regroup
(Package: multiplyr) :
Return to grouped data
After a data frame has been grouped and then ungrouped, this function acts as a shorthand (and faster way) to reinstate grouping.
● Data Source:
CranContrib
● Keywords:
● Alias: groupwise, regroup
●
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Sorts data frame using the columns specified
● Data Source:
CranContrib
● Keywords:
● Alias: arrange, arrange_
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rename
(Package: multiplyr) :
Rename variables
Takes a list of newname=oldname pairs and renames columns
● Data Source:
CranContrib
● Keywords:
● Alias: rename, rename_
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Cumulative all
● Data Source:
CranContrib
● Keywords:
● Alias: cumall
●
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This is the mainstay of parallel computation for a data frame. This will execute the specified expression within each group. Each group will have a persistent environment, so that variables created in that environment can be referred to by, for example, later calls to summarise. This environment contains active bindings to the columns of that data frame.
● Data Source:
CranContrib
● Keywords:
● Alias: within_group
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With the exception of calling Multiplyr to create a new data frame, none of the methods/fields here are really intended for general use: it's generally best to stick to the manipulation functions. Run the following command to get a better overview: vignette("basics")
● Data Source:
CranContrib
● Keywords:
● Alias: Multiplyr, Multiplyr-class
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nth
(Package: multiplyr) :
Return the nth item from a vector
Return the nth item from a vector
● Data Source:
CranContrib
● Keywords:
● Alias: nth
●
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dotscombine
(Package: multiplyr) :
Combine explicit and implicit dots
Combine explicit and implicit dots
● Data Source:
CranContrib
● Keywords: internal
● Alias: dotscombine
●
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test_transition
(Package: multiplyr) :
Test for grouping transition (internal)
This algorithm tests specific rows for a transition. Each cluster node will test its own subset for grouping transitions, but the transition between the last row of one cluster and the first of the next needs to be tested on the master node.
● Data Source:
CranContrib
● Keywords: internal
● Alias: test_transition
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sm_desc_group
(Package: multiplyr) :
Returns a big.matrix descriptor for a particular group ID
Returns a big.matrix descriptor for a particular group ID
● Data Source:
CranContrib
● Keywords: internal
● Alias: sm_desc_group
●
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providing 
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