---
title: "My Document"
execute:
echo: true
---
Homework 8
Instructions
Answer each of the following questions. Be sure to display all your code in the rendered version (use echo: true
throughout1).
1 You can make this a global option for your whole document by putting it directly in the YAML of your qmd:
Exercises
Question 1:
Given a vector of birthdates2, write a function to compute the age in years3.
2 Assume mdy
format for this vector.
3 Depending upon how you want to solve this problem, the lubridate functions today()
and time_length()
could be useful here :)
Question 2:
For each of the following functions list all arguments that use tidy evaluation and describe whether they use data-masking or tidy-selection: distinct()
, count()
, group_by()
4, rename_with()
, slice_min()
, slice_sample()
.
4 Note: group_by()
doesn’t list what type of tidy evaluation it uses for its ...
argument but you can find the answer in the introduction to this article.
Question 3:
Build up a rich plotting function by incrementally implementing each of the steps below:
- Draw a scatterplot given
dataset
andx
andy
variables. - Add a line of best fit (i.e. a linear model with no standard errors)5.
- Add a title that includes the names of the variables used.
5 geom_smooth()
has a method
and se
argument that will be necessary to specify here.
Test your function with the built-in cars
, swiss
, and iris
datasets.
Due Dates
# | Homework Due | Peer Review Due |
---|---|---|
1 | 7 October | 12 October |
2 | 14 October | 19 October |
3 | 21 October | 26 October |
4 | 28 October | 2 November |
5 | 11 November | 16 November |
6 | 18 November | 21 November |
7 | 25 November | 30 November |
8 | 2 December | 7 December |
9 | 9 December | 14 December |