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, , y:
genus_counts <- read.table(text = "Genus variable value
1 Lepisosteus JBGC462 0
2 Lepomis JBGC462 6
3 Micropterus JBGC462 2
4 Perca JBGC462 2
5 Ictalurus JBGC462 1
6 Lepisosteus JBGC13 13
7 Lepomis JBGC13 0
8 Micropterus JBGC13 0
9 Perca JBGC13 0
10 Ictalurus JBGC13 0", header = TRUE)
ggplot(genus_counts, aes(x=Genus, y=value, fill=variable))+
geom_bar(stat="identity", position="dodge")+
scale_y_log10(limits = c(0.1, 15))

. , :
ggplot(genus_counts, aes(x=Genus, y=value, fill=variable))+
geom_bar(stat="identity", position="dodge")+
scale_y_log10(limits = c(1e-100, 15))

, 1, 1, < 1 , . ggplot2 . 0, , .
, , , , 0, 1 y. 0 , .
, - . :
ggplot(genus_counts, aes(x=Genus, y=value, fill=variable))+
geom_bar(stat="identity", position="dodge")+
scale_y_sqrt(limits = c(0, 15), breaks = (0:4)^2)

, . , , 6, 2,5 , , 1. , y .