CODEWITHSUNDEEP
rvector
Harbus
Harbus

Reputation: 321

Iterate through named vector using list

I have two vectors,

v <- (TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE)
named.v <- (TRUE = "#FF0000FF", FALSE="#00FF00FF", NA="0000FFFF")

I am trying to get the color associated to the values in V.

I have tried doing this

named.v[v]

But all this does is returns

        TRUE       FALSE        <NA>        <NA>        <NA>        <NA>        <NA>        <NA>        <NA>        <NA> 
"#FF0000FF" "#00FF00FF" "#0000FFFF"          NA          NA          NA          NA          NA          NA          NA

I'm really stuck and can't figure it out. Thanks for the help!

Upvotes: 2

Views: 40

Answers (1)

akrun
akrun

Reputation: 887223

We need to match with a character set instead of the logical. Here, the names of 'named.v' is character class (though there is inconsistencies in the example created - in general it is the case)

named.v[as.character(v)]
#      TRUE        TRUE        TRUE        TRUE        TRUE        TRUE        TRUE        TRUE        TRUE        TRUE 
#"#FF0000FF" "#FF0000FF" "#FF0000FF" "#FF0000FF" "#FF0000FF" "#FF0000FF" "#FF0000FF" "#FF0000FF" "#FF0000FF" "#FF0000FF"

Now, let's look at the issue in the OP's code, 'v' being logical, TRUEs implying should select that value, But, the 'named.v' is of length 3, while the logical vector is length 10, so after the first 3 is selected from 'named.v', there is nothing left, so it is missing and NA represents missing value

data

v <- c(TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE)
named.v <- c(`TRUE` = "#FF0000FF", `FALSE`="#00FF00FF", `NA`="0000FFFF")

Upvotes: 5

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