Homework 5 is ready to be marked

[Jennica416]

My assignment can be found here.

[zxkathy]

Hi, Jennica, this is Kathy who is reviewing your HW5. Here are my comments

• Great workflow in general. I really appreciate you made it quite clear and ready to read. For each task, you clearly state what you are going to achieve, how you did it, and what you found. This is especially clear when you put the contrast together(i.e. doing task 3). In general, your code is neat and graphs are easy to understand.
• Good exploration of factor levels and ordering. For each exploration, you tried to add graph that matches your exploration. For File I/O part, I notice you only did write_csv()/read_csv() part and conclude that it does not preserve the factor levels. Yes, that is right! But if you can explore saveRDS()/readRDS(), or dput()/dget(). You will find these amazing saving file methods can do what write_csv()/read_csv() can't do.
• You can summarize some points from Dr. Munzner's lectures and did a beautiful plot containing some information. Just curious, what was the plot like before you read the lectures?
• You have made your repo quite clear and clean. Your main README file is contains links to every homework and a brief intro to the contents and main functions used in each homework.
• A little display issue for the text after graph, but I am sure that this does not affect your quality of homework.

[ksedivyhaley]

Factor management (drop & reorder): Yes File I/O (data): Yes (only csv) Visualization design: Yes File I/O (write figure): Yes Organized GitHub: Yes Bonus (more forcats, eg relevel): No Reflection: No

Comments:

• Nice use of subfolder to save your HW-5 files
• Try adding READMEs to your homework folders
• What happens to the levels of continent after you have filtered out Oceania but before using droplevels()?
• The line gap2007$country <- fct_reorder(gap2007$country, gap2007$gdpPercap, fun = min) can be re-written using mutate. The fun = min argument is also non-functional since you have only one data point for each country – thus it's not really meaningful to order by the country's minimum GDP value.
• You don't need to use getwd() to use write_csv() - if you're saving something in the working directory then you can just give write_csv() the file name. (You can put it in a subfolder like with the figures, though!)
• Try saveRDS()/readRDS() or dput()/dget().
• Interesting use of line width (size) – and good description of the meaning of hue as an element of colour. To improve the visualization, try re-ordering your factor for the legend, or choosing a new colour scheme.

Your mark will be distributed later. If you would like more feedback, please feel free to message me on slack.

[diermc]

Hi @Jennica416,

Sorry for the late peer-review I was away at a conference this past week and just flew in this morning (Vincenzo gave me an extension)

Overall your assignment was solid. Great reflections, here are some more details following the rubric.

Coding style -great, very well commented

Coding strategy -nice breakdown of parts used in your code, easy to follow and understand

Presentation: graphs -visuals in task 2 are clean but you could have been more creative with your figure choice, but it does get the point of increasing with year across still so well done. -task 3 is good, but there are so many styles that would have made the pattern with the continents easier to see, such as using plot type geom_density_2d and ordering the countries for increasing order of life expectancy to make the line increasing or by continent to group their data from ind countries together in a final version. -awesome visualization design figures!

Presentation: tables -excellent! very easy to read. -clearly, extra work was put in to display tables well. -nice formatting!

Achievement, mastery, cleverness, creativity -great explanation of arrange() impacts on ggplot -make sure to leave either two spaces or drop 2 lines after figures to make sure your text doesn't jump to the end of the figure-you could expand to explore saveRDS()/readRDS(), and dput()/dget() -Great visualization design section! -clear explanation of writing figures to files with 2 examples. great!

Ease of access for instructor, compliance with course conventions for submitted work -Nice link to your assignment file in the issue for grading and in the main readme file, plus great description there (even if not in the suggested table format) so they can be easily navigated to.

Awesome work! -Sarah