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Formulas Parsing Model matrix Get dummies Factors

Change unique() to return present elements, while levels() returns dead elements as well cut(dv::DataVector)

  • Workflow demo:

    • csvDataFrame() loading
    • Text summaries
    • referencing (basic, advanced)
    • assign
    • with() / within()
    • Split-Apply-Combine
    • Join/merge
    • Visualization
    • (Generalized) linear regression modeling using formulas
  • Design/lower-level demo:

    • type hierarchy
    • DataVector's and NAs
    • PooledDataVector's
    • DataFrame's
    • Indexes for column names
    • rbind, cbind
    • based_on?
    • subDataFrame, groupedDataFrame
    • grouping operations
    • pipelining
    • by, colwise
    • stack/unstack
  • Bugs

    • expand doesn't work with PooledDataVector's with pool of length 1