### Filter element in a column-list with `fd_filter`
```{r filter}
fd_filter(DFD, "B", 3)
```
...
...
@@ -71,3 +70,25 @@ DFD
# apply 'fd_melt'
fd_melt(DFD, "B", "B2", keep = list("A", "C"))
```
### Join a list of data frame to a single data frame
We can bind and join a list of `data.frame`, `y`, with a single `data.frame`, `x`, when the number of row of the data.frame `x` is the same as the length of the list `y`