Return both a value and its visibility
This function evaluates an expression, returning it in a two element list containing its value and a flag showing whether it would automatically print.
- An expression to be evaluated.
The argument is evaluated in the caller's context.
This is a primitive function.
- The value of
- logical; whether the value would auto-print.
x <- 1 withVisible(x <- 1) x withVisible(x) # Wrap the call in evalq() for special handling df <- data.frame(a = 1:5, b = 1:5) evalq(withVisible(a + b), envir = df)
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