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Adding an example of mutate #122

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Adding an example of mutate #122

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14 changes: 14 additions & 0 deletions lessons/Part2.R
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Expand Up @@ -265,6 +265,20 @@ head(sleep_pipe)

## Notice that we didn't need to pass sleep_VIM as the first argument of each function. The piping operator takes care of this for us.

## dplyr is a powerful library that does more than subsetting. We can also use the function mutate() from the dplyr library to create new columns. Recall that we previously made a new column like this
## The $ operator can also be used to create new columns:
## dataframe$new_column <- some operation

## We can do the same thing with dplyr. To demonstrate let's add a new column to our previous pipe

sleep_VIM = read.csv("data/sleep_VIM.csv")

sleep_pipe2 <- sleep_VIM %>%
filter(Exp == 1 & Danger == 2) %>%
select(BodyWgt, BrainWgt) %>%
mutate(NewCol = row_number())
head(sleep_pipe2)

## If you'd like to learn more about how to use dplyr to perform analysis, check out the Data Wrangling in R workshop!

# Section 9: Missing Data
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