在R中的Boxplot中记录Y轴

Question

我的数据集中有34个变量.我正在尝试为每个变量制作boxplot.我也想使用log Y轴.这是我的R代码:

boxplot(mydata,log ="y")警告信息:在plot.window中(xlim = xlim,ylim = ylim,log = log,yaxs = pars $ yaxs):非限定轴限制[GScale(-inf,3.61878,2, ); 日志= 1]

你能帮我解决一下吗？另外,我需要在这个图中的所有变量名称.谢谢提前!

Answer 1

问题是在你的"mydata"中有变量包含"0"值.对于零值,y轴的logaritmic重新缩放提供"-Inf"

log(0)
[1] -Inf

# I tried to reproduce your example:
library(datasets)
data(airquality)

x <- airquality
boxplot(x, log="y") # works fine!

# Now I'm going to manipulate the data by changing the first value of dataset.
x[1,1] <- 0
boxplot(x, log="y")

Warning message:
In plot.window(xlim = xlim, ylim = ylim, log = log, yaxs = pars$yaxs) :
  nonfinite axis limits [GScale(-inf,2.52375,2, .); log=1]

# To solve this problem I would suggest to replace all "0"-values to 
# "1" values. Why? Because after you want to build log-values, and log(1)=0

x[(x == 0)] <- 1
boxplot(x, log="y") # It works fine!