Making a bubble plot to show frequencies

I've been using ggplot2 in R to make a bubbleplot, to show frequencies. This is an alternative to a histogram. Here's a little example:

 I have a file year_data_file_example.txt with columns YEAR, LINEAGE, NUMBER, with the number of bacterial isolates of each particular lineage:

YEAR LINEAGE NUMBER

1990 lineage1 30

1990 lineage2 25

1990 lineage3 5

1991 lineage1 25

1991 lineage2 27

1991 lineage3 8

1992 lineage1 20

1992 lineage2 28

1992 lineage3 9 

 

I made a bubbleplot using R by typing: 

> library("ggplot2")

> MyData <- read.table("year_data_file_example.txt",header=TRUE)
> ggplot(MyData, aes(x=MyData$YEAR, y=MyData$LINEAGE, size=MyData$NUMBER)) + geom_point(color = 'blue')

 

Acknowledgements

Thanks to my colleague Amber Barton for advice.