6 Setup: Packages
Purpose: Every time you start an analysis, you will need to load packages. This is a quick warmup to get you in this habit.
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Note: If you open this .Rmd file in RStudio you can execute the chunks of code (stuff between triple-ticks) by clicking on the green arrow to the top-right of the chunk, or by placing your cursor within a chunk (between the ticks) and pressing Ctrl + Shift + Enter. See here for a brief introduction to RMarakdown files. Note that in RStudio you can Shift + Click (CMD + Click) to follow a link.
6.0.1 q1 Create a new code chunk and prepare to load the tidyverse.
In RStudio use the shortcut
Ctrl + Alt + I (Cmd + Option + I on Mac). Type the command
library(tidyverse).
## ── Attaching packages ─────────────────────────────────────── tidyverse 1.3.0 ──## ✔ ggplot2 3.4.0 ✔ purrr 1.0.1
## ✔ tibble 3.1.8 ✔ dplyr 1.0.10
## ✔ tidyr 1.2.1 ✔ stringr 1.5.0
## ✔ readr 2.1.3 ✔ forcats 0.5.2## ── Conflicts ────────────────────────────────────────── tidyverse_conflicts() ──
## ✖ dplyr::filter() masks stats::filter()
## ✖ dplyr::lag() masks stats::lag()Make sure to load packages at the beginning of your notebooks! This is a best-practice.
6.0.2 q2 Run the chunk with library(tidyverse). What packages are loaded?
In
RStudio
press Ctrl + Alt + T (Cmd + Option + T on Mac) to run the code chunk at your
cursor.
ggplot2, tibble, tidyr, readr, purrr, dplyr, stringr, forcats
6.0.3 q3 What are the main differences between install.packages() and library()? How often do you need to call each one?
install.packages() downloads and installs packages into R’s library of
packages on your computer. After a package is installed, it is available for
use, but not loaded to use. library() loads a package from the library for
use. The package remains loaded until your session ends, such as when you
quit R. You only need to call install.packages() once. You need to call
library() for each new session.
Packages are frequently updated. You can check for updates and update your packages by using the Update button in the Packages tab of RStudio (lower right pane).