R：使用％＆gt;％到group_by（id）进行关联

Question

我想在我的实验中计算每个参与者（称为A和B）的两个HeartRate和roomCO2Interp之间的互相关：

set.seed(395)
library(dplyr)

df2 <- data.frame(HeartRate= c(cumsum(rnorm(32*60*36,0,0.01)),
                               cumsum(rnorm(32*60*36,0,0.01))),
                  roomCO2Interp= c(cumsum(rnorm(32*60*36,0,0.01)),
                               cumsum(rnorm(32*60*36,0,0.01))),
                  ID = rep(c("A","B"), each=32*60*36))

我试图将pipe参数用于group_by（id），但它似乎无法正常工作：

crossCor<-df2 %>% group_by(id)%>%
  summarise(ccf(diff(roomCO2Interp), diff(HeartRate), type="correlation"))

Error in summarise_impl(.data, dots) : expecting a single value