嗨:我有三个连续因变量和一个三个变量的自变量。我想看看每个国家的y1到y6~x1的系数是多少。有没有办法用dplyr和扫帚整齐地做到这一点?我知道dplyr相当不错,但我是扫帚的新手。
#one random independent variable
x1<-rnorm(100, mean=5, sd=1)
#one random dependent variable
y1<-rnorm(100, mean=2, sd=2)
#two random dependent variables, in reality I have six
y2<-rnorm(100, mean=3, sd=1)
#Grouping variable.
country<-sample(seq(1,3,1), size=100, replace=T)
#data frame
df<-data.frame(x1, y1, y2, country)
#I would like to see what the coefficients are for y1~x1
and then y2 ~x2 for country 1, country 2, country 3, etc.
library(dplyr)
#Fit one model for each of three countries
test<-df%>%
group_by(country) %>%
do(mod.y1=lm(y1~x1, data=.))
#print results
test$mod.y1
答案 0 :(得分:0)
您可以使用来自tidyr的gather
和来自扫帚的tidy
的组合。首先,不是为每个国家/地区做一个适合,而是为y1
/ y2
和国家/地区的每个组合做一个适合:
library(tidyr)
library(broom)
fits <- df %>%
gather(variable, value, y1, y2) %>%
group_by(country, variable) %>%
do(mod = lm(value ~ x1, .))
然后你可以整理它们(使用扫帚)并过滤掉拦截术语:
td <- tidy(fits, mod) %>%
filter(term != "(Intecept)")
这为您提供了一个如下所示的数据框td
:
Source: local data frame [6 x 7]
Groups: country, variable [6]
country variable term estimate std.error statistic p.value
(dbl) (chr) (chr) (dbl) (dbl) (dbl) (dbl)
1 1 y1 x1 0.106140467 0.3835857 0.27670599 0.7835458
2 1 y2 x1 -0.004725751 0.1837192 -0.02572268 0.9796168
3 2 y1 x1 -0.193700062 0.4690913 -0.41292614 0.6826979
4 2 y2 x1 0.094083592 0.2024151 0.46480518 0.6455421
5 3 y1 x1 -0.223523980 0.3820297 -0.58509584 0.5631692
6 3 y2 x1 -0.029720338 0.2116219 -0.14044074 0.8893172
您的estimate
列是估算系数。