CODEWITHSUNDEEP
rvector
Kyle Weise
Kyle Weise

Reputation: 879

Get value of named character vector element when name is NA

Suppose I have a named character vector like this:

> class(colors)
[1] "character"

> colors
       9074        8778        8577        7148        <NA>        3310     0050169        8893       50156        9008        9778 
"#FF0000FF" "#FF7600FF" "#FFEB00FF" "#9DFF00FF" "#27FF00FF" "#00FF4EFF" "#00FFC4FF" "#00C4FFFF" "#004EFFFF" "#2700FFFF" "#9D00FFFF" 
       5295     0080162 
"#FF00EBFF" "#FF0076FF"

where the names are IDs, and the values are colors. If I give an ID to the colors vector, I get the corresponding color.

> colors["9074"]
       9074 
"#FF0000FF"

However for the one case where the name is <NA>, I do not know how I can return the corresponding color. Simply providing NA does not work

> colors[NA]
<NA> <NA> <NA> <NA> <NA> <NA> <NA> <NA> <NA> <NA> <NA> <NA> <NA> 
  NA   NA   NA   NA   NA   NA   NA   NA   NA   NA   NA   NA   NA 

> colors["NA"]
<NA> 
  NA

Any suggestions?

Upvotes: 4

Views: 1470

Answers (2)

Rui Barradas
Rui Barradas

Reputation: 76402

Since colors already is the name of a base R function, I will create a vector x.

x <- 1:5
names(x) <- c("A", "B", NA, "D", "E")

x[is.na(names(x))]
#<NA> 
#   3

Upvotes: 1

johnckane
johnckane

Reputation: 645

This should work, but would return multiple values if multiple colors don't have names.

colors[which(is.na(names(colors)))]

Upvotes: 0

Related Questions