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AndreaCirilloAC / r_data_mining

code of R data mining - a data mining crime history √
https://www.packtpub.com/big-data-and-business-intelligence/r-data-mining
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Erratas #2

Open juananpe opened 6 years ago

juananpe commented 6 years ago

p. 146. When obtaining a contingency table of clean_casted_stored_data$default_numeric vector with table() , the book shows these data: 

   ?    0     1
  28   4845  22187

But the xls file from GtiHub shows these values:

  ?     0     1
  6   3007    8516

p. 146. The sentence "What do we with those strange records?" is grammatically incorrect. Shouldn't it be something like "What do we DO with those strange records?"

p.147. If the data from page 146 is updated as suggested, here it should be updated too (the 27032 should be 11523) p.147. Refers to an information box that is placed on next page (this is not a "bug", but I would say "(look at the information box in next page for more information")

p.148 

str(clean_casted_stored_data_validated) >
   str(clean_casted_stored_data_validated)

The first line is a mistake (it is duplicated)

p. 162 (and along the paper book), there are multiple references to colors in the plots, but the paper book is black&white, so it is misleading...

p.170 when talking about the ratio, the last one "ratio > 0" should be "ratio < 0"

p.192 the clean_casted_stored_data_validated_complete is a new variable (!). Is it referring to the dataset built in p. 150? (after the join?)

p. 193
The assignment of column names is wrong. It should be : colnames(clean_casted_stored_data_validated_complete) <- c("corporation", "subsidiary", "previous_default", "customer_agreement", "multiple_country", "default_numeric", "default_flag", "customer_code", "geographic_area", "ROE", "employees", "economic_sector", "ROS", "company_revenues", "commercial_portfolio", "business_unit") (specifically, company_revenues is specially important, because it is the base for the next sections' discussion!)

p. 209 "odel model," <-- Should be "Model, a data frame...." In the same paragraph, it states that default_numeric is the attribute used in lm(). But in page 104 we used default_flag. Either the error is in p. 209 or in p. 104

juananpe commented 6 years ago

Also posted to https://www.packtpub.com/books/content/errata