find_outliers: find_outliers. Flag sediment outliers based on threshold...

In USGS-R/sedReview: A package and shiny GUI for review of discrete water-quality sediment records and box coefficient exploration of data stored in the USGS NWIS system

Description

Function to flag sediment outliers based on threshold criteria.

Flags for suspended sediment concentration (P80154), suspended sediment load (P80155), bed and suspended sediment loss on ignition (P00496/00535), and Sand/Silt break (P70331 Suspended sediment, sieve diamter, percent smaller than 0.0625mm)

Usage

find_outliers(
  x,
  site_no = NULL,
  lowThreshold = 0.1,
  highThreshold = 0.9,
  returnAll = FALSE
)

Arguments

x	A dataframe output from get_localNWIS
site_no	Character of a site number in the x dataframe from get_localNWIS if x contains more than one site. Default is NULL.
lowThreshold	numeric value between 0 and 1 indicating the quantile threshold for a low value outlier.
highThreshold	numeric value between 0 and 1 indicating the quantile threshold for a high value outlier.
returnAll	logical, return dataframe containing all results or only return flagged samples. Defualt is FALSE

Details

Rejected samples are not included.

Value

A dataframe containing all samples with applicable flags

Examples

data("exampleData",package="sedReview")
x <- exampleData
outliers_05586300 <- find_outliers(x, site_no = "05586300")

USGS-R/sedReview documentation built on Aug. 24, 2020, 9 p.m.