2013/8/16 PIKAL Petr :
> It depends what unixtime is. At least str(df) can help.
Thanks. Indeed following you suggestion I found it easier to use than
summary() for debugging. Now I can properly handle POSIXct thanks to
the help I got from this list a few weeks ago:)
> I am not sure if it is the
2013/8/16 PIKAL Petr :
> You will get only general answer without some example data. Se Posting Guide.
Thanks. Yes I do expect general answer, because I feel this problem of
"unmatched samples" is ubiquitious, only that I don't have a good
Google keyword to dig myself.
> df.m <- merge(df1, df2, b
-bounces@r-
> project.org] On Behalf Of Zhang Weiwu
> Sent: Thursday, August 15, 2013 6:31 PM
> To: r-help@r-project.org
> Subject: [R] to match samples by minute
>
>
> Perhaps this is simple and common, but it took me quite a while to
> admit I cannot solve i
Hi
> -Original Message-
> From: Weiwu Zhang [mailto:zhangwe...@realss.com]
> Sent: Friday, August 16, 2013 9:55 AM
> To: PIKAL Petr
> Cc: r-help@r-project.org
> Subject: Re: [R] to match samples by minute
>
> 2013/8/16 PIKAL Petr :
> > You will get on
Perhaps this is simple and common, but it took me quite a while to admit I
cannot solve it in a simple way.
The data frame `df` has the following columns:
unixtime, value, factor
Now I need a matrix of:
unixtime, value-difference-between-factor1-and-factor2
The naive solution is:
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