part-IV.md

Part IV: Using code to accomplish a task

In this part we will explore Lines 21-66 in the sample code (and maybe more). In these lines the DAACS team performs common analysis techniques including summarising and graphing.

Exercise 1 - summarise(...)

In this exercise we look at L34-35 and the summarise function

1. Run Line 34
2. Explore the result (a new variable named SCVTotalArts)
3. Breakdown how the summarise(...) function works
   • find the documentation using google
   • https://www.rdocumentation.org/packages/dplyr/versions/0.7.8/topics/summarise

Exercise 2 - group_by(...)

Now we explore grouping in our dataset. Warning: This is tricky.

1. Run Line 39
2. Explore the result (a new variable named SCVArtCat)
3. Compare SCVArtCat and SCVTotalArts
4. Compare sum(SCVArtCat$Count) and SCVTotalArts

Exercise 3 - ggplot(...)

Finally we will make a plot to show our data. This is very complicated so we are going to break it down piece by piece.

1. Goto line 49 and follow along

Wrap up Q&A