test_trends: Thiel-Sen Trend Test

In bcgov/wqbc: Tidy Water Quality Data and Calculate Thresholds for British Columbia

Thiel-Sen Trend Test

Description

Analyses time series using the Thiel-Sen estimate of slope. It requires at least 6 years of data.

Usage

test_trends(
  data,
  breaks = NULL,
  FUN = "median",
  messages = getOption("wqbc.messages", default = TRUE)
)

Arguments

data	The data.frame to analyse.
breaks	A numeric vector used to create groups of consecutive months, if NULL the full year is used.
FUN	The function to use for yearly summaries, e.g. median, mean, or max.
messages	A flag indicating whether to print messages.

Details

The data must contain the columns Station, Date, Variable, Value, and Units.

Value

A tibble data.frame with rows for each Station, Variable, and month grouping, and additional columns for the sen slope estinate, 95\

See Also

zyp.sen

Examples

data <- wqbc::yuepilon
trend <- test_trends(data, breaks = 6, messages = TRUE)
## Not run: 
demo(test_trends)

## End(Not run)

bcgov/wqbc documentation built on Feb. 11, 2023, 11:15 p.m.