[R] How to plot multiple time series with different time base in same plot?

[Mario Bourgoin]

Hi Matthijs,
Look at the code in the attached file and try it out.
Best,
Mario



On Fri, Jan 4, 2013 at 5:53 PM, Matthijs Daelman <matthijs.daelman at gmail.com
> wrote:

> Hi
>
> I have to time series with a different time base.
>
> The first has only sporadic datapoints:
> 2011-02-01 15.29130
> 2011-02-08 17.60278
> 2011-02-15 17.99737
> 2011-02-22 25.43690
>
> The other has a daily datapoint:
> 2011-02-01 342.34
> 2011-02-02 68.45
> 2011-02-03 130.47
> 2011-02-04 129.86
> 2011-02-05 81.98
> 2011-02-06 77.30
> 2011-02-07 81.38
> 2011-02-08 139.95
> 2011-02-09 124.40
> ...etc.
>
> In Excel, it is fairly easy to get these two time series in one and the
> same scatter plot, with two Y-axes, but how would you do this with R?
>
> Also, I would like to obtain a data frame that contains both variables:
> 2011-02-01 342.34       15.29130
> 2011-02-02 68.45         NA
> 2011-02-03 130.47       NA
> 2011-02-04 129.86       NA
> 2011-02-05 81.98         NA
> 2011-02-06 77.30         NA
> 2011-02-07 81.38         NA
> 2011-02-08 139.95       17.60278
> 2011-02-09 124.40        NA
> etc.
>
> I can imagine that the data frame can be obtained using (nested) loops, but
> that does not seem very efficient with a large dataset.
>
> Any ideas?
>
> Thanks a lot.
>
> Matthijs Daelman
>
>         [[alternative HTML version deleted]]
>
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-- 
Mario Bourgoin, Ph.D.
Department of Mathematics
Brandeis University
Waltham, MA