Plot annual means using the longterm annual mean as the point of reference for annual means. Calculates statistics
from all values, unless specified. Data calculated using calc_annual_stats()
function. Returns a list of plots.
plot_annual_means( data, dates = Date, values = Value, groups = STATION_NUMBER, station_number, roll_days = 1, roll_align = "right", water_year_start = 1, start_year, end_year, exclude_years, months = 1:12, ignore_missing = FALSE, include_title = FALSE )
data  Data frame of daily data that contains columns of dates, flow values, and (optional) groups (e.g. station numbers).
Leave blank if using 

dates  Name of column in 
values  Name of column in 
groups  Name of column in 
station_number  Character string vector of seven digit Water Survey of Canada station numbers (e.g. 
roll_days  Numeric value of the number of days to apply a rolling mean. Default 
roll_align  Character string identifying the direction of the rolling mean from the specified date, either by the first
( 
water_year_start  Numeric value indicating the month ( 
start_year  Numeric value of the first year to consider for analysis. Leave blank to use the first year of the source data. 
end_year  Numeric value of the last year to consider for analysis. Leave blank to use the last year of the source data. 
exclude_years  Numeric vector of years to exclude from analysis. Leave blank to include all years. 
months  Numeric vector of months to include in analysis (e.g. 
ignore_missing  Logical value indicating whether dates with missing values should be included in the calculation. If

include_title  Logical value to indicate adding the group/station number to the plot, if provided. Default 
A list of ggplot2 objects for with the following plots for each station provided:
a plot that contains annual means with the longterm mean as the xaxis intercept
# Run if HYDAT database has been downloaded (using tidyhydat::download_hydat()) if (file.exists(tidyhydat::hy_downloaded_db())) { # Plot annual means plot_annual_means(station_number = "08NM116") # Plot mean flows from JulySeptember plot_annual_means(station_number = "08NM116", months = 7:9) }#> Warning: One or more calculations included missing values and NA's were produced. Filter data for complete years or months, or use to ignore_missing = TRUE to ignore missing values.#> Warning: One or more calculations included missing values and NA's were produced. Filter data for complete years or months, or use to ignore_missing = TRUE to ignore missing values.#> $Annual_Means#>