Chloride plot with trend — trend

Function creates the cloride over time plot with trends.

Usage

trend_plot(
  qw_data,
  plot_title,
  y_label = NA,
  n_years = 10,
  POR_trend = TRUE,
  CharacteristicName = c("Chloride"),
  norm_range = c(230, 860),
  subtitle = "U.S. Geological Survey",
  include_table = TRUE
)

Arguments

qw_data: data frame returned from dataRetrieval::readWQPqw, must include columns ActivityStartDateTime, CharacteristicName, result_va
plot_title: character title for plot
y_label: character label for y axis. If left as NA, the function will attempt to use the "variableInfo" attribute of qw_data. This is attached to dataRetrieval output.
n_years: integer. This is the number of years to calculate the trend on. Default is 10. This can be a vector of years.
POR_trend: a logical indicating whether to include a trend test for the full period of record. Default is TRUE.
CharacteristicName: character CharacteristicName to plot
norm_range: a numerical range to potentially group the data. If NA, no grouping is shown.
subtitle: character. Sub-title for plot, default is "U.S. Geological Survey".
include_table: logical whether or not to include the trend table in the upper left corner.

Examples


# site <- "263819081585801"
# parameterCd <- c("00095","90095","00940","99220")
# site_data <- dataRetrieval::readWQPqw(site, 
#                                        parameterCd)
# Using package example data:
qw_data <- L2701_example_data$QW
plot_title <- paste(attr(qw_data, "siteInfo")[["station_nm"]], ": Chloride")
trend_plot(qw_data, plot_title)
#> Registered S3 methods overwritten by 'ggpp':
#>   method                  from   
#>   heightDetails.titleGrob ggplot2
#>   widthDetails.titleGrob  ggplot2