How to convert entire dataframe to numeric while preserving decimals?

Question

I have a mixed class dataframe (numeric and factor) where I am trying to convert the entire data frame to numeric. The following illustrates the type of data I am working w

Answer 1

Using dplyr (a bit like sapply..)

df2 <- mutate_all(df1, function(x) as.numeric(as.character(x)))

which gives:

glimpse(df2)
Observations: 4
Variables: 2
$ a  0.01, 0.02, 0.03, 0.04
$ b  2, 4, 5, 7

from your df1 which was:

glimpse(df1)
Observations: 4
Variables: 2
$ a  0.01, 0.02, 0.03, 0.04
$ b  2, 4, 5, 7