CODEWITHSUNDEEP
r
Kaleb
Kaleb

Reputation: 1022

Put string version of operator in between its operands

If I have a variable holding a string representation of a comparative operator such as:

> comparison <- "=="

how can I interpolate this string version of the binary operator between its operands? E.g. 

> 2 <insert comparison> 2
TRUE

NB. I do not want to use mapply(get(comparison),2,2 since I intend to put 2 <insert comparison> 2 as an argument to which.

Upvotes: 2

Views: 87

Answers (1)

Tommy
Tommy

Reputation: 40861

I don't quite understand why you don't want to use mapply, but do.call is probably better anyway.

comparison <- "=="
do.call(comparison, list(2,2))

which( do.call(comparison, list(2,0:4)) )

Upvotes: 4

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