R绘制二进制时间序列

Question

I have a dataset where I have a binary value on a timeline. So for example:

Date, Event

January-29-2014, 1 
January-29-2014, 0 
January-29-2014, 1 
January-29-2014, 1 
January-30-2014, 0 

I would like to plot the 1,0 on a timeline(by Date) and in color (red bar = 1,blue bar = 0) How can I achieve this ? How do you call this ? eg binary timeline plotting :)

Sorry and thanks for your help.

Answer 1

Is think this is what you want. Using fake data:

n = 100
x = seq(n)
y = sample(0:1, n, replace=TRUE)

DF = data.frame(Date=x, Event=y)

ones = rep(1, nrow(DF))

colors = c("blue", "red")
plot(DF$Date, ones, type="h", col=colors[DF$Event +1],
     ylim=c(0,1))

Answer 2

Not really sure what you want. Do you want aggregate data by day. Like an epidemiological curve?

library(lubridate)
library(plyr)
library(ggplot2)

dat = read.table(header=TRUE, text='Date Event

January-29-2014, 1 
January-29-2014, 0 
January-29-2014, 1 
January-29-2014, 1 
January-30-2014, 0 ')

dat$Date = mdy(dat$Date)

agg = ddply(dat, 'Date', summarise, Events = sum(Event))

ggplot(data=agg, aes(x = Date, y = Events)) + geom_bar(stat='identity') + scale_x_datetime(expand=c(1,0))

Output: