rdata.tablelm

How to remove a data table with 0 nrows from a list in R?

I have a list of list with several data tables. I wanted to use lm() function between two variables in all data tables, but I have some empty data tables.

So, I have decided to remove those data tables that dont have anything. How I can remove the data tables with 0 nrows from my list?

Many thanks

Solution

  • use the function

    Filter(nrow, df_list)

    For example:

    df_list <- list(head(iris), data.frame(), tail(iris), data.frame(), head(trees))
Filter(nrow, df_list)

[[1]]
  Sepal.Length Sepal.Width Petal.Length Petal.Width Species
1          5.1         3.5          1.4         0.2  setosa
2          4.9         3.0          1.4         0.2  setosa
3          4.7         3.2          1.3         0.2  setosa
4          4.6         3.1          1.5         0.2  setosa
5          5.0         3.6          1.4         0.2  setosa
6          5.4         3.9          1.7         0.4  setosa

[[2]]
    Sepal.Length Sepal.Width Petal.Length Petal.Width   Species
145          6.7         3.3          5.7         2.5 virginica
146          6.7         3.0          5.2         2.3 virginica
147          6.3         2.5          5.0         1.9 virginica
148          6.5         3.0          5.2         2.0 virginica
149          6.2         3.4          5.4         2.3 virginica
150          5.9         3.0          5.1         1.8 virginica

[[3]]
  Girth Height Volume
1   8.3     70   10.3
2   8.6     65   10.3
3   8.8     63   10.2
4  10.5     72   16.4
5  10.7     81   18.8
6  10.8     83   19.7