One error you may encounter in R is:

Error in x[, 3] : incorrect number of dimensions

This error occurs when you attempt to subset some object in R by more dimensions than the object has.

This tutorial shares exactly how to fix this error.

**How to Reproduce the Error**

Suppose we have the following vector in R with 10 values:

#define vector x <- c(3, 4, 7, 7, 14, 19, 22, 28, 29, 30)

The vector is one-dimensional, but suppose we attempt to subset by two dimensions:

#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

We receive an error because we attempted to subset by two dimensions when the vector only has one dimension.

**How to Fix the Error**

The easiest way to fix this error is to simply subset by one dimension. For example, here’s how to access the third value in the vector:

#access third value in vector x[3] [1] 7

We can also access several values in the vector at once. For example, here’s how to access the values in positions 2 through 5 in the vector:

#access values in positions 2 through 5 x[2:5] [1] 4 7 7 14

Since we subset by only one dimension, we avoid the **incorrect number of dimensions** error.

**Additional Resources**

How to Fix in R: NAs Introduced by Coercion

How to Fix in R: Subscript out of bounds

How to Fix in R: longer object length is not a multiple of shorter object length

How to Fix in R: number of items to replace is not a multiple of replacement length