First R Exercises

Make a new R Project called 1_intro_to_r_homework_YOURNAME (where you fill in your name with underscores). In it, create a markdown folder where you will make a Quarto document for this homework. Make sure you compile your homework. Once done, zip the whole project folder up and submit on Canvas.

On the quarto document, answer the following questions using code blocks but also writing text to explain your answers.

1. Create a vector of 100 randomly distributed numbers between 0 and 100 using the runif() function and save the vector into the variable my_vec. What information does str and summary tell you about my_vec? How do they differ?

2. Try out a little plot. What does hist(my_vec) show you? What information does the helpfile for hist tell you about what you just did?

3. Install a package! Install the ratdat package using install.packages(ratdat). Once you have done that, load the ratdat library using library(ratdat). Please comment out the loading of install.packages() in your code block, as you only need to install once!

4. Ratdat has a data set called complete. Apply the following functions to complete: class, str, summary. What do these three functions tell you about complete? Look at the helpfile for complete - what does it tell you that meshes with the output of the above functions.

5. To run a function from a library without loading is, we use the syntatx name_of_library::function_name() - so library first, ::, and then the function. Use visdat::vis_dat() on complete. What does it tell you? How might this be useful relative to just using the functions from question 4? NOTE: If you do not have the library, you might have to install it with install.packages() again. You can just do this in your console instead of in the quarto document.

6. Same question as 5, but, this time try out skimr::skim() as well as naniar::miss_var_summary() on complete. What do they tell you.

7. I know it’s early, but, if I asked you right now, what kind of data are you thinking about working with for your final project? Give me a brief description of the what it is and what you might want to explore. This isn’t a final thing, but I want you to start dreaming.