Error in ** : incorrect number of dimensions

问题：

解决：

完整错误：

问题：

#向量是一维的，尝试使用二维数据集来进行索引，当然不行；

#define vector
x <- c(3, 4, 7, 7, 14, 19, 22, 28, 29, 30)#attempt to access value in first row and third column
x[ , 3]#attempt to access value in third row and first column
x[3, ]

解决：

#按照一维的方式来索引

#access third value in vector
x[3]#access values in positions 2 through 5
x[2:5]

完整错误：

> #define vector
> x <- c(3, 4, 7, 7, 14, 19, 22, 28, 29, 30)
>
> #attempt to access value in first row and third column
> x[ , 3]
Error in x[, 3] : incorrect number of dimensions
>
> #attempt to access value in third row and first column
> x[3, ]
Error in x[3, ] : incorrect number of dimensions
>

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Error in ** : incorrect number of dimensions

Error in ** : incorrect number of dimensions

问题：

解决：

完整错误：

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