Suppose you have Sales data like this. Now you want to calculate the skewness of all the numeric columns such as “Sales”, “Quantity” etc. Here is how.

## Install “moments” package (You need this only for the 1st time.)

- Open the “Manage R Package” dialog from the project menu.

- Choose “Install New Packages”, type in “moments” and click “Install”.

## Calculate skewness for all the numeric columns.

- Select “Custom R Command” from the + button.

- Type in the command following to calculate skewness for each numeric column by “moments::skewness” function.

```
summarize(across(
is.numeric,
list(skewness = ~ moments::skewness(.x, na.rm = TRUE))
))
```

Now you get the skewness for all the numeric columns in the data frame.