Using data

• Overview
  • Missing values
• Reading data
  • Formatting the data for reading
  • Example
• Defining single observations
• Constructing data over many cases
  • Introductory example
  • Constructing data from other data
  • Constructing data for a range of cases
  • Generating vectors of random numbers
  • Remarks
• Manual data selection
  • Examples
• Summarising data
• Efficient usage of patterned data
• Deleting data