RObject _ Thing -- extract a single element of an R object

• Operator: _

• Usage:

  x_i

• Inputs:
  • x, a R object,
  • i, a thing, the index (one-based);
• Outputs:
  • a R object, the i-th element of x;

i1 : x = RObject toList(5..15)

o1 =  [1]  5  6  7  8  9 10 11 12 13 14 15

o1 : RObject of type integer

i2 : x_1

o2 = [1] 5

o2 : RObject of type integer