[分享] don't use aggregate

[celestialgod (天)]

[關鍵字]:

do not use aggregate

[出處]:

http://www.r-bloggers.com/dont-use-statsaggregate/

[重點摘要]:

Most base R code has problems if there are extra attributes on a numeric
array. So R-stat code tends to have a habit of dropping attributes when it
can. it is odd that the class() is kept (which itself an attribute style
structure) and the timezone is lost, but R is full of hand-specified corner
cases.

所以aggregate會把其他多於的attributes丟掉...

很多事情又要重來一次，例如date的格式之類的

總之，此篇作者非常不推薦aggregate

建議大家愛惜自己生命，使用dplyr XDD


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推 obarisk: attr有時候也很煩
只是有時候不見了更麻煩(嘆氣
※ 編輯: celestialgod (140.109.73.190), 11/03/2015 09:43:00
推 cywhale: 以前不知dplyr data.table都用aggregate...