Portal Data Manipulation Pipes (dplyr)
Download a copy of the
Portal Teaching Database surveys table
and load it into R using read.csv().
Use pipes (%>%) to combine the following operations to manipulate the data.
- Use
mutate(),select(), andfilter()withis.na()to create a new data frame with theyear,species_id, and weight in kilograms of each individual, with no null weights. - Use the
filter()andselect()to get theyear,month,day, andspecies_idcolumns for all of the rows in the data frame wherespecies_idisSH.