我想在兩條虛線（-0.5 和 0.5）之間創建一個藍色陰影區域，嘗試使用 geom_polygon() 但沒有用。如何以最好的方式做到這一點？
model <- lm(Sepal.Width ~ Petal.Length, data = iris)
ggplot(data.frame(x = seq(model$residuals), y = model$residuals))
geom_point(aes(x, y))
geom_hline(yintercept = 0, linetype = "dashed")
geom_hline(yintercept = 0.5, linetype = "dotted")
geom_hline(yintercept = -0.5, linetype = "dotted")
labs(x = "Index", y = "Residuals",
title = paste("Residuals of", format(model$call)))
uj5u.com熱心網友回復：
您可以使用geom_ribbon
ggplot(data.frame(x = seq(model$residuals), y = model$residuals))
geom_point(aes(x, y))
geom_ribbon(aes(x, ymin = -0.5, ymax = 0.5), alpha = 0.3, fill = 'steelblue')
geom_hline(yintercept = 0, linetype = "dashed")
geom_hline(yintercept = 0.5, linetype = "dotted")
geom_hline(yintercept = -0.5, linetype = "dotted")
labs(x = "Index", y = "Residuals",
title = paste("Residuals of", format(model$call)))
uj5u.com熱心網友回復：
與annotate：
annotate("rect", xmin = -Inf, xmax = Inf, ymin = -0.5, ymax = 0.5, alpha = .2, fill = "blue")
輸出：
ggplot(data.frame(x = seq(model$residuals), y = model$residuals))
geom_point(aes(x, y))
geom_hline(yintercept = 0, linetype = "dashed")
geom_hline(yintercept = c(-0.5, 0.5), linetype = "dotted")
annotate("rect", xmin = -Inf, xmax = Inf, ymin = -0.5, ymax = 0.5, alpha = .2, fill = "blue")
labs(x = "Index", y = "Residuals",
title = paste("Residuals of", format(model$call)))
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標籤：rggplot2