search for: 20080507l

Displaying 3 results from an estimated 3 matches for "20080507l".

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2009 Mar 31
0
data.table is on CRAN (enhanced data.frame for time series joins and more)
...,20080502L)] # 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...
2009 Mar 31
0
data.table is on CRAN (enhanced data.frame for time series joins and more)
...,20080502L)] # 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...
2009 Apr 01
0
回复: R-help Digest, Vol 73, Issue 32
...,20080502L)]                 # 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...