To create covariance matrix for data frame in R, you can use **cov()** function.

The following method shows how you can do it with syntax.

**Method: Use cov() Function**

```
cov(df)
```

The following example shows how to create covariance matrix in R using **cov()** function.

## Create Covariance Matrix for R Data Frame Using cov() Function

Let’s see how we can use create covariance matrix in R:

```
# Create data frame
df <- data.frame(Value = c(108,120,135,95,98,105),Reading= c(110,97,91,89,80,85))
# Create covariance matrix
matrix <- cov(df)
# Print covariance matrix
print(matrix)
```

Output:

```
Value Reading
Value 224.5667 42.6
Reading 42.6000 110.4
```

Here the output shows covariance matrix for data frame *df*.