tidy.drc does not calculate confidence intervals

[nlubock]

The tidy.drc function returns NA's for the confidence interval estimates.

Attempting the example from the documentation:

library(drc)
library(broom)
library(tidyverse)

mod <- drm(dead/total~conc, type, 
           weights = total, data = selenium, fct = LL.2(), type = "binomial")

tidy(mod)

# A tibble: 8 x 6
  term  curve estimate std.error statistic  p.value
  <chr> <chr>    <dbl>     <dbl>     <dbl>    <dbl>
1 b     1       -1.50      0.155     -9.67 2.01e-22
2 b     2       -0.843     0.139     -6.06 1.35e- 9
3 b     3       -2.16      0.138    -15.7  1.65e-55
4 b     4       -1.45      0.169     -8.62 3.41e-18
5 e     1      252.       13.8       18.2  1.16e-74
6 e     2      378.       39.4        9.61 3.53e-22
7 e     3      120.        5.91      20.3  1.14e-91
8 e     4       88.8       8.62      10.3  3.28e-25

tidy(mod, conf.int = TRUE)

# A tibble: 8 x 8
  term  curve estimate std.error statistic  p.value conf.low conf.high
  <chr> <chr>    <dbl>     <dbl>     <dbl>    <dbl>    <dbl>     <dbl>
1 b     1       -1.50      0.155     -9.67 2.01e-22       NA        NA
2 b     2       -0.843     0.139     -6.06 1.35e- 9       NA        NA
3 b     3       -2.16      0.138    -15.7  1.65e-55       NA        NA
4 b     4       -1.45      0.169     -8.62 3.41e-18       NA        NA
5 e     1      252.       13.8       18.2  1.16e-74       NA        NA
6 e     2      378.       39.4        9.61 3.53e-22       NA        NA
7 e     3      120.        5.91      20.3  1.14e-91       NA        NA
8 e     4       88.8       8.62      10.3  3.28e-25       NA        NA

Relevant session info:

R version 3.6.0 (2019-04-26)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Debian GNU/Linux 9 (stretch)

Matrix products: default
BLAS/LAPACK: /usr/lib/libopenblasp-r0.2.19.so

locale:
 [1] LC_CTYPE=C.UTF-8       LC_NUMERIC=C           LC_TIME=C.UTF-8        LC_COLLATE=C.UTF-8     LC_MONETARY=C.UTF-8   
 [6] LC_MESSAGES=C          LC_PAPER=C.UTF-8       LC_NAME=C              LC_ADDRESS=C           LC_TELEPHONE=C        
[11] LC_MEASUREMENT=C.UTF-8 LC_IDENTIFICATION=C   

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
 [1] forcats_0.4.0    stringr_1.4.0    dplyr_0.8.3      purrr_0.3.2      readr_1.3.1      tidyr_0.8.3     
 [7] tibble_2.1.3     ggplot2_3.2.0    tidyverse_1.2.1  broom_0.5.2.9002 drc_3.0-1        MASS_7.3-51.4   

loaded via a namespace (and not attached):
 [1] httr_1.4.0        jsonlite_1.6      splines_3.6.0     carData_3.0-2     modelr_0.1.4      gtools_3.8.1     
 [7] assertthat_0.2.1  cellranger_1.1.0  pillar_1.4.2      backports_1.1.4   lattice_0.20-38   glue_1.3.1       
[13] digest_0.6.20     rvest_0.3.4       colorspace_1.4-1  sandwich_2.5-1    htmltools_0.3.6   Matrix_1.2-17    
[19] clipr_0.6.0       pkgconfig_2.0.2   haven_2.1.1       mvtnorm_1.0-11    scales_1.0.0      processx_3.4.0   
[25] whisker_0.3-2     openxlsx_4.1.0.1  rio_0.5.16        generics_0.0.2    car_3.0-3         ellipsis_0.2.0.1 
[31] withr_2.1.2       TH.data_1.0-10    lazyeval_0.2.2    cli_1.1.0         survival_2.44-1.1 magrittr_1.5     
[37] crayon_1.3.4      readxl_1.3.1      evaluate_0.14     ps_1.3.0          fansi_0.4.0       fs_1.3.1         
[43] xml2_1.2.0        foreign_0.8-71    tools_3.6.0       data.table_1.12.2 hms_0.4.2         multcomp_1.4-10  
[49] munsell_0.5.0     reprex_0.3.0      plotrix_3.7-6     zip_2.0.3         callr_3.3.0       compiler_3.6.0   
[55] rlang_0.4.0       grid_3.6.0        rstudioapi_0.10   rmarkdown_1.13    gtable_0.3.0      codetools_0.2-16 
[61] abind_1.4-5       curl_3.3          R6_2.4.0          zoo_1.8-6         lubridate_1.7.4   knitr_1.23       
[67] zeallot_0.1.0     utf8_1.1.4        stringi_1.4.3     Rcpp_1.0.1        vctrs_0.1.0       tidyselect_0.2.5 
[73] xfun_0.8  

