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Chapter 3 The Big Data Library
Table 3.2: Block-based computation functions. (Continued)
Function name
Description
bd.by.window
Apply the specified S-PLUS
function to multiple data blocks
defined by a moving window over
the input dataset. Each data block is
converted to a data.frame, and
passed to the specified function. If
one of the data blocks is too large
to fit in memory, an error occurs.
bd.split.by.group
Divide a dataset into multiple data
blocks, and return a list of these
data blocks
bd.split.by.window
Divide a dataset into multiple data
blocks defined by a moving
window over the dataset, and
return a list of these data blocks.
For a detailed discussion on advanced topics, such as block size issues
and increasing efficiency, see Chapter 7, Advanced Programming
Information.
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