Learning Objectives

Following this assignment students should be able to:

Collaborate with others using git

Reading

• Git basics in RStudio

• Visiting Speaker: Kait Farrell (Rosemond Lab)

The Atlassian website has some good tutorials and sometimes helpful conceptual diagrams that you may want to check out.

Lecture Notes

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Exercises

1. -- Pulling and Pushing --

   This is a follow up to Pushing Changes.

   STOP: Wait until your teacher has told you they’ve updated your repository following the last exercise before doing this one.

   While you were working on your vectorized GC-content function, Dr. Granger (who has suddenly developed some pretty impressive computational skills) has been writing a vectorized ear length categorizer. To get it you’ll need to pull the most recent changes from Github.

   1. On the Git tab click on the Pull button with the blue arrow. You should see some text that looks like:

      From github.com:ethanwhite/gryffindorforever
         1e24ac8..815e600  master     -> origin/master
      Updating 1e24ac8..815e600
      Fast-forward
       testme.txt | 1 +
       1 file changed, 1 insertion(+)
      create mode 100644 youareawesome.txt
      

   2. Click OK.

   3. You should see the new function in your repository.

      get_size_class <- function(ear_length){
         # Calculate the size class for one or more earth lengths
         ear_lengths <- ifelse(ear_length > 10, "large", "small")
         return(ear_lengths)
      }
      

   4. Write some new code that creates a data frame with information about the individual ID, the earth length class, and the gc-content for each individual.
   5. Save this data frame as a csv file using write.csv()
   6. Commit the new code and the resulting csv file and push the results to Github.

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Hopefully the assignment above will give you some flavor of what it is like collaborating with others using Git. Kait will be visiting class to help us go through her collaboration workflow.