lbj_cells-class {validate}

Logging object to use with the lumberjack package

Description

Logging object to use with the lumberjack package

Format

A reference class object

Methods

add(meta, input, output)

Add logging info based on in- and output

dump(file = NULL, verbose = TRUE, ...)

Dump logging info to csv file. All arguments in '...' except row.names are passed to 'write.csv'

initialize(..., verbose = TRUE, label = "")

Create object. Optionally toggle verbosity.

log_data()

Return logged data as a data.frame

Details

This obeject can used with the function composition ('pipe') operator of the lumberjack package. The logging is based on validate's cells function. The output is written to a csv file wich contains the following columns.

step	integer	Step number
time	POSIXct	Timestamp
expr	character	Expression used on data
cells	integer	Total nr of cells in dataset
available	integer	Nr of non-NA cells
missing	integer	Nr of empty (NA) cells
still_available	integer	Nr of cells still available after expr
unadapted	integer	Nr of cells still available and unaltered
unadapted	integer	Nr of cells still available and altered
imputed	integer	Nr of cells not missing anymore

Note

This logger is suited only for operations that do not change the dimensions of the dataset.

See Also

Other loggers: lbj_rules-class