大约有 40,000 项符合查询结果(耗时:0.0543秒) [XML]
Reshaping data.frame from wide to long format
...nia 1952 10,058
7: AFG Afghanistan 1953 23,557
8: ALB Albania 1953 11,123
9: AFG Afghanistan 1954 24,555
10: ALB Albania 1954 12,246
Some alternative notations:
melt(setDT(wide), id.vars = 1:2, variable.name = "year")
melt(setDT(wide), measure.vars = 3:7, variable.name = "year")
m...
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answered Dec 13 '10 at 11:21
MacarseMacars...
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joelmjoelm
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Sébastien
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answered Mar 23 '11 at 21:00
ValerijValerij
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...he future.
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Oct 15 '11 at 4:16
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edited May 26 '11 at 19:53
Tathagata
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