The aggregate function is more difficult to use, but it is included in the base R installation and does not require the installation of another package. # Get a count of number of subjects in each category (sex*condition) cdata <- aggregate(data["subject"], by=data[c("sex","condition"...
R语言aggregategroup R语言中的aggregate函数是用于按照指定的分组变量对数据进行聚合操作的功能。在这篇文章中,我将向你展示如何使用aggregate函数来实现R语言的分组聚合操作。 首先,让我们来看一下整个实现过程的流程。我将使用表格来展示每个步骤以及需要做的事情。 | 步骤 | 事项 | | --- | --- | | 1 |...
1.介绍 R中aggregate函数的功能强大,它首先将数据进行分组(按行),然后对每一组数据进行函数统计,最后把结果组合成一个比较nice的表格返回。简单说有点类似sql语言中的group by,可以按照要求把数据打组聚合,然后对聚合以后的数据进行加和、求平均等各种操作。 2.详解 通过mtcars 数据集的操作对这个函数进行简单了解。
>aggregate(mtcars,by=list(cyl), FUN=mean)Group.1mpg cyl disp hp drat wt qsec vs am gear carb1426.663644105.136482.636364.0709092.28572719.137270.90909090.72727274.0909091.5454552619.742866183.3143122.285713.5857143.11714317.977140.57142860.42857143.8571433.4285713815.100008353.1000209.214293.2292863.99921416.772140.00000000....
by参数也可以包含多个类型的因⼦，得到的就是每个不同因⼦组合的统计结果：> aggregate(mtcars, by=list(cyl, gear), FUN=mean)Group.1 Group.2 mpg cyl disp hp drat wt qsec vs am gear carb 1 4 3 21.500 4 120.1000 97.0000 3.700000 2.465000 20.0100 1.0 0.00 3 1.000000 2 6 3...
如果 by 有名称,则非空时间用于标记结果中的列,未命名的分组变量被命名为 Group.i for by[[i]]。 警告 第一个论点"formula"方法被命名为formula而不是x之前R4.2.0。可移植用途不应命名该参数。 例子 ## Compute the averages for the variables in 'state.x77', grouped ## according to the region (...
Aggregate stability and size distribution. (in) methods of soil analysis. Part 1 来自 ResearchGate 喜欢 0 阅读量: 233 作者:WD Kemper,RC Rosenau 摘要: An aggregate is a group of primary particles that cohere to each other more strongly than to other surrounding soil particles. Most adjacent ...
ロングマン現代英英辞典より 関連するトピック:Industryag‧gre‧gate1/ˈæɡrɪɡət/AWLnounformal1[countable]thetotalafter a lot of differentfiguresor points have beenaddedtogetheraggregate ofThe smaller minorities got an aggregate of 1,327 votes.In the aggregate(=as a group or in...
This example describes a UDA that finds the maximum value in the specified group. Enter the following code in the/tmp/maxae.Rfile: nz.mode <-'aggregate'nz.init <-function(){ setOutputNull(0) } nz.accum <-function(){ input <- getInputColumn(0)if(is.null(input))return() state <-...
R语言aggregat函数FUN r语言aggregate函数用法 概述aggregate函数应该是数据处理中常用到的函数,简单说有点类似sql语言中的group by,可以按照要求把数据打组聚合,然后对聚合以后的数据进行加和、求平均等各种操作。x=data.frame(name=c("张三","李四","王五","赵六"),sex=c("M","M","F","F"),age=c(...