R shiny 使用paste0 換行問題

r paste0 model r shiny shiny

phes11434 2021-04-12 03:02:16 ‧ 1356 瀏覽

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測試程式碼如下

data = data.frame("id" = c(1,2,3), "y1" = c("f1","f2","f2"), "x1" = c("pd1","pd2","pd3"))
y1 = unique(data$y1)
a = c()
for(i in 1:length(y1)){
  #print(y1[i])
  #i = 2
  dd = data[data$y1==y1[i],]
  str2 = ""
  str1 = paste0(y1[i],"=~")
  for (k in 1:dim(dd)[1]) {
    
    if(k == dim(dd)[1]){
      str2 = paste0(str2,dd$x1[k])
    }else{
      str2 = paste0(str2,dd$x1[k],"+")
    }
  }
  a[i] = paste0(str1,str2)
}



b = ""
for (i in 1:length(a)) {
  b = paste0(b,a[i]," ")
}
print(b)

最終b會呈現 "f1=~pd1 f2=~pd2+pd3 "
但是在建立model時似乎需要將其變成
"f1=~pd1
f2=~pd2+pd3 "

請問是否有方法能夠做到？