How to make a barplot with R from a table?

Question

I have some data in .cvs. I would like to make a simple barplot in R, with this data, but I a little lost in R.

Specie   Number
A        18756
V        8608          


        

Answer 1

Here's a simple example:

y = data.frame(Specie=c('A','V','R','P','O'),Number=c(18756,8608,3350,3312,1627))
barplot(y$Number, names.arg=y$Specie)

You would use read.csv (or one of its friends) to read from a file into a Data Frame.

Answer 2

Try help(barplot), In there you'll find a command that does what you need. Specifically you'll enter Number as the height argument and Specie for the names.arg argument.