This function creates crosstabs in a flexible manner.

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`data` |
Data frame to be analyzed |

`formula` |
A formula for the table with a single row column on the left and column variables in the right |

`row.vars` |
A single or vector of row variables, quoted. These are appended to any row variable from formula. |

`col.vars` |
A single or vector of column variables, quoted. These are appended to any column variables from formula. |

`format` |
"freq", "col_percent", "row_percent", "total_percent" |

`title` |
string Title to be used for printing |

`row.margin.format` |
"percent" to show row percents, "freq" to show row frequency, "none" for no margin |

`col.margin.format` |
"percent" to show percents, "freq" to show column frequencies, "none" for no margin |

`dnames` |
vector Dimension names to replace the variable names. |

`useNa` |
"ifany", "no", "always" |

`pretty.pring` |
logical TRUE means to add linebreaks for printing with Pander or another package. |

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