r4ds build fails at model-building.Rmd

[stuzog]

Attempts to build r4ds consistently fail at model-building.Rmd with this error:

Line 144 Error in overscope_eval_next(overscope, expr) : object 'G' not found

No help from Stack Overflow https://stackoverflow.com/search?q=r+bookdown+%22Execution+halted%22

> devtools::session_info('bookdown')
Session info ---------------------------------------------------------------------------------------
 setting  value                       
 version  R version 3.4.3 (2017-11-30)
 system   x86_64, darwin15.6.0        
 ui       RStudio (1.1.412)           
 language (EN)                        
 collate  en_CA.UTF-8                 
 tz       America/Vancouver           
 date     2018-01-09                  

Packages -------------------------------------------------------------------------------------------
 package   * version date       source                           
 backports   1.1.2   2017-12-13 CRAN (R 3.4.3)                   
 base64enc   0.1-3   2015-07-28 CRAN (R 3.4.0)                   
 bookdown    0.5.15  2018-01-09 Github (rstudio/bookdown@38efc82)
 digest      0.6.13  2017-12-14 CRAN (R 3.4.3)                   
 evaluate    0.10.1  2017-06-24 CRAN (R 3.4.1)                   
 graphics  * 3.4.3   2017-12-07 local                            
 grDevices * 3.4.3   2017-12-07 local                            
 highr       0.6     2016-05-09 CRAN (R 3.4.0)                   
 htmltools   0.3.6   2017-04-28 CRAN (R 3.4.0)                   
 jsonlite    1.5     2017-06-01 CRAN (R 3.4.0)                   
 knitr       1.18    2017-12-27 CRAN (R 3.4.3)                   
 magrittr    1.5     2014-11-22 CRAN (R 3.4.0)                   
 markdown    0.8     2017-04-20 CRAN (R 3.4.0)                   
 methods   * 3.4.3   2017-12-07 local                            
 mime        0.5     2016-07-07 CRAN (R 3.4.0)                   
 Rcpp        0.12.14 2017-11-23 CRAN (R 3.4.3)                   
 rmarkdown   1.8     2017-11-17 CRAN (R 3.4.2)                   
 rprojroot   1.3-2   2018-01-03 CRAN (R 3.4.3)                   
 stats     * 3.4.3   2017-12-07 local                            
 stringi     1.1.6   2017-11-17 CRAN (R 3.4.2)                   
 stringr     1.2.0   2017-02-18 CRAN (R 3.4.0)                   
 tools       3.4.3   2017-12-07 local                            
 utils     * 3.4.3   2017-12-07 local                            
 yaml        2.1.16  2017-12-12 CRAN (R 3.4.3)                   
> rmarkdown::pandoc_version()
[1] ‘1.19.2.1’
> system('pdflatex --version')
pdfTeX 3.14159265-2.6-1.40.18 (TeX Live 2017)
kpathsea version 6.2.3
Copyright 2017 Han The Thanh (pdfTeX) et al.
There is NO warranty.  Redistribution of this software is
covered by the terms of both the pdfTeX copyright and
the Lesser GNU General Public License.
For more information about these matters, see the file
named COPYING and the pdfTeX source.
Primary author of pdfTeX: Han The Thanh (pdfTeX) et al.
Compiled with libpng 1.6.29; using libpng 1.6.29
Compiled with zlib 1.2.11; using zlib 1.2.11
Compiled with xpdf version 3.04
> 
> 

[yihui]

Please consult the book authors first, since I'm not very familiar with the content of this book, and I have no idea what G is in this case. You may come back if it turns out to be a bug of bookdown. Thanks!

[stuzog]

Thanks, yihui. The error was in the model-building.Rmd file, solution is to replace:

grid <- diamonds2 %>%
data_grid(cut, .model = mod_diamond2) %>%
add_predictions(mod_diamond2)

with this:

grid <- diamonds2 %>%
data_grid(cut, lcarat = -0.515, color = "G", clarity = "SI1") %>%
add_predictions(mod_diamond2)

See:

hadley/r4ds#608
and
tidyverse/modelr#58

Stuart

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