geom_text_contour isn't showing labels

[symbalex]

Hi, when I follow the example in ?geom_text_contour

library(ggplot2)
library(metR)

v <- reshape2::melt(volcano)
g <- ggplot(v, aes(Var1, Var2)) +
  geom_contour(aes(z = value))
g + geom_text_contour(aes(z = value))

I get the following warning messages and the plot doesn't display any contour labels. Possibly related to https://github.com/eliocamp/metR/issues/138 but I can't read it!

Warning: namespace ‘cachem’ is not available and has been replaced
by .GlobalEnv when processing object ‘<unknown>’
Warning message:
Computation failed in `stat_text_contour()`:
could not find function "validate_key" 

I have the most up-to-date versions of metR and ggplot2.

> devtools::session_info()
─ Session info ───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
 setting  value                       
 version  R version 4.0.3 (2020-10-10)
 os       macOS Catalina 10.15.7      
 system   x86_64, darwin17.0          
 ui       RStudio                     
 language (EN)                        
 collate  en_AU.UTF-8                 
 ctype    en_AU.UTF-8                 
 tz       Australia/Melbourne         
 date     2021-02-19                  

─ Packages ───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
 package     * version date       lib source        
 askpass       1.1     2019-01-13 [1] CRAN (R 4.0.2)
 assertthat    0.2.1   2019-03-21 [1] CRAN (R 4.0.2)
 backports     1.2.1   2020-12-09 [1] CRAN (R 4.0.2)
 callr         3.5.1   2020-10-13 [1] CRAN (R 4.0.2)
 checkmate     2.0.0   2020-02-06 [1] CRAN (R 4.0.2)
 cli           2.3.0   2021-01-31 [1] CRAN (R 4.0.2)
 colorspace    2.0-0   2020-11-11 [1] CRAN (R 4.0.2)
 crayon        1.4.1   2021-02-08 [1] CRAN (R 4.0.2)
 curl          4.3     2019-12-02 [1] CRAN (R 4.0.1)
 data.table    1.13.6  2020-12-30 [1] CRAN (R 4.0.2)
 desc          1.2.0   2018-05-01 [1] CRAN (R 4.0.2)
 devtools      2.3.2   2020-09-18 [1] CRAN (R 4.0.2)
 digest        0.6.27  2020-10-24 [1] CRAN (R 4.0.2)
 dplyr         1.0.4   2021-02-02 [1] CRAN (R 4.0.2)
 ellipsis      0.3.1   2020-05-15 [1] CRAN (R 4.0.2)
 farver        2.0.3   2020-01-16 [1] CRAN (R 4.0.2)
 fastmap       1.0.1   2019-10-08 [1] CRAN (R 4.0.2)
 fs            1.5.0   2020-07-31 [1] CRAN (R 4.0.2)
 generics      0.1.0   2020-10-31 [1] CRAN (R 4.0.2)
 ggplot2     * 3.3.3   2020-12-30 [1] CRAN (R 4.0.2)
 glue          1.4.2   2020-08-27 [1] CRAN (R 4.0.2)
 gtable        0.3.0   2019-03-25 [1] CRAN (R 4.0.2)
 isoband       0.2.3   2020-12-01 [1] CRAN (R 4.0.2)
 jsonlite      1.7.2   2020-12-09 [1] CRAN (R 4.0.2)
 labeling      0.4.2   2020-10-20 [1] CRAN (R 4.0.2)
 lifecycle     1.0.0   2021-02-15 [1] CRAN (R 4.0.2)
 lubridate     1.7.9.2 2020-11-13 [1] CRAN (R 4.0.2)
 magrittr      2.0.1   2020-11-17 [1] CRAN (R 4.0.2)
 memoise       1.1.0   2017-04-21 [1] CRAN (R 4.0.2)
 metR        * 0.9.1   2021-02-07 [1] CRAN (R 4.0.2)
 munsell       0.5.0   2018-06-12 [1] CRAN (R 4.0.2)
 openssl       1.4.3   2020-09-18 [1] CRAN (R 4.0.2)
 pillar        1.4.7   2020-11-20 [1] CRAN (R 4.0.2)
 pkgbuild      1.2.0   2020-12-15 [1] CRAN (R 4.0.2)
 pkgconfig     2.0.3   2019-09-22 [1] CRAN (R 4.0.2)
 pkgload       1.1.0   2020-05-29 [1] CRAN (R 4.0.2)
 plyr          1.8.6   2020-03-03 [1] CRAN (R 4.0.2)
 prettyunits   1.1.1   2020-01-24 [1] CRAN (R 4.0.2)
 processx      3.4.5   2020-11-30 [1] CRAN (R 4.0.2)
 ps            1.5.0   2020-12-05 [1] CRAN (R 4.0.2)
 purrr         0.3.4   2020-04-17 [1] CRAN (R 4.0.2)
 R6            2.5.0   2020-10-28 [1] CRAN (R 4.0.2)
 Rcpp          1.0.6   2021-01-15 [1] CRAN (R 4.0.2)
 remotes       2.2.0   2020-07-21 [1] CRAN (R 4.0.2)
 reshape2      1.4.4   2020-04-09 [1] CRAN (R 4.0.2)
 rlang         0.4.10  2020-12-30 [1] CRAN (R 4.0.2)
 rprojroot     2.0.2   2020-11-15 [1] CRAN (R 4.0.2)
 scales        1.1.1   2020-05-11 [1] CRAN (R 4.0.2)
 secret        1.1.0   2020-05-07 [1] CRAN (R 4.0.2)
 sessioninfo   1.1.1   2018-11-05 [1] CRAN (R 4.0.2)
 stringi       1.5.3   2020-09-09 [1] CRAN (R 4.0.2)
 stringr       1.4.0   2019-02-10 [1] CRAN (R 4.0.2)
 testthat      3.0.2   2021-02-14 [1] CRAN (R 4.0.2)
 tibble        3.0.6   2021-01-29 [1] CRAN (R 4.0.2)
 tidyselect    1.1.0   2020-05-11 [1] CRAN (R 4.0.2)
 usethis       2.0.0   2020-12-10 [1] CRAN (R 4.0.2)
 vctrs         0.3.6   2020-12-17 [1] CRAN (R 4.0.2)
 withr         2.4.1   2021-01-26 [1] CRAN (R 4.0.2)

[eliocamp]

This is the relevant comment: https://github.com/eliocamp/metR/issues/137#issuecomment-776372690

Try reinstalling rlang.

[symbalex]

I restarted my R session and reinstalled rlang (and restarted again to be safe, and also reinstalled ggplot2 and metR to be double safe) but I still have the same issue.

Would you like me to try dev metR or should CRAN be OK?

[eliocamp]

I cannot reproduce this issue using the CRAN version. It still seems like an installation issue with some other package. Perhaps try updating all your packages. If you are on windows bear in mind some of the common problems when updating packages and follow these steps: https://github.com/rstats-wtf/what-they-forgot/issues/62#issuecomment-545038970

[symbalex]

I think you're right. I tried it on my linux box and had no issue. Thanks for helping me

[mattbk]

In case someone has a similar issue without this error, I found that with some contours based on 204 points, I had to use label.placer = label_placer_n(1) to make labels appear.