das_dfr-class: 'das_dfr' class

In swfscDAS: Processing DAS Data Files

das_dfr class

Description

The das_dfr class is a subclass of data.frame, created to provide a concise and robust way to ensure that the input to das_process adheres to certain requirements. Specifically, objects of class das_dfr are data frames with specific column names and classes, as detailed in the 'Properties of das_dfr' section. Objects of class das_dfr are created by das_read or as_das_dfr, and are intended to be passed directly to das_process.

Subsetting or otherwise altering an object of class das_dfr will cause the object to drop its das_dfr class attribute. das_process will then try to coerce the object to a das_dfr object. It is strongly recommended to pass an object of class das_dfr to das_process before subsetting, e.g. for events from a certain date range.

Properties of das_dfr objects

Objects of class das_dfr have a class attribute of c("das_dfr", "data.frame"). In addition, they must have the following column names and classes:

Column name	Column class
Event	"character"
EffortDot	"logical"
DateTime	c("POSIXct", "POSIXt")
Lat	"numeric"
Lon	"numeric"
Data1	"character"
Data2	"character"
Data3	"character"
Data4	"character"
Data5	"character"
Data6	"character"
Data7	"character"
Data8	"character"
Data9	"character"
Data10	"character"
Data11	"character"
Data12	"character"
EventNum	"integer"
file_das	"character"
line_num	"integer"

See Also

as_das_dfr

swfscDAS documentation built on June 10, 2025, 5:12 p.m.