ffStack: Merge a data.frame into an ffdf data.frame-alike

In Stack: Stylized concatenation of data.frames or ffdfs

Description

For fast operations on large data frames, we want to turn them into ffdf. This is a special case of Stack where the first arugment is already an ffdf, and we are Stacking another data.frame into it, expanding factor levels as needed, and possibly enlarging vmodes of existing ff columns.

Usage

ffStack(ffdf, df, verbose = FALSE, ...)

## S4 method for signature 'ffdf,data.frame'
ffStack(ffdf, df, verbose = FALSE, ...)

Arguments

ffdf	an ffdf
df	a data.frame
verbose	print extra information about columns as they stack
...	further arguments

Value

An ffdf.

Stack documentation built on May 2, 2019, 2:38 a.m.