## Known Errors

Last updated January 30, 2019

### To be fixed for the third printing

• Page 37: The end of the last sentence should read “corresponds to a value of 30 roadways per unit area” (mhilton)
• Page 91: The key for the Google spreadsheet has changed. Try hiv_key <- "1kWH_xdJDM4SMfT_Kzpkk-1yuxWChfurZuWYjfmv51EA" instead. (mwan)
• Page 156: “We can compare this to a (hypothetical) sample of size $$n = 1,000$$” should be “We can compare this to a (hypothetical) sample of size $$n = 200$$” (zzhang)
• Page 378: “The diameter of a graph is the length of the longest geodesic between any [two] pairs of vertices.” The word “two” should be removed. (agary)
• Page 379: A parenthesis is missing after “(see Figure 16.1”. (bbaumer)

### Fixed for the second printing

• Page 10: The last sentence should start “It also seems clear” instead of “In also seems clear”. (voberholzer)
• Page 36: In the caption to Figure 3.4, it should read “roadways is mapped to size”, instead of “educ is mapped to size.” (gmontoya)
• Page 65: The filter() command on the start variable at the bottom of the page does not work as intended. The argument should be start > "1973-01-01". (sschmidt)
• Page 90: At the end of Exercise 4.16, the following sentence should be added: “Use the Births78 data set from the mosaicData package as a reference.” (nhorton/bbaumer)
• Page 214: It’s not clear where Votes_wide comes from. It’s shown in Table 9.1 and the code to generate it is (lkaganovskiy):

library(mdsr)
tidyr::spread(key = bill, value = vote)
• Page 375: Exercise 15.4 should read: “Find all of the adjectives in one of Shakespeare’s plays that end in more or less.” (nhorton/bbaumer)
• Page 375: Exercise 15.5 should read: “Find all of the lines containing the stage direction Exit or Exeunt in one of Shakespeare’s plays.” (nhorton/bbaumer)
• Page 399: Lambert Conformal Conic projection is misspelled. (nhorton)
• Page 465: The residuals should be defined as $$\hat{\epsilon}_i = y_i - \hat{y}_i$$. (alanarnholt)

## BibTeX entry

@book{baumer2017mdsr,
title={{Modern Data Science with R}},
author={Benjamin S. Baumer and Daniel T. Kaplan and Nicholas J. Horton},
year={2017},
month={2},
day={10},
publisher={Chapman and Hall/CRC Press: Boca Raton},
isbn={9781498724487},
url={https://www.crcpress.com/Modern-Data-Science-with-R/Baumer-Kaplan-Horton/9781498724487}
}