[英]Subsetting two factors in R
I have a huge dataset, and I have a column called season. 我有一个庞大的数据集,并且有一列称为Season。 There are 4 seasons ie Winter, Spring, Summer and Autumn.
有四个季节,即冬季,春季,夏季和秋季。
Region Year Male Female Area DATE Day Month Season
WEST 1996 0 1 4 06-04-96 Saturday April Spring
EAST 1996 0 1 16 29-06-96 Saturday June Summer
WEST 1996 0 1 4 19-10-96 Saturday October Winter
WEST 1996 0 1 4 20-10-96 Sunday October Winter
EAST 1996 0 1 16 01-11-96 Friday November Winter
EAST 1996 0 1 16 11-11-96 Monday November Winter
WEST 1996 0 1 4 19-11-96 Tuesday November Winter
WEST 1996 0 1 4 28-11-96 Thursday November Winter
WEST 1996 0 1 4 10-12-96 Tuesday December Winter
WEST 1997 0 1 4 17-01-97 Friday January Winter
WEST 1997 0 1 4 28-03-97 Friday March Spring
So I am trying to create a subset where I want R to show me entries with season as Winter and Autumn. 因此,我尝试创建一个子集,在该子集中,我希望R向我显示冬季和秋季作为季节的条目。
I created a subset first of the portion I want. 我首先创建了想要的部分的子集。
secondphase<-subset(eb1, Area>16)
now from this subset, I want where Season is Winter and Autumn. 现在从这个子集中,我想要季节是冬季和秋季。
I tried these codes- 我尝试了这些代码-
th2<-subset(secondphase, Season== "Winter")
th3<-subset(secondphase, Season=="Autumn")
Now is there a way to merge these two subsets? 现在有没有办法合并这两个子集? or create a subset where I can select the conditions where I want area>16, season should be Winter and autumn.
或创建一个子集,在该子集中我可以选择希望区域> 16的条件,季节应该是冬季和秋季。
Thanks for the Help. 谢谢您的帮助。
您还可以将dplyr软件包与filter函数一起使用
filter(secondphase, grepl("Winter|Autumn", Season))
Method 1 方法1
my_subset <- eb1[eb1$Season %in% c("Winter", "Autumn") & eb1$Area > 16,]
Method 2 方法2
th2 <- subset(secondphase, Season== "Winter")
th3 <- subset(secondphase, Season=="Autumn")
final <- rbind(th2, th3)
Method 3 方法3
final <-subset(eb1[eb1$Area > 16,], Season== "Winter" | Season=="Autumn")
With a data.table
approach, 使用
data.table
方法
library("data.table")
DT<-data.table(eb1)
subsetDT<-subset(DT, Season %in% c("Autmn","Winter") & Area > 16)
does the job. 做这份工作。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.