[raerickson]

I can recreate the the same error with R 3.6.1 running on macOS:

R version 3.6.1 (2019-07-05)
Platform: x86_64-apple-darwin15.6.0 (64-bit)
Running under: macOS High Sierra 10.13.6

[alexpghayes]

How do you get confidence intervals for these objects normally?

[raerickson]

With the confint() function.

…

On Fri, Dec 13, 2019, 15:27 alex hayes ***@***.***> wrote: How do you get confidence intervals for these objects normally? — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#798?email_source=notifications&email_token=AC2FUEKB2AQHGLZRBRVUQRLQYP43PA5CNFSM4JXFLEYKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEG3JPRY#issuecomment-565614535>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AC2FUEND7FS4D3FOGH3QIPLQYP43PANCNFSM4JXFLEYA> .

[IndrajeetPatil]

library(drc)
#> Loading required package: MASS
#> 
#> 'drc' has been loaded.
#> Please cite R and 'drc' if used for a publication,
#> for references type 'citation()' and 'citation('drc')'.
#> 
#> Attaching package: 'drc'
#> The following objects are masked from 'package:stats':
#> 
#>     gaussian, getInitial
library(broom)
library(tidyverse)

mod <- drm(dead/total~conc, type, 
           weights = total, data = selenium, fct = LL.2(), type = "binomial")

confint(mod)
#>          2.5 %      97.5 %
#> b:1  -1.808258  -1.1988105
#> b:2  -1.115883  -0.5705842
#> b:3  -2.434489  -1.8925927
#> b:4  -1.783488  -1.1225642
#> e:1 225.155474 279.3556331
#> e:2 301.295321 455.6256335
#> e:3 108.138906 131.2875017
#> e:4  71.917971 105.6926148

