R Project files

In this class we finished part 9, and covered about half of part 10 in the dropbox folder. Be sure to unzip if necessary.

Class Video

View last year’s class and materials here.

Muddiest Points

Overall, not too many muddy points today.

Yay!

Survival analysis stuff

Yeah, survival is hard and you really need a real stats course on it first, and then seeing the code will make more sense! It’s why we (and most biostats programs) have a full course called Survival Analysis! If you don’t have time for a class, this tutorial by Dr. Emily C. Zabor is a good place to start.

I added additional references in the suggested reading for class 9, and below.

• Survival Analysis in R Tutorial by Dr. Emily C Zabor
• Survminer survival plot vignette
• UVA’s Survival Workshop materials
• Rview’s Survival Analysis

Debugging

Understandable, I had to go through that very quickly! You can read more about debugging in the Advanced R Debugging chapter.

I really don’t understand embrace, and the double brackets, what does that mean when we have double brackets? also when it was like, }} := {{var}}, why does it need the colon? i just don’t understand what’s going on with these operators and it feels frustrating to me sometimes. not your fault i’m sure you told us about this it’s just not going in my head.

There is a lot going on with tidy evaluation that will take a lot of time to really digest and understand. Basically, the brackets are telling R there’s a column name argument here, so use it as such. The := is telling R to use the argument as the new column name. If you don’t have the {{}}} and colon it won’t work because it won’t know how to interpret the input. Definitely check out the references I included in that section and in the reading, it will help to see more examples!

Clearest Points

I like where we placed the blending of stats and R programming. To me it felt like a breath of fresh air to know how it applied to “real world” data.

ggplot

map2

rmd and knitr options, function stuff with {{embrace}}

survey data

Glad to hear this!

Other notes to me

I’m glad to hear from so many of you that the course was helpful, and that you liked the “stats smorgasbord” of the last couple parts! Thanks for all your very useful feedback throughout the quarter!