dat_count, aes(x = sheet, y = value, fill = n)) + scale_fill_gradientn(colours = c("yellow", "red")) + geom_line(data = dat_long, aes(x = sheet, y = value, group = ࢯ໊), color = "gray", alpha = 0.2) + geom_line(data = dat_summarize, aes(x = sheet, y = mean, group = key), color = "red", size = 1.5) + geom_text(data = dat_count, aes(x = sheet, y = value, label = n)) + facet_wrap(~ key)