Hi, I have a trouble in running beeswarm package.

Even if I had a plot results, I saw warning messages as follows

This is a code:

install.packages('beeswarm')

install.packages('RColorBrewer')

library(beeswarm)

library(RColorBrewer)

setwd("C:/Users/pjh74/Desktop/exercise")

titanic <- read.csv("https://static-resources.zybooks.com/static/titanic.csv", fileEncoding = "UTF-8-BOM")

beeswarm(fare ~ deck, data = titanic,

log = TRUE, pch = 16, col = rainbow(8),

main = "Fares paid by passengers of the Titanic by deck")

And these are warning messages:

1: In beeswarm.default(split(mf[[response]], f), pwpch = pwpch, pwcol = pwcol, :

values <= 0 omitted from logarithmic plot

2: In xy.coords(x = x, y = y, recycle = TRUE, log = log) :

12 y values <= 0 omitted from logarithmic plot

3: In xy.coords(x = x, y = y, recycle = TRUE, log = log) :

1 y value <= 0 omitted from logarithmic plot

4: In xy.coords(x = x, y = y, recycle = TRUE, log = log) :

2 y values <= 0 omitted from logarithmic plot

Could anybody help me to understand the messages?