^{Created on 2019-12-14 by the reprex package (v0.3.0)}

Session info

devtools::session_info()
#> - Session info ---------------------------------------------------------------
#>  setting  value                       
#>  version  R version 3.6.1 (2019-07-05)
#>  os       Windows 10 x64              
#>  system   x86_64, mingw32             
#>  ui       RTerm                       
#>  language (EN)                        
#>  collate  English_United States.1252  
#>  ctype    English_United States.1252  
#>  tz       Europe/Berlin               
#>  date     2019-12-14                  
#> 
#> - Packages -------------------------------------------------------------------
#>  package     * version    date       lib source                          
#>  abind         1.4-5      2016-07-21 [1] CRAN (R 3.5.0)                  
#>  assertthat    0.2.1      2019-03-21 [1] CRAN (R 3.6.0)                  
#>  backports     1.1.5      2019-10-02 [1] CRAN (R 3.6.1)                  
#>  broom       * 0.5.2.9003 2019-12-14 [1] local                           
#>  callr         3.4.0      2019-12-09 [1] CRAN (R 3.6.1)                  
#>  car           3.0-5      2019-11-15 [1] CRAN (R 3.6.1)                  
#>  carData       3.0-3      2019-11-16 [1] CRAN (R 3.6.1)                  
#>  cellranger    1.1.0      2016-07-27 [1] CRAN (R 3.5.1)                  
#>  cli           2.0.0.9000 2019-12-12 [1] Github (r-lib/cli@ac2c18b)      
#>  codetools     0.2-16     2018-12-24 [1] CRAN (R 3.5.2)                  
#>  colorspace    1.4-1      2019-03-18 [1] CRAN (R 3.6.0)                  
#>  crayon        1.3.4      2017-09-16 [1] CRAN (R 3.5.1)                  
#>  curl          4.3        2019-12-02 [1] CRAN (R 3.6.1)                  
#>  data.table    1.12.8     2019-12-09 [1] CRAN (R 3.6.1)                  
#>  DBI           1.0.0      2018-05-02 [1] CRAN (R 3.5.1)                  
#>  dbplyr        1.4.2      2019-06-17 [1] CRAN (R 3.6.0)                  
#>  desc          1.2.0      2019-11-11 [1] Github (r-lib/desc@61205f6)     
#>  devtools      2.2.1      2019-09-24 [1] CRAN (R 3.6.1)                  
#>  digest        0.6.23     2019-11-23 [1] CRAN (R 3.6.1)                  
#>  dplyr       * 0.8.3.9000 2019-10-10 [1] Github (tidyverse/dplyr@dcfc1d1)
#>  drc         * 3.0-1      2016-08-30 [1] CRAN (R 3.5.2)                  
#>  ellipsis      0.3.0      2019-09-20 [1] CRAN (R 3.6.1)                  
#>  evaluate      0.14       2019-05-28 [1] CRAN (R 3.6.0)                  
#>  fansi         0.4.0      2018-11-05 [1] Github (brodieG/fansi@ab11e9c)  
#>  forcats     * 0.4.0      2019-02-17 [1] CRAN (R 3.5.2)                  
#>  foreign       0.8-71     2018-07-20 [2] CRAN (R 3.6.1)                  
#>  fs            1.3.1      2019-05-06 [1] CRAN (R 3.6.0)                  
#>  generics      0.0.2      2019-03-05 [1] Github (r-lib/generics@c15ac43) 
#>  ggplot2     * 3.2.1      2019-08-10 [1] CRAN (R 3.6.1)                  
#>  glue          1.3.1      2019-03-12 [1] CRAN (R 3.6.0)                  
#>  gtable        0.3.0      2019-03-25 [1] CRAN (R 3.6.0)                  
#>  gtools        3.8.1      2018-06-26 [1] CRAN (R 3.5.0)                  
#>  haven         2.2.0      2019-11-08 [1] CRAN (R 3.6.1)                  
#>  highr         0.8        2019-03-20 [1] CRAN (R 3.6.0)                  
#>  hms           0.5.2      2019-10-30 [1] CRAN (R 3.6.1)                  
#>  htmltools     0.4.0      2019-10-04 [1] CRAN (R 3.6.1)                  
#>  httr          1.4.1      2019-08-05 [1] CRAN (R 3.6.1)                  
#>  jsonlite      1.6        2018-12-07 [1] CRAN (R 3.6.0)                  
#>  knitr         1.26       2019-11-12 [1] CRAN (R 3.6.1)                  
#>  lattice       0.20-38    2018-11-04 [2] CRAN (R 3.6.1)                  
#>  lazyeval      0.2.2      2019-03-15 [1] CRAN (R 3.6.0)                  
#>  lifecycle     0.1.0      2019-08-01 [1] CRAN (R 3.6.1)                  
