using tmap_save() without a filename when file already exists does not yield useful error message #364
Description
When saving a tmap object to file without specifying a filename, and the file already exists, the error message is the following:
Error in sprintf("%02d", fid) :
invalid format '%02d'; use format %f, %e, %g or %a for numeric objects
In addition: Warning message:
In max(as.integer(substr(files, 5, 6))) :
no non-missing arguments to max; returning -Inf
This makes it hard to understand what is going on (i.e. simply that it does not want to overwrite the file)
Could a more informative error message be implemented?
This can be tested with the following:
data(World)
m <- tm_shape(World) +
tm_polygons()
tmap_save(m) # saves with default name "tmap.png"
tmap_save(m) # try it againMy session info:
R version 3.6.1 (2019-07-05)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 18362)
Matrix products: default
locale:
[1] LC_COLLATE=English_Australia.1252 LC_CTYPE=English_Australia.1252
[3] LC_MONETARY=English_Australia.1252 LC_NUMERIC=C
[5] LC_TIME=English_Australia.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] tmap_2.3-1 sf_0.8-0 dplyr_0.8.3 osmdata_0.1.1.007
loaded via a namespace (and not attached):
[1] tidyselect_0.2.5 purrr_0.3.3 lattice_0.20-38 viridisLite_0.3.0 htmltools_0.4.0
[6] yaml_2.2.0 XML_3.98-1.20 rlang_0.4.1 e1071_1.7-2 pillar_1.4.2
[11] later_1.0.0 glue_1.3.1 DBI_1.0.0 sp_1.3-1 RColorBrewer_1.1-2
[16] stringr_1.4.0 rgeos_0.5-2 rvest_0.3.4 raster_3.0-7 htmlwidgets_1.5.1
[21] leafsync_0.1.0 codetools_0.2-16 fastmap_1.0.1 httpuv_1.5.2 crosstalk_1.0.0
[26] curl_4.2 class_7.3-15 Rcpp_1.0.2 KernSmooth_2.23-15 xtable_1.8-4
[31] promises_1.1.0 classInt_0.4-2 lwgeom_0.1-7 leaflet_2.0.2 jsonlite_1.6
[36] mime_0.7 digest_0.6.22 stringi_1.4.3 shiny_1.4.0 tmaptools_2.0-2
[41] grid_3.6.1 rgdal_1.4-7 tools_3.6.1 magrittr_1.5 tibble_2.1.3
[46] dichromat_2.0-0 crayon_1.3.4 pkgconfig_2.0.3 xml2_1.2.2 lubridate_1.7.4
[51] assertthat_0.2.1 httr_1.4.1 rstudioapi_0.10 R6_2.4.0 units_0.6-5
[56] compiler_3.6.1