title: "Data Manipulation" output: github_document --- ```{r setup, echo = FALSE, message = FALSE} library(tidyverse) ``` This document will show how to *manipulate* data. Import the two datasets that we're going to manipulate. ```{r} litters_df = read_csv("data/FAS_litters.csv", na = c("NA", "", ".")) litters_df = janitor::clean_names(litters_df) pups_df = read_csv("data/FAS_pups.csv", na = c("NA", "", ".")) pups_df = janitor::clean_names(pups_df) ``` ## `select` Use `select()` to select variables ```{r} select(litters_df, group, litter_number, gd0_weight) ``` ```{r} select(litters_df, group:gd18_weight) ``` ```{r} select(litters_df, -pups_survive) ``` ```{r} select(litters_df, -(group:gd18_weight)) ``` ```{r} select(litters_df, starts_with("gd")) select(litters_df, contains("pups")) ```