ggplot2 time series plotting: how to omit periods when there is no data points?

Question

I have a time series with multiple days of data. In between each day there\'s one period with no data points. How can I omit these periods when plotting the time series usin

Answer 1

The problem is that how does ggplot2 know you have missing values? I see two options:

1. Pad out your time series with NA values

2. Add an additional variable representing a "group". For example,

   dd = data.frame(Time, Value)
   ##type contains three distinct values
   dd$type = factor(cumsum(c(0, as.numeric(diff(dd$Time) - 1))))
   
   ##Plot, but use the group aesthetic
   ggplot(dd, aes(x=Time, y=Value)) +
         geom_line (aes(group=type))
   

   gives