[R] dplyr - add/expand rows

[William Dunlap]

dplyr may have something for this, but in base R I think the following does
what you want.  I've shortened the name of your data set to 'd'.

i <- rep(seq_len(nrow(d)), d$YEAR_TO-d$YEAR_FROM+1)
j <- sequence(d$YEAR_TO-d$YEAR_FROM+1)
transform(d[i,], YEAR=YEAR_FROM+j-1, YEAR_FROM=NULL, YEAR_TO=NULL)


Bill Dunlap
TIBCO Software
wdunlap tibco.com

On Sat, Nov 25, 2017 at 11:18 AM, Hutchinson, David (EC) <
david.hutchinson at canada.ca> wrote:

> I have a returned tibble of station operational record similar to the
> following:
>
> > data.collection
> # A tibble: 5 x 4
>   STATION_NUMBER YEAR_FROM YEAR_TO RECORD
>            <chr>     <int>   <int>  <chr>
> 1        07EA001      1960    1960    QMS
> 2        07EA001      1961    1970    QMC
> 3        07EA001      1971    1971    QMM
> 4        07EA001      1972    1976    QMC
> 5        07EA001      1977    1983    QRC
>
> I would like to reshape this to one operational record (row) per year per
> station. Something like:
>
> 07EA001              1960      QMS
> 07EA001              1961      QMC
> 07EA001              1962      QMC
> 07EA001              1963      QMC
> ...
> 07EA001              1971      QMM
>
> Can this be done in dplyr easily?
>
> Thanks in advance,
>
> David
>
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>
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