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Smooth Daily Rainfall Data

Source: R/climate_processing_functions.R
daily_smooth_rain.Rd

This function uses a smoothing spline to interpolate daily cumulative rainfall data from a dataset containing weekly or monthly cumulative rainfall values.

Usage

daily_smooth_rain(cum_rain)

Arguments

cum_rain

A data frame with two columns:

  • period: A column representing the time period (e.g., weekly dates), of class Date.

  • cumulative_rainfall: A column representing the cumulative rainfall for each period.

Value

A data frame with two columns:

  • Date: A column with daily dates, interpolated from the original period.

  • CumulativeRainfall: A column with smoothed daily cumulative rainfall values.

Examples

# Example dataset with weekly cumulative rainfall
weekly_dates <- seq(as.Date("2023-01-01"), as.Date("2023-12-24"), by = "7 days")
cum_rain <- data.frame(
  period = weekly_dates,
  cumulative_rainfall = cumsum(runif(length(weekly_dates), min = 0, max = 20))
)

# Smooth to daily cumulative rainfall
daily_rain <- daily_smooth_rain(cum_rain)

# Plot the results
if (requireNamespace("ggplot2", quietly = TRUE)) {
  ggplot2::ggplot(daily_rain, ggplot2::aes(x = Date, y = CumulativeRainfall)) +
    ggplot2::geom_line(color = "blue") +
    ggplot2::labs(title = "Daily Smoothed Cumulative Rainfall",
                  x = "Date", y = "Cumulative Rainfall") +
    ggplot2::theme_minimal()
}