标签:的问答
我如何使用可变名称来指数据框架栏目,而数据栏则充份?
原文:How can I use variable names to refer to data frame columns with ddply?
原文:How can I use variable names to refer to data frame columns with ddply?
I am trying to write a function that takes as arguments the name of a data frame holding time series data and the name of a column in that data frame. The function performs various manipulations on ...
Mend reshape-based habits with plyr: melt/cast vs. ddply
原文:Mend reshape-based habits with plyr: melt/cast vs. ddply
原文:Mend reshape-based habits with plyr: melt/cast vs. ddply
I m kind-of used to do melt and cast all the time, and this time I m looking for neat one-liner. require(reshape) # first I melt some data: m <- melt(mtcars, id.vars = c("cyl", "am"), measure.vars ...
利用R的Plyr, 功能复杂,可回归多种变量
原文:Using Plyr in R with a complex function that returns multiple variable
原文:Using Plyr in R with a complex function that returns multiple variable
我有一套数据,有三种分类变量:状况、次和延迟。 这里是我的数据的简化版本(实时数据更长)。
在R数据框架的每一行中进行细微操作
原文:doing a plyr operation on every row of a data frame in R
原文:doing a plyr operation on every row of a data frame in R
我与Plyr syntax一样。 任何时候,我都必须使用其中的一条,命令我停止踢狗,并投入3天。 因此,为了我的礼仪和我的肝脏,简明的yn子......。
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