Plot minimum runoff month — gr_plot

Generate a histogram of a minimum runoff month for two periods: before and after the change year set by year parameter.

Usage

gr_plot_minmonth(
  df,
  year = NULL,
  exclude = NULL,
  tests = NULL,
  pagebreak = FALSE,
  print = TRUE
)

Arguments

df: data.frame of hydrograph and meteorological variables as produced by gr_summarize().
year: Integer. Change year value to separate two periods.
exclude: Integer vector of years to be excluded from plotting.
tests: Tests list for the same variables (generated by gr_test_vars() function)
pagebreak: Logical. Whether to break page between plots (needed for reporting). Defaults to FALSE.
print: Boolean. Print plot? Defaults to TRUE. Use FALSE if you want to tweak the plot aesthetics before plotting.

Value

list of two ggplot2 objects, representing the histogram of a minimum runoff month for two periods: before and after the change year

Examples

library(grwat)

data(spas) # example Spas-Zagorye data is included with grwat package

# separate
sep = gr_separate(spas, params = gr_get_params(reg = 'center'))
#> grwat: data frame is correct
#> grwat: parameters list and types are OK

# summarize from 1965 to 1990
vars = gr_summarize(sep, 1965, 1990)
#> Warning: There were 4 warnings in `dplyr::summarise()`.
#> The first warning was:
#> ℹ In argument: `Dspstart = min(.data$Date[which(.data$Qspri > 0)])`.
#> ℹ In group 10: `Year1 = 1974`.
#> Caused by warning in `min.default()`:
#> ! no non-missing arguments to min; returning Inf
#> ℹ Run `dplyr::last_dplyr_warnings()` to see the 3 remaining warnings.

# plot minimum runoff month for two periods divided by Pettitt test
gr_plot_minmonth(vars, tests = gr_test_vars(vars))


# plot minimum runoff month for two periods divided by fixed year
gr_plot_minmonth(vars, year = 1978)