Error in if (x[i] == NA) { : missing value where TRUE/FALSE needed

Posted 2022-04-12 Data+Science+Insight

Error in if (x[i] == NA) : missing value where TRUE/FALSE needed

目录

Error in if (x[i] == NA) : missing value where TRUE/FALSE needed

问题：

解决：

完整错误：

---

问题：

x[i] == NA这个语法是有问题的；

正确的方式是：is.na(x[i])

#define vector with some missing values
x <- c(2, NA, 5, 6, NA, 15, 19)

#loop through vector and print "missing" each time an NA value is encountered
for(i in 1:length(x)) 
 
 if (x[i] == NA) 
    print('Missing')
  

解决：

is.na(x[i])

#define vector with some missing values
x <- c(2, NA, 5, 6, NA, 15, 19)

#loop through vector and print "missing" each time an NA value is encountered
for(i in 1:length(x)) 
 
 if (is.na(x[i])) 
    print('Missing')
  

完整错误：

> #define vector with some missing values
> x <- c(2, NA, 5, 6, NA, 15, 19)
> 
> #loop through vector and print "missing" each time an NA value is encountered
> for(i in 1:length(x))
+     
+     if (x[i] == NA)
+         print('Missing')
+    
+
Error in if (x[i] == NA) : missing value where TRUE/FALSE needed
>