Subsetting WaterLevelDataFrames

Returns subsets of WaterLevelDataFrames which meet conditions.

Usage

# S3 method for WaterLevelDataFrame
subset(x, subset, select, drop = FALSE, ...)

Arguments

x

object of class WaterLevelDataFrame.

subset

logical expression indicating elements or rows to keep: missing values are taken as false.

select

expression, indicating columns to select from a data frame.

drop

passed on to [ indexing operator.

...

further arguments to be passed to or from other methods.

Value

An object similar to x, containing just the selected rows and columns. All other slots of the WaterLevelDataFrame remain unchanged.

See also

subset

Examples

wldf <- WaterLevelDataFrame(river   = "Elbe",
                            time    = as.POSIXct("2016-12-21"),
                            station = seq(257, 262, 0.1))
wldf <- subset(wldf, station >= 258 & station <= 261)