduleR<\/strong> using the install.packages<\/em> command.<\/p>\n\n\n\n

\ninstall.packages(“taskscheduleR”)\n<\/p>\n\n\n\n

Next, we just need to load the package to get started.<\/p>\n\n\n\n

\nlibrary(taskscheduleR)\n<\/p>\n\n\n\n

Creating a sample R script to run automatically<\/strong><\/p>\n\n\n\n

Before we do any scheduling, we need to first create a script. We\u2019ll save the code below in a file called \u201ccreate_file.txt\u201d. This script will randomly generate a collection of integers and write them out to a file.<\/p>\n\n\n\n

\nnums <- sample(10000, 100)

\n \nwrite(nums, “sample_nums.txt”)\n<\/p>\n\n\n\n

Using the taskscheduler_create function<\/strong><\/p>\n\n\n\n

Next, in order to schedule the script to run automatically, we need to use the taskscheduler_create<\/em> function. This function takes several arguments, which can be seen below.<\/p>\n\n\n\n

\ntaskscheduler_create(taskname = “test_run”, rscript = “\/path\/to\/file\/create_file.R”,
\n schedule = “ONCE”, starttime = format(Sys.time() + 50, “%H:%M”))\n\n<\/p><\/p>\n\n\n\n

Firstly, we need to give a name to the task we want to create. In this case, we\u2019ll just call our task \u201ctest_run\u201d. Next, we need to specify the R script we want to automatically run. Third, we add the schedule<\/em> parameter, which denotes how frequently we want to run this script. There are several options here, including WEEKLY, DAILY, MONTHLY, HOURLY, and MINUTE. For example, if we want our script to run every day, we would modify our function call like this:<\/p>\n\n\n\n

\ntaskscheduler_create(taskname = “test_run”, rscript = “\/path\/to\/file\/create_file.R”,
\n schedule = “DAILY”, starttime = format(Sys.time() + 50, “%H:%M”))\n<\/p>\n\n\n\n

The other parameter we need to select is start time. In our examples, we\u2019re setting the task to start in 50 seconds from the current time.<\/p>\n\n\n\n

In addition to these arguments, taskscheduler_create<\/em> also has a parameter called \u201cmodifier\u201d. This allows us to modify the schedule frequency. For example, what if we want to run the task every 2 hours? In this case, we would just set modifier = 2.<\/p>\n\n\n\n

\ntaskscheduler_create(taskname = “test_run”, rscript = “\/path\/to\/file\/create_file.R”,
\n schedule = “HOURLY”, starttime = format(Sys.time() + 50, “%H:%M”), modifier = 2)\n\n<\/p>\n\n\n\n

Similarly, we could run our script every 10 minutes using the code below, with a modifier of 10.<\/p>\n\n\n\n

\ntaskscheduler_create(taskname = “test_run”, rscript = “\/path\/to\/file\/create_file.R”,
\n schedule = “MINUTE”, starttime = format(Sys.time() + 50, “%H:%M”), modifier = 10)\n<\/p>\n\n\n\n

Passing arguments to the Task Scheduler<\/strong><\/p>\n\n\n\n

We can pass arguments to the scheduled task using the \u201crscript_args\u201d parameter.<\/p>\n\n\n\n

\ntaskscheduler_create(taskname = “test_run”, rscript = “\/path\/to\/file\/create_file.R”,
\n schedule = “MINUTE”, starttime = format(Sys.time() + 50, “%H:%M”), modifier = 10,
\n rscript_args = c(“10”, “test”, “this”))\n\n<\/p>\n\n\n\n

Listing the tasks in the scheduler<\/strong><\/p>\n\n\n\n

What if we want to look at all the tasks currently in the task scheduler? There\u2019s a quick method for that called taskscheduler_ls<\/em>.<\/p>\n\n\n\n

\ntaskscheduler_ls()\n<\/p>\n\n\n\n

Running this function returns a data frame of all the tasks currently in the task scheduler.<\/p>\n\n\n\n

\n\n\n\n

Passing arguments to cronR<\/strong><\/p>\n\n\n\n

Running an R script with command line arguments is a common need. This can be handled with cronR<\/strong> using the \u201crscript_args\u201d parameter in the cron_rscript<\/em> function.<\/p>\n\n\n\n

\ncmd <- cron_rscript(\"\/path\/to\/file\/create_file.R\", rscript_args = c(\"10\", \"test\", \"this\"))

\n \ncron_add(command = cmd, frequency = ‘\/30 * * * *’, at = “15:00” , id = ‘test_linux_run’, description = “testing linux scheduler”)\n\n<\/p>\n\n\n\n

Visit TheAutomatic.net to download ready-to-use code, and read the rest of the article: https:\/\/theautomatic.net\/2020\/05\/12\/how-to-schedule-r-scripts\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Andrew Treadway showcases running R with taskscheduleR and cronR packages. Get ready-to-use code for using the taskscheduler_create function.<\/p>\n","protected":false},"author":388,"featured_media":45923,"comment_status":"closed","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[339,343,338,341,352,344,342],"tags":[7629,6956,806,4922,487,6591,508,7628],"contributors-categories":[13695],"class_list":{"0":"post-45871","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-ibkr-quant-news","10":"category-quant-development","11":"category-quant-north-america","12":"category-quant-regions","13":"category-r-development","14":"tag-cronr","15":"tag-data-analysis","16":"tag-data-science","17":"tag-econometrics","18":"tag-r","19":"tag-rstats","20":"tag-rstudio","21":"tag-taskscheduler","22":"contributors-categories-theautomatic-net"},"pp_statuses_selecting_workflow":false,"pp_workflow_action":"current","pp_status_selection":"publish","acf":[],"yoast_head":"\nHow to Schedule R Scripts | IBKR Quant<\/title>\n<meta name=\"description\" content=\"Andrew Treadway showcases running R with taskscheduleR and cronR packages. 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