![]() This approach is useful to sending multiple commands to R at once. Instead of running one line at a time, you can select the entire block with your mouse (comment and all), and then press Run. You should notice that your curser dropped down to the next line. To send code to R, place your curser anywhere on the line to be executed, then press the Run button in the upper right hand portion of your screen. (These color schemes don’t appear in this ebook). Notice that this font is green (by default) in RStudio this helps you quickly differentiate between comments and code. Make sure to paste in the comments too!Ĭomments are not actually executed in R – they are notes that you (the coder!) type to remind yourself of what the code is intended to do. So get the square root of 10 is a comment. In R, lines of code that are preceded by the # symbol are considered “comments”. 14.3.8 Inserting plots into your slideshow.14.3.7 Specifying absolute location on the slide for text or images.14.3.6 Bootstrap widget for cycling images on a slide.14.3.4 Adding a slide background color or image.14.3.1 A quick overview of HTML syntax, and where to store your customizations.13.8.5 Adding Towns from Shapefile Attributed Table.13.8.3 Adding New Columns To A Data Frame.13.8 Creating the Tauntaun Harvest Data CSV File.12.5.5 Documenting the TTestimators-package.12.5.4 Documenting the TauntaunHarvest Dataset.12.1 Load Required Packages and Programs.10.7 Controlling the Output and Metadata.10.5.4 Paragraph 4: Analysis of Age and Sex.10.5.2 Paragraph 2: Tauntaun Data Summary.10.4 Weaving Markdown with R (Section 3).10.3.9 Creating a Bibliography with Endnote.10.3.6 Paragraph 4: Analysis of Harvested Animals by Tauntaun Age and Sex.10.3.5 Paragraph 3: Hunter Demographics.10.3 Tauntaun Annual Report Outline and R Objects Needed (Section 2).10.1 HTML Markup vs. Markdown vs. R Markdown.7.8 Summarizing the Harvest with Aggregate.6.10 Read in the Hunter CSV file, and Save as hunter_clean.RData.6.9 Save the Cleaned Data as harvest_clean.RData.6.8 Stepping through Rows and Columns with Apply Functions.6.7.1 color = fur color of the reptomammalian Tauntaun.6.7 A Brief Interruption to Discuss NA and NULL.6.6.9 weight = weight of harvested animal (arbitrary units).6.6.8 length = length of harvested animal.6.6.7 town = town in which the animal was harvested.6.6.4 individual = the unique identifier of each harvested animal.6.6.3 sex = the sex of the harvested animal.6.6.2 age = the age of the harvested animal.6.6.1 hunter.id = the unique hunter identification number.3.4.7 Function Names from Different Packages.2.3 The Files, Plots, Package, Help Pane.If you get stuck with some syntax (usually, mismatched parentheses or quotes), the R Console will change from the > at the beginning of the line (which means it is waiting for a new command) to the + at the beginning of the line (which means it is waiting for you to finish a command).Rmd file, you can put your cursor on a line and hit Cntrl + Enter to get the code to execute in the Console. If you type mean(~hwy, data=vehicles, and hit tab, it will tell you the other arguments you can use for the mean() function. If you start typing mea and hit tab, it will suggest mean() among other things. The tab key on your keyboard will help you (particularly in RStudio) by offering ways to finish your code.I use this a lot– if I type a function and it didn’t work, I’ll hit the up arrow and edit what I had from before. The up arrow on your keyboard will allow you to scroll up through your past commands.These are not exactly coding tricks, but rather ways to make your life easier using key commands.
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