Plot vector as barplot

Question

I have a vector:

x<-c(1,1,1,1,2,3,5,1,1,1,2,4,9)
y<-length(x)

I would like to plot this such that each value is plotted separately instead of plotting counts.

So basically each value should be represented separately in the plot where the length of the x axis is equal to y and each value is plotted on the y axis.

How can this be done using qplot?

for a matrix:

a<-matrix(NA, ncol=3, nrow=100)

a[,1]<-1:100
a[,2]<-rnorm(100)
a[,3]<-rnorm(100)

a<-melt(as.data.frame(a),id.vars="V1")

ggplot(a,aes(seq_along(a),a))+geom_bar(stat="identity")+facet_wrap(V1)

Answer 1

With ggplot2 use x as y values and make sequence along x values for the x axis.

ggplot(data.frame(x),aes(seq_along(x),x))+geom_bar(stat="identity")

If you have matrix a and you need to make plot for each row then melt it and then use variable for x axis and value for the y axis

a<-melt(as.data.frame(a),id.vars=1)

ggplot(a,aes(variable,value))+geom_bar(stat="identity")+facet_wrap(~V1)