Web拉姆纳特的解释完全正确。但我会详细说明一下. ddply 要求输入一个数据帧,然后返回一个数据帧。 lm() 函数接受一个数据帧作为输入,但返回一个线性模型对象。 WebFor each subset of a data frame, apply function then combine results into a list. dlply is similar to by except that the results are returned in a different format. To apply a function for each row, use alply with .margins set to 1.
dlply function - RDocumentation
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WebI want to use the ddply to compute the income for each Y(not X), if I have four observations for each Y (for example for 2281223 with months 6,9,12 of 2010 and month 3 of 2011). If I have less than four observations (for example for Y =228130), I want to simply ignore it. I use the following commands in R for the above purpose: WebDec 6, 2024 · apply()函数是所有集合中最基本的。. 我们还将学习sapply(),lapply()和tapply()。. apply集合可以看作是循环的替代品。. 如果将R与Anaconda一起安装,则apply()集合与 R基本 软件包捆绑在一起。. apply()函数可以提供许多函数,以对对象(数据框,列表 ... Web在 r 中找不到函数 ddply. 错误:找不到函数“ddply” 记录的 R 主题:R 主题使用 ddply 的一些示例 - 查看列名 ddply (mtcars, "cyl" 注意:plyr 函数不保留行。. 名称不能为摘要函数。. 用法不起作用,因为 mutate 在当前范围内找不到标签。. 但是在加载库(ggplot2)之后 ... sonning avenue litherland postcode