Function reference • fasstr

Data Tidying Functions to add rows and columns of dates and discharge conversions to daily streamflow data frames to prepare for custom analyses.
`fill_missing_dates()`	Add rows of missing dates and fill missing flow values with NA
`add_date_variables()`	Add year, month, and day of year variable columns to daily flows
`add_seasons()`	Add a column of seasons
`add_rolling_means()`	Add rolling n-day average column(s) to daily flows
`add_basin_area()`	Add a basin area column to daily flows
`add_daily_volume()`	Add a daily volumetric flows column to daily flows
`add_daily_yield()`	Add a daily volumetric water yield column to daily flows
`add_cumulative_volume()`	Add a daily cumulative volumetric flows column to daily flows
`add_cumulative_yield()`	Add a daily cumulative water yield column to daily flows
Data Screening Functions to calculate and plot statistics to screen data for outliers, gaps, and missing dates.
`plot_flow_data()`	Plot a daily streamflow data set
`screen_flow_data()`	Calculate annual summary and missing data statistics for screening data
`plot_data_screening()`	Plot annual summary statistics for data screening
`plot_missing_dates()`	Plot annual and monthly missing dates
Basic Summary Statistics Functions to calculate and plot mean, median, minimum, and selected percentiles flows. Can select duration (e.g. 7-day, 30-day) of statistics using ‘roll_days’ arguments.
`calc_daily_stats()`	Calculate daily summary statistics
`plot_daily_stats()`	Plot daily summary statistics
`calc_monthly_stats()`	Calculate monthly summary statistics
`plot_monthly_stats()`	Plot monthly summary statistics
`calc_annual_stats()`	Calculate annual summary statistics
`plot_annual_stats()`	Plot annual summary statistics
`plot_annual_means()`	Plot annual means compared to the long-term mean
`calc_longterm_daily_stats()`	Calculate long-term summary statistics from daily mean flows
`plot_longterm_daily_stats()`	Plot long-term summary statistics from daily mean flows
`calc_longterm_monthly_stats()`	Calculate long-term summary statistics from annual monthly mean flows
`plot_longterm_monthly_stats()`	Plot long-term summary statistics from annual monthly mean flows
`calc_longterm_mean()`	Calculate the long-term mean annual discharge
`calc_longterm_percentile()`	Calculate long-term percentiles
`calc_flow_percentile()`	Calculate the percentile rank of a flow value
`plot_flow_duration()`	Plot flow duration curves
Cumulative Summary Statistics Functions to calculate and plot mean, median, minimum, and selected percentiles flows for years (or seasons) by volume (cubic m) or by area-based water yield (mm) using the ‘use_yield’ and ‘basin_area’ arguments.
`calc_annual_cumulative_stats()`	Calculate annual (and seasonal) cumulative flows
`plot_annual_cumulative_stats()`	Plot annual (and seasonal) cumulative flows
`calc_monthly_cumulative_stats()`	Calculate cumulative monthly flow statistics
`plot_monthly_cumulative_stats()`	Plot cumulative monthly flow statistics
`calc_daily_cumulative_stats()`	Calculate cumulative daily flow statistics
`plot_daily_cumulative_stats()`	Plot cumulative daily flow statistics
Annual Hydrograph Statistics Functions to calculate and plot various annual statistics.
`calc_annual_flow_timing()`	Calculate annual timing of flows
`plot_annual_flow_timing()`	Plot annual timing of flows
`calc_annual_lowflows()`	Calculate annual low flows and dates
`plot_annual_lowflows()`	Plot annual low flows and dates
`calc_annual_peaks()`	Calculate annual peak flows
`calc_annual_outside_normal()`	Calculate annual days above and below normal
`plot_annual_outside_normal()`	Plot annual days above and below normal
`calc_all_annual_stats()`	Calculate all fasstr annual statistics
Annual Trending Analysis Functions to compute and plot prewhitened, non-parametric annual trends on streamflow data.
`compute_annual_trends()`	Calculate prewhitened nonlinear annual trends on streamflow data
Volume Frequency Analyses Functions to compute and plot volume frequency analyses on annual low or high streamflow data (or custom data).
`compute_annual_frequencies()`	Perform an annual low or high-flow frequency analysis
`compute_frequency_quantile()`	Calculate an annual frequency analysis quantile
`compute_hydat_peak_frequencies()`	Perform a frequency analysis on annual peak statistics from HYDAT
`compute_frequency_analysis()`	Perform a custom volume frequency analysis
Computing a Full Analysis Functions to compute a suite of data and plots from many of the fasstr functions.
`compute_full_analysis()`	Compute a suite of tables and plots from various fasstr functions
`write_full_analysis()`	Write a suite of tables and plots from various fasstr functions into a directory
Writing Functions Functions to save the outputted objected (tibbles and lists of plots) from the fasstr functions
`write_flow_data()`	Write a streamflow dataset as a .xlsx, .xls, or .csv file
`write_results()`	Write a data frame as a .xlsx, .xls, or .csv file
`write_plots()`	Write plots from a list into a directory or PDF document
`write_objects_list()`	Write all data frames and plots from a list of objects into a directory

Reference

Data Tidying

Data Screening

Basic Summary Statistics

Cumulative Summary Statistics

Annual Hydrograph Statistics

Annual Trending Analysis

Volume Frequency Analyses

Computing a Full Analysis

Writing Functions