Program_10

library(ggplot2)
plot_density_by_group <- function(data, continuous_var, group_var, fill_colors = NULL) {
  if (!(continuous_var %in% names(data)) || !(group_var %in% names(data))) {
    stop("Invalid column names: Make sure both variables exist in the dataset")
  }
  p <- ggplot(data, aes_string(x = continuous_var, color = group_var, fill = group_var)) +
    geom_density(alpha = 0.4) +
    labs(
      title = paste("Density plot of", continuous_var, "by", group_var),
      x = continuous_var,
      y = "Density"
    ) +
    theme_minimal()
  if (!is.null(fill_colors)) {
    p <- p + 
      scale_fill_manual(values = fill_colors) +
      scale_color_manual(values = fill_colors)
  }
  print(p)
}

plot_density_by_group(iris, "Sepal.Length", "Species")

Warning: `aes_string()` was deprecated in ggplot2 3.0.0.
ℹ Please use tidy evaluation idioms with `aes()`.
ℹ See also `vignette("ggplot2-in-packages")` for more information.

Developing an R function to draw a density curve representing the probability density function of a continuous variable with separate curves for each group, using ggplot2.