[英]Plot negative on logarithmic axis in ggplot
我遵循了這個示例,它對我的數據非常有用( https://r-graphics.org/recipe-axes-axis-log )。 除了我還嘗試添加標准偏差,對於其中一個變量,標准偏差大於平均值。 該圖只繪制了頂部誤差條,而不是底部。 如何為示例 5 添加錯誤欄?
Sample <- c(1, 2, 3, 4, 5)
Fe <- c(418, 592, 228, 351, 23880)
sd <- c(269, 538, 187, 236, 36577)
df <- data.frame(Sample, Fe, sd)
df
(plot <- ggplot(df, aes(x = Sample, y = Fe, ymin = Fe - sd, ymax = Fe + sd)) + theme_bw() +
geom_point(size=3, stat = "identity") +
geom_errorbar(aes(width = 0.1), stat = "identity") +
scale_y_continuous(trans = log10_trans(),
breaks = trans_breaks("log10", function(x) 10^x),
labels = trans_format("log10", math_format(10^.x))) +
annotation_logticks(sides = "l"))
你可以pmax(0, .)
它:
library(ggplot2)
library(scales)
ggplot(df, aes(x = Sample, y = Fe, ymin = pmax(0, Fe - sd), ymax = Fe + sd)) +
theme_bw() +
geom_point(size=3, stat = "identity") +
geom_errorbar(aes(width = 0.1), stat = "identity") +
scale_y_continuous(trans = log10_trans(),
breaks = trans_breaks("log10", function(x) 10^x),
labels = trans_format("log10", math_format(10^.x))) +
annotation_logticks(sides = "l")
或者您可以使用較小的數字並查看該錯誤欄的下端,盡管這可能表明當前值不是...
ggplot(df, aes(x = Sample, y = Fe, ymin = pmax(1, Fe - sd), ymax = Fe + sd)) +
theme_bw() +
geom_point(size=3, stat = "identity") +
geom_errorbar(aes(width = 0.1), stat = "identity") +
scale_y_continuous(trans = log10_trans(),
breaks = trans_breaks("log10", function(x) 10^x),
labels = trans_format("log10", math_format(10^.x))) +
annotation_logticks(sides = "l")
當 y 軸試圖調整時,使用更小的值將繼續壓縮其他誤差。
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