[R] foverlaps data.table error

[Jeff Newmiller]

Disclaimer: I am not a user of this package.

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[1] https://stackoverflow.com/questions/48141991/foverlaps-and-within-in-data-table

On Sun, 7 Jan 2018, Rahul Sharm wrote:

> Hello All
> Have 2 tables
> dt1:
> start end kwh10min
> 2013-04-01 00:00:54 UTC 2013-04-01 01:00:10 UTC 0.05
> 2013-04-01 00:40:26 UTC 2013-04-01 00:50:00 UTC 0.1
> 2013-04-01 02:13:20 UTC 2013-04-01 04:53:42 UTC 0.15
> 2013-04-02 02:22:00 UTC 2013-04-01 04:33:12 UTC 0.2
> 2013-04-01 02:26:23 UTC 2013-04-01 04:05:12 UTC 0.25
> 2013-04-01 02:42:47 UTC 2013-04-01 04:34:33 UTC 0.3
> 2013-04-01 02:53:12 UTC 2013-04-03 05:27:05 UTC 0.35
> 2013-04-02 02:54:08 UTC 2013-04-02 05:31:15 UTC 0.4
> 2013-04-03 02:57:16 UTC 2013-04-03 05:29:32 UTC 0.45
> dt2: start and end are 10 minute interval blocks spanning 2013-4-1 00:00:00
> to 2013-04-04
>
> I want to add the column 3 of dt1 to map as long as the start and end time
> are within the 10 minute blocks and keep appending the columns
>
> ideally the output should be
> 4/1/2013 0:00
> 4/1/2013 0:10
> 0.05 0
>
> 4/1/2013 0:10
> 4/1/2013 0:20
> 0.05 0
>
> 4/1/2013 0:20
> 4/1/2013 0:30
> 0.05 0
>
> 4/1/2013 0:30
> 4/1/2013 0:40
> 0.05 0
>
> 4/1/2013 0:40
> 4/1/2013 0:50
> 0.05 0.01
>
> 4/1/2013 0:50
> 4/1/2013 1:00
> 0.05 0.01
> I tried
> setkey(dums,start,end)
> setkey(map,start,end)
> foverlaps(map,dums,type="within",nomatch=0L)
>
> I keep getting the error
> Error in foverlaps(map, dums, type = "within", nomatch = 0L) :
>  All entries in column start should be <= corresponding entries in column
> end in data.table 'y'
>
> 	[[alternative HTML version deleted]]
>
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