kableextra中的垂直对齐方式

Question

我在Kableextra中对齐结果时遇到一些麻烦。

---
title: "Report test 1"
author: "Adam"
date: "May 9, 2019"
output: pdf_document
---

COLLEGE: College of Education

DEPARTMENT: Office of Assessment and Accreditation

SEMESTER: Fall 2018

SECTION 1:  Please provide the mean and frequency distribution of the two required questions for all Traditional Delivery Courses. NOTE:  The MEAN and N is required. The Frequency is optional.  

x<-c(45,2,8,10,32,33)
y<-c(2,3,3,3,3,3)
EDLP_D.1<-cbind(x,y)

colnames(EDLP_D.1)<- c("Sheet", "Please indicate your level of satisfaction with the availability of the instructor outside the classroom. (In selecting your rating, consider the instructor's availability via established office hours, appointments, and opportunities for face-to-face interaction as well and as via telephones, e-mail, fax, and other means") 

#function to compute values needed for table 
vec_fun4 <- function(x,y){
  Vec <-c(colnames(x[,y]),round(mean(x[[y]]),2),length(which(!is.na(x[,y]==F))),length(which(x[,y]==1)),length(which(x[,y]==2)),length(which(x[,y]==3)),length(which(x[,y]==4)))
  return(Vec)   
}

#Switch from long format to wide format
item2.1 <- as.data.frame(t(as.matrix(vec_fun4(EDLP_D.1,1))))

#Make table
library(kableExtra)

kable(item2.1,"latex" ,booktabs=T, align = "lcccccc", col.names=linebreak(c(' ','Mean','\\textit{N}' ,'Strongly\n Disagree','Disagree','Agree','Strongly\n Agree')),row.names = F,escape=F) %>% 
  column_spec(1, width = "20em" )

我希望数值在其单元格中水平和垂直居中。

我在这里附上了表格的副本

Answer 1

我的观点不足以发表评论。我遇到了同样的问题，您有没有解决？