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