Data Manipulation with Parallelism and Shared Memory Matrices

add_rownames | Add a new column with row names |

arrange | Sort data |

between | Tests whether elements of a vector lie between two values... |

bm_morder | Extension of bigmemory::morder to allow decreasing parameter... |

bm_mpermute | Extension of bigmemory::mpermute to allow decreasing... |

cumall | Cumulative all |

cumany | Cumulative any |

cummean | Cumulative mean |

define | Define new columns |

desc | Arrange specified column in descending order |

distinct | Select unique rows or unique combinations of variables |

distribute | Calculations for how to distribute x items over N nodes |

dotscapture | Capture ... for later evaluation |

dotscombine | Combine explicit and implicit dots |

dotseval | Evaluate previously captured dots |

dotsname | Ensure captured dots are all named |

dotsname1 | Name an expression (called by dotsname) |

filter | Filter data |

first | Returns first value in vector |

group_by | Group data |

group_sizes | Return size of groups |

lag | Offset x backwards by n |

last | Returns last value in vector |

lead | Offset x forwards by n |

multiplyr | Data Manipulation with Parellelism and Shared Memory Matrices |

Multiplyr-class | Parallel processing data frame |

Multiplyr-methods | Data access methods for Multiplyr |

mutate | Change values of existing variables (and create new ones) |

n | Number of items in current group |

NA_class_ | Returns NA of a particular class |

n_distinct | Return the number of unique values |

n_groups | Return number of groups |

nonunique | Returns values of x that are non-unique |

nsa | No strings attached mode |

nth | Return the nth item from a vector |

p | Concatenate (internal) |

partition_even | Partition data evenly amongst cluster nodes |

partition_group | Partition data so that each group is wholly on a node |

reduce | Summarise data (with local reduction) |

regroup | Return to grouped data |

rename | Rename variables |

select | Retain only specified variables |

shutdown | Shutdown running cluster |

slice | Select rows by position |

sm_desc_comp | Returns big.matrix descriptor offset by 1 (for row by row... |

sm_desc_group | Returns a big.matrix descriptor for a particular group ID |

sm_desc_subset | Returns big.matrix descriptor limited to particular start/end... |

sm_desc_update | Update description of a big.matrix after a row subset... |

summarise | Summarise data |

test_transition | Test for grouping transition (internal) |

transmute | Change variables and drop all others |

undefine | Delete variables |

ungroup | Return data to non-grouped |

within_group | Execute code within a group |

within_node | Execute code within a node |

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