R help - May 2009 - plotting time series with data gap using type line- but do not want to connect gap with line

I have a time series of about 1500 measurements.  There are sporadic data 
gaps.  I would like to plot the time series with type "line".  I only
want
a line to connect the periods with data; I don't want a line to connect 
the points across a data gap.  Is there a function or recommended method 
to deal with this?

For example
there are 2000 days
days 1:1000 each have one measurement of temperature
days 1001: 1199 have no data
days 1200:2000 each have one measurement of temperature

I want the plot to connect points 1:1000 with a line, and to connect 
points 1200: 2000 with a different  line. I don't want a line to connect 
points 1001:1200. 

I searched the help archives and google but couldn't find anything. Any 
advice?



JK
	[[alternative HTML version deleted]]

Just place a point with an NA value between the two segments.
Here is one way to do it in zoo:

set.seed(123)
library(zoo)

# create sample data
tt <- c(1:1000, 1200:2000)
z <- zoo(rnorm(length(tt)), tt)

# this will fill in omitted values with NAs
z <- as.zoo(as.ts(z))

plot(z)



On Thu, May 28, 2009 at 3:05 PM,  <Josef.Kardos at phila.gov>
wrote:
> I have a time series of about 1500 measurements. ?There are sporadic data
> gaps. ?I would like to plot the time series with type "line". ?I
only want
> a line to connect the periods with data; I don't want a line to connect
> the points across a data gap. ?Is there a function or recommended method
> to deal with this?
>
> For example
> there are 2000 days
> days 1:1000 each have one measurement of temperature
> days 1001: 1199 have no data
> days 1200:2000 each have one measurement of temperature
>
> I want the plot to connect points 1:1000 with a line, and to connect
> points 1200: 2000 with a different ?line. I don't want a line to
connect
> points 1001:1200.
>
> I searched the help archives and google but couldn't find anything. Any
> advice?
>
>
>
> JK
> ? ? ? ?[[alternative HTML version deleted]]
>
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