SWMPr (version 2.1.4)

subset.swmpr: Subset a swmpr object

Description

Subset a swmpr object by a date range, parameters, or non-empty values

Usage

## S3 method for class 'swmpr':
subset(x, subset = NULL, select = NULL, operator = NULL,
  rem_rows = FALSE, rem_cols = FALSE, ...)

Arguments

x

input swmpr object

subset

chr string of form 'YYYY-mm-dd HH:MM' to subset a date range. Input can be one (requires operator or two values (a range).

select

chr string of parameters to keep

operator

chr string specifiying binary operator (e.g., '>', '<='< code="">) if subset is one date value

rem_rows

logical indicating if rows with no data are removed, default FALSE

rem_cols

is logical indicating if cols with no data are removed, default FALSE

...

arguments passed to other methods

Value

• Returns a swmpr object as a subset of the input. The original object will be returned if no arguments are specified.

concept

organize

Details

This function is used to subset swmpr data by date and/or a selected parameter. The date can be a single value or as two dates to select records within the range. The former case requires a binary operator input as a character string passed to the argument, such as > or <. The subset argument for the date(s) must also be a character string of the format YYYY-mm-dd HH:MM for each element (i.e., `

See Also

subset

Examples

## get data
data(apaebmet)
dat <- apaebmet

## subset records greater than or equal to a date
subset(dat, subset = '2013-01-01 0:00', operator = '>=')

## subset records within a date range, select two parameters
subset(dat, subset = c('2012-07-01 6:00', '2012-08-01 18:15'),
   select = c('atemp', 'totsorad'))