#>  lubridate     1.7.4      2018-04-11 [1] CRAN (R 3.5.1)                  
#>  magrittr      1.5        2014-11-22 [1] CRAN (R 3.5.1)                  
#>  MASS        * 7.3-51.4   2019-03-31 [1] CRAN (R 3.6.0)                  
#>  Matrix        1.2-18     2019-11-27 [1] CRAN (R 3.6.1)                  
#>  memoise       1.1.0      2017-04-21 [1] CRAN (R 3.6.0)                  
#>  modelr        0.1.5      2019-08-08 [1] CRAN (R 3.6.1)                  
#>  multcomp      1.4-11     2019-12-10 [1] CRAN (R 3.6.1)                  
#>  munsell       0.5.0      2018-06-12 [1] CRAN (R 3.5.1)                  
#>  mvtnorm       1.0-11     2019-06-19 [1] CRAN (R 3.6.0)                  
#>  openxlsx      4.1.4      2019-12-06 [1] CRAN (R 3.6.1)                  
#>  pillar        1.4.2.9001 2019-12-10 [1] Github (r-lib/pillar@82370d7)   
#>  pkgbuild      1.0.6      2019-10-09 [1] CRAN (R 3.6.1)                  
#>  pkgconfig     2.0.3      2019-09-22 [1] CRAN (R 3.6.1)                  
#>  pkgload       1.0.2      2018-10-29 [1] CRAN (R 3.6.0)                  
#>  plotrix       3.7-7      2019-12-05 [1] CRAN (R 3.6.1)                  
#>  prettyunits   1.0.2      2015-07-13 [1] CRAN (R 3.5.1)                  
#>  processx      3.4.1      2019-07-18 [1] CRAN (R 3.6.1)                  
#>  ps            1.3.0      2018-12-21 [1] CRAN (R 3.6.0)                  
#>  purrr       * 0.3.3      2019-10-18 [1] CRAN (R 3.6.1)                  
#>  R6            2.4.1      2019-11-12 [1] CRAN (R 3.6.1)                  
#>  Rcpp          1.0.3      2019-11-08 [1] CRAN (R 3.6.1)                  
#>  readr       * 1.3.1      2018-12-21 [1] CRAN (R 3.6.0)                  
#>  readxl        1.3.1      2019-03-13 [1] CRAN (R 3.6.0)                  
#>  remotes       2.1.0      2019-06-24 [1] CRAN (R 3.6.0)                  
#>  reprex        0.3.0      2019-05-16 [1] CRAN (R 3.6.0)                  
#>  rio           0.5.16     2018-11-26 [1] CRAN (R 3.6.0)                  
#>  rlang         0.4.2      2019-11-23 [1] CRAN (R 3.6.1)                  
#>  rmarkdown     2.0        2019-12-12 [1] CRAN (R 3.6.1)                  
#>  rprojroot     1.3-2      2018-01-03 [1] CRAN (R 3.5.1)                  
#>  rvest         0.3.5      2019-11-08 [1] CRAN (R 3.6.1)                  
#>  sandwich      2.5-1      2019-04-06 [1] CRAN (R 3.6.0)                  
#>  scales        1.1.0      2019-11-18 [1] CRAN (R 3.6.1)                  
#>  sessioninfo   1.1.1      2018-11-05 [1] CRAN (R 3.6.0)                  
#>  stringi       1.4.3      2019-03-12 [1] CRAN (R 3.6.0)                  
#>  stringr     * 1.4.0      2019-02-10 [1] CRAN (R 3.6.0)                  
#>  survival      3.1-8      2019-12-03 [1] CRAN (R 3.6.1)                  
#>  testthat      2.3.1      2019-12-01 [1] CRAN (R 3.6.1)                  
#>  TH.data       1.0-10     2019-01-21 [1] CRAN (R 3.5.2)                  
#>  tibble      * 2.1.3      2019-06-06 [1] CRAN (R 3.6.1)                  
#>  tidyr       * 1.0.0      2019-09-11 [1] CRAN (R 3.6.1)                  
#>  tidyselect    0.2.5      2018-10-11 [1] CRAN (R 3.5.1)                  
#>  tidyverse   * 1.3.0      2019-11-21 [1] CRAN (R 3.6.1)                  
#>  usethis       1.5.1.9000 2019-12-12 [1] Github (r-lib/usethis@23dd62c)  
#>  vctrs         0.2.0.9007 2019-12-10 [1] Github (r-lib/vctrs@3bca8ae)    
#>  withr         2.1.2      2018-03-15 [1] CRAN (R 3.5.1)                  
#>  xfun          0.11       2019-11-12 [1] CRAN (R 3.6.1)                  
#>  xml2          1.2.2      2019-08-09 [1] CRAN (R 3.6.1)                  
#>  yaml          2.2.0      2018-07-25 [1] CRAN (R 3.5.1)                  
#>  zip           2.0.4      2019-09-01 [1] CRAN (R 3.6.1)                  
#>  zoo           1.8-6      2019-05-28 [1] CRAN (R 3.6.0)                  
#> 
#> [1] C:/Users/inp099/Documents/R/win-library/3.6
#> [2] C:/Program Files/R/R-3.6.1/library

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