[R] user ignored an informative warning message (was ts.intersect bug?)

[Prof Brian Ripley]

On Wed, 21 Sep 2005, Antonio, Fabio Di Narzo claimed:

> This code gives an error:
>
> a <- ts(1:10, start=0, freq=10)
> b <- ts(1:10, start=1, freq=10)
> ts.intersect(a,b)

In reality, it gives a helpful warning:

> ts.intersect(a,b)
NULL
Warning message:
non-intersecting series in: .cbind.ts(list(...), .makeNamesTs(...), dframe 
= dframe, union = FALSE)

Your two series have no time points in common, see

> time(a)
Time Series:
Start = c(0, 1)
End = c(0, 10)
Frequency = 10
  [1] 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
> time(b)
Time Series:
Start = c(1, 1)
End = c(1, 10)
Frequency = 10
  [1] 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9

or try

> ts.union(a,b)


-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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