Thiel-Sen Trend Test — test_trends • wqbc

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

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.

Value

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

Details

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

See also

Examples

data <- wqbc::yuepilon
trend <- test_trends(data, breaks = 6, messages = TRUE)
if (FALSE) {
demo(test_trends)
}