Displaying 3 results from an estimated 3 matches for "20080508l".
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20080508
2009 Mar 31
0
data.table is on CRAN (enhanced data.frame for time series joins and more)
...] # row for A where date also matches
exactly
DT[J("A",20080505L)] # NA since 5 May is missing (outer join
by default)
DT[J("A",20080505L),nomatch=0] # inner join instead
dts = c(20080501L, 20080502L, 20080505L, 20080506L, 20080507L, 20080508L)
DT[J("A",dts)] # 3 of the dates in dts match
exactly
DT[J("A",dts),roll=TRUE] # roll previous data forward i.e.
return the prevailing observation
DT[J("A",dts),rolltolast=TRUE] # roll all but last observation...
2009 Mar 31
0
data.table is on CRAN (enhanced data.frame for time series joins and more)
...] # row for A where date also matches
exactly
DT[J("A",20080505L)] # NA since 5 May is missing (outer join
by default)
DT[J("A",20080505L),nomatch=0] # inner join instead
dts = c(20080501L, 20080502L, 20080505L, 20080506L, 20080507L, 20080508L)
DT[J("A",dts)] # 3 of the dates in dts match
exactly
DT[J("A",dts),roll=TRUE] # roll previous data forward i.e.
return the prevailing observation
DT[J("A",dts),rolltolast=TRUE] # roll all but last observation...
2009 Apr 01
0
回复： R-help Digest, Vol 73, Issue 32
...] # row for A where date also matches
exactly
DT[J("A",20080505L)] # NA since 5 May is missing (outer join
by default)
DT[J("A",20080505L),nomatch=0] # inner join instead
dts = c(20080501L, 20080502L, 20080505L, 20080506L, 20080507L, 20080508L)
DT[J("A",dts)] # 3 of the dates in dts match
exactly
DT[J("A",dts),roll=TRUE] # roll previous data forward i.e.
return the prevailing observation
DT[J("A",dts),rolltolast=TRUE] # roll all but last observation...