hw02 ready for grading

[hannahdxz]

@vincenzocoia @gvdr @ksedivyhaley @joeybernhardt @mynamedaike @pgonzaleze @derekcho c09380c https://github.com/hannahdxz/STAT545-hw-Dong-Xinzhe/blob/master/hw%2002/hw-02_Rmarkdown.md

[margotgunning]

Hey @hannahdxz ,

Overall, you had a very thorough submission, and did a very good job!

Your initial README in your homework repo was a good addition, and made it a lot easier to get into your homework 2 file. The HW02 README was very informative, and concise. I liked how you said both the issues that you had, and how you solved them.

Your HW02 RMarkdown file was very clean and easy to read because of the clear headings, and note sections you added. Sections 2 and 3 for initial exploration of the gapminder dataset was again very thorough, and you explained all the the variables fully, and your use of graphics for visualization was helpful. In section 4, you explored a lot of different plots! Well done. My favourite was the boxplot of lifeExp and continent because you didn't colour the boxes in with their corresponding outline colour , and the white background made them standout, and very easy to see/interpret. (Also, good job on using piping, and making a density plot).

Lastly, section 6 (I want to do more!) was done very well. Your answer from the first question (filter(gapminder, country == c("Rwanda", "Afghanistan"))) demonstrated that you understood the code, and where it went wrong/how to fix it. In the section where you adapted exercises from the chapters in the “Explore” section of R for Data Science to the Gapminder dataset, I really liked how you added interpretations of the different graphs you made; it made it a lot easier to understand what you were exploring in the dataset.

Overall, you did an excellent job, and demonstrated a good understanding of ggplot, and coding syntax.

Cheers, Margot

[wenzhengzzz]

Overall, you had a straightforward, well organized assignment.

Your README file in your HW reporsitory was easy to navigate with the links for each homework session. The README file for HW02 was also very easy to navigate with links. From your report, I found the markdown cheat sheet was also useful for me. Thank you!

For the markdown part, I like the way you post your headers with number bullets and followed by codes, then answered each questions in a list. But in part 3, section 2, you drew a box plot with quantitative variable life expectancy, while box plot would be more useful to plot a categorical variable, since side by side box plot would give a comparison between different levels of factors. In your section 4, your plots were visually pleasing. In your explore section, you demonstrated a good knowledge of coding syntax .

Well done