座標 vs. 尺度
ggplot2 中級資料視覺化
Rick Scavetta
Founder, Scavetta Academy
繪製原始資料
ggplot(msleep, aes(bodywt, y = 1)) +
geom_jitter() +
scale_x_continuous(limits = c(0, 7000),
breaks = seq(0, 7000, 1000))
轉換原始資料
ggplot(msleep, aes(log10(bodywt), y = 1)) +
geom_jitter() +
scale_x_continuous(limits = c(-3, 4),
breaks = -3:4)
加入對數刻度標記
ggplot(msleep, aes(log10(bodywt), y = 1)) +
geom_jitter() +
scale_x_continuous(limits = c(-3, 4),
breaks = -3:4) +
annotation_logticks(sides = "b")
使用 scale_*_log10()
ggplot(msleep, aes(bodywt, y = 1)) +
geom_jitter() +
scale_x_log10(limits = c(1e-03, 1e+04))
比較直接轉換與 scale_*_log10() 輸出
使用 coord_trans()
ggplot(msleep, aes(bodywt, y = 1)) +
geom_jitter() +
coord_trans(x = "log10")
比較 scale_*_log10() 與 coord_trans() 輸出
調整標籤
