Btibert3 - 8 months ago 66

R Question

I have a nested list of data. Its length is 132 and each item is a list of length 20. Is there a *quick* way to convert this structure into a data frame that has 132 rows and 20 columns of data?

I am new to R, so I figure there is probably an easy way to do this. I searched here on Stack Overflow and couldnâ€™t find a similar question, so I apologize if I missed it. Some sample data:

`l <- replicate(`

132,

list(sample(letters, 20)),

simplify = FALSE

)

Answer

Assuming your list of lists is called `l`

:

```
df <- data.frame(matrix(unlist(l), nrow=132, byrow=T))
```

The above will convert all character columns to factors, to avoid this you can add a parameter to the data.frame() call:

```
df <- data.frame(matrix(unlist(l), nrow=132, byrow=T),stringsAsFactors=FALSE)
```

Source (Stackoverflow)