r - R中的双循环

Question

for(i in 0:3) {
    for (j in quantile(0:80,probs=c(0,0.33,0.67,1))) {
        print(paste(i,j,sep=","))
    }
}

产生：

"0,0"  
"0,26.4"  
"0,53.6"  
"0,80"  
"1,0"  
"1,26.4"  
.  
.  
.  

像下面这样生成怎么样：

"0,0"  
"1,26.4"  
"2,53.6"  
"3,80"  
?  

Answer 1

你真的不需要for循环：

paste(0:3,quantile(0:80,probs=c(0,0.33,0.67,1)),sep=",")

给出：

[1] "0,0"    "1,26.4" "2,53.6" "3,80"  

如果你想以这种特定方式打印它，你可以循环这个结果并打印。