Chapter 2 Numeric vectors

Learning objectives:

• Create numeric vector

  • c , rep/seq and :,
  • (pseudo)random numbers, sample() / r+unif/norm.
    
  • reading with scan

• Naming our first object: <-

• Vectorized mathematical functions

  • Some ubiquitous operations: abs, round, exp.
  • Probability distribution: continuous (uniform) / discrete (Poison).
  • Arithmetic operations
    • Vectorized arithmetic operators.
    • Recycling rule
      
    • Operator precedence
    • shortly accumulating and aggregating