我使用stat_summary來顯示平均值,根據我的計算,「type1,G-」應該有〜10^7.3的平均值。這就是我沒有使用log10軸繪製它的價值。但是當我添加log10軸時,突然「type1,G-」顯示10^6.5的值。ggplot2:爲什麼設置爲log10軸時顯示錯誤的值?
發生了什麼事?
#Data
Type = rep(c("type1", "type2"), each = 6)
Gen = rep(rep(c("G-", "G+"), each = 3), 2)
A = c(4.98E+05, 5.09E+05, 1.03E+05, 3.08E+05, 5.07E+03, 4.22E+04, 6.52E+05, 2.51E+04, 8.66E+05, 8.10E+04, 6.50E+06, 1.64E+06)
B = c(6.76E+07, 3.25E+07, 1.11E+07, 2.34E+06, 4.10E+04, 1.20E+06, 7.50E+07, 1.65E+05, 9.52E+06, 5.92E+06, 3.11E+08, 1.93E+08)
df = melt(data.frame(Type, Gen, A, B))
#Correct, non-log10 version ("type1 G-" has a value over 1e+07)
ggplot(data = df, aes(x =Type,y = value)) +
stat_summary(fun.y="mean",geom="bar",position="dodge",aes(fill=Gen))+
scale_x_discrete(limits=c("type1"))+
coord_cartesian(ylim=c(10^7,10^7.5))
#Incorrect, log10 version ("type1 G-" has a value under 1e+07)
ggplot(data = df, aes(x =Type,y = value)) +
stat_summary(fun.y="mean",geom="bar",position="dodge",aes(fill=Gen))+
scale_y_log10()
它採取日誌轉換後的意思?我想這裏的正確和不正確是主觀的。 – Axeman