Publications by Joey Campbell
edamiss17_demo
suppressPackageStartupMessages(library("tidyverse")) package 㤼㸱tidyverse㤼㸲 was built under R version 3.6.3 1. What happens to missing values in a histogram? What happens to missing values in a bar chart? Why is there a difference? Missing values are removed when the number of observations in each bin are calculated. See the warning messa...
2828 sym R (450 sym/8 pcs) 2 img
tidydatacasestudy28
suppressPackageStartupMessages(library("tidyverse")) package 㤼㸱tidyverse㤼㸲 was built under R version 3.6.3 Case Study To finish off this section, let’s pull together everything you’ve learned to tackle a realistic data tidying problem. The tidyr::who dataset contains tuberculosis (TB) cases broken down by year, country, age, gender, ...
21733 sym R (2334 sym/26 pcs) 1 img
charClasses36_demo
suppressPackageStartupMessages(library("tidyverse")) package 㤼㸱tidyverse㤼㸲 was built under R version 3.6.3 1. Create regular expressions to find all words that: 1. Words starting with vowels str_subset(stringr::words, "^[aeiou]") [1] "a" "able" "about" "absolute" "accept" "account" [7] "achieve" ...
7123 sym R (3968 sym/21 pcs)
fact_lvl_mod48_demo
suppressPackageStartupMessages(library("tidyverse")) package 㤼㸱tidyverse㤼㸲 was built under R version 3.6.3 1. How have the proportions of people identifying as Democrat, Republican, and Independent changed over time? To answer that, we need to combine the multiple levels into Democrat, Republican, and Independent levels(gss_cat$partyid) ...
2904 sym R (1784 sym/8 pcs) 2 img
detectMatch38_demo
suppressPackageStartupMessages(library("tidyverse")) package 㤼㸱tidyverse㤼㸲 was built under R version 3.6.3 1. For each of the following challenges, try solving it by using both a single regular expression, and a combination of multiple str_detect() calls. Find all words that start or end with x. Find all words that start with a vowel and...
4619 sym R (1490 sym/21 pcs)
for_loop_variation60_demo
suppressPackageStartupMessages(library("tidyverse")) package 㤼㸱tidyverse㤼㸲 was built under R version 3.6.3 suppressPackageStartupMessages(library("stringr")) #The package microbenchmark is used for timing code. suppressPackageStartupMessages(library("microbenchmark")) package 㤼㸱microbenchmark㤼㸲 was built under R version 3.6.3 1...
8048 sym R (3284 sym/41 pcs)
loopsvfuncs61_demo
suppressPackageStartupMessages(library("tidyverse")) package 㤼㸱tidyverse㤼㸲 was built under R version 3.6.3 suppressPackageStartupMessages(library("stringr")) #The package microbenchmark is used for timing code. suppressPackageStartupMessages(library("microbenchmark")) package 㤼㸱microbenchmark㤼㸲 was built under R version 3.6.3 1...
5388 sym R (2405 sym/22 pcs)
formulas_model_fam66_demo
suppressPackageStartupMessages(library("tidyverse")) package 㤼㸱tidyverse㤼㸲 was built under R version 3.6.3 suppressPackageStartupMessages(library("modelr")) package 㤼㸱modelr㤼㸲 was built under R version 3.6.3 1. What happens if you repeat the analysis of sim2 using a model without an intercept. What happens to the model equation? ...
13308 sym R (2985 sym/28 pcs) 2 img
flights68_demo
suppressPackageStartupMessages(library("tidyverse")) suppressPackageStartupMessages(library("modelr")) suppressPackageStartupMessages(library("lubridate")) suppressPackageStartupMessages(library("broom")) suppressPackageStartupMessages(library("nycflights13")) suppressPackageStartupMessages(library("splines")) This code is copied from the bo...
20972 sym R (10642 sym/23 pcs) 12 img
creating_list_columns69_demo
suppressPackageStartupMessages(library("modelr")) package 㤼㸱modelr㤼㸲 was built under R version 3.6.3 suppressPackageStartupMessages(library("tidyverse")) package 㤼㸱tidyverse㤼㸲 was built under R version 3.6.3 suppressPackageStartupMessages(library("gapminder")) package 㤼㸱gapminder㤼㸲 was built under R version 3.6.3 1. List ...
4030 sym R (1869 sym/25 pcs)