black turn NAN when converting from luv to rgb space #12
Description
It appears that when a color is converted from luv space and has an l value of 0 it returns NaN or other weird things.
library(farver)
(black <- t(col2rgb(grey.colors(5, 0, 0.01))))
#> red green blue
#> [1,] 0 0 0
#> [2,] 1 1 1
#> [3,] 2 2 2
#> [4,] 2 2 2
#> [5,] 3 3 3
(black_luv <- convert_colour(black, "rgb", "luv"))
#> l u v
#> [1,] 0.0000000 0.000000e+00 0.000000e+00
#> [2,] 0.2741748 -5.504162e-08 3.663056e-08
#> [3,] 0.5483497 -1.100832e-07 7.326111e-08
#> [4,] 0.5483497 -1.100832e-07 7.326111e-08
#> [5,] 0.8225245 -1.651249e-07 1.098917e-07
(convert_colour(black_luv, "luv", "hsv"))
#> h s v
#> [1,] 0.0000 0.000000e+00 NaN
#> [2,] 137.2808 2.465629e-07 0.003921569
#> [3,] 137.2808 2.465629e-07 0.007843138
#> [4,] 137.2808 2.465629e-07 0.007843138
#> [5,] 137.2808 2.465629e-07 0.011764708
black_luv[, 1] <- 0
(convert_colour(black_luv, "luv", "rgb"))
#> r g b
#> [1,] NaN NaN NaN
#> [2,] NaN NaN NaN
#> [3,] NaN NaN NaN
#> [4,] NaN NaN NaN
#> [5,] NaN NaN NaN
(convert_colour(black_luv, "luv", "hsv"))
#> h s v
#> [1,] NaN 0 NaN
#> [2,] NaN 0 NaN
#> [3,] NaN 0 NaN
#> [4,] NaN 0 NaN
#> [5,] NaN 0 NaNCreated on 2019-11-08 by the reprex package (v0.3.0)
Session info
devtools::session_info()
#> ─ Session info ──────────────────────────────────────────────────────────
#> setting value
#> version R version 3.6.0 (2019-04-26)
#> os macOS Mojave 10.14.6
#> system x86_64, darwin15.6.0
#> ui X11
#> language (EN)
#> collate en_US.UTF-8
#> ctype en_US.UTF-8
#> tz America/Los_Angeles
#> date 2019-11-08
#>
#> ─ Packages ──────────────────────────────────────────────────────────────
#> package * version date lib
#> assertthat 0.2.1 2019-03-21 [1]
#> backports 1.1.5 2019-10-02 [1]
#> callr 3.3.2 2019-09-22 [1]
#> cli 1.9.9.9000 2019-10-04 [1]
#> crayon 1.3.4 2017-09-16 [1]
#> desc 1.2.0 2018-05-01 [1]
#> devtools 2.2.1 2019-09-24 [1]
#> digest 0.6.22 2019-10-21 [1]
#> ellipsis 0.3.0 2019-09-20 [1]
#> evaluate 0.14 2019-05-28 [1]
#> fansi 0.4.0 2018-10-05 [1]
#> farver * 1.1.0.9999 2019-11-08 [1]
#> fs 1.3.1 2019-05-06 [1]
#> glue 1.3.1 2019-03-12 [1]
#> highr 0.8 2019-03-20 [1]
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#> pkgbuild 1.0.6 2019-10-09 [1]
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#> pkgload 1.0.2 2018-10-29 [1]
#> prettyunits 1.0.2 2015-07-13 [1]
#> processx 3.4.1 2019-07-18 [1]
#> progress 1.2.2 2019-05-16 [1]
#> ps 1.3.0 2018-12-21 [1]
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#> sessioninfo 1.1.1 2018-11-05 [1]
#> stringi 1.4.3 2019-03-12 [1]
#> stringr 1.4.0.9000 2019-10-15 [1]
#> testthat 2.2.1 2019-07-25 [1]
#> tibble 2.1.3 2019-06-06 [1]
#> usethis 1.5.1.9000 2019-08-25 [1]
#> vctrs 0.2.0.9007 2019-10-22 [1]
#> withr 2.1.2.9000 2019-10-04 [1]
#> xfun 0.10 2019-10-01 [1]
#> yaml 2.2.0 2018-07-25 [1]
#> zeallot 0.1.0 2018-01-28 [1]
#> source
#> CRAN (R 3.6.0)
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#> Github (r-lib/cli@ad6410a)
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#> [1] /Library/Frameworks/R.framework/Versions/3.6/Resources/library