lowmemST2POSIX: convert Stop_times columns to POSIXct on low memory machines

Description Usage Arguments Details Value Warning References See Also

Description

A possible replacement function for StopTimes2POSIXct. Is not used by default. used to convert Date and Time columns in the GTFS Stop_times table to a conformable POSIXct.

Usage

1
lowmemST2POSIX(column, SIRIref)

Arguments

column

A vector to convert, should be a column in the GTFS Stop_Times table.

SIRIref

A SIRI reference table from which to get the date.

Details

use of this function requires editing both the STG function and organizeSIRIdf within it to replace all StopTimes2POSIXct to lowmemST2POSIX

Value

Returns the column as a POSIXct vector

Warning

Do Not use this function on it's own, it is meant to be used only as part of the STG process

References

Bogin, D., Levy, N. and Ben-Elia E. (2018) Spatial and Temporal Estimation of the Service Reliability of Public Transportation Using Big Data and Open Source Tools

See Also

STG, StopTimes2POSIXct


SIRItoGTFS documentation built on May 2, 2019, 9:33 a.m.