[R] find the data frames in list of objects and make a list of them

[Matthew]

Hi everyone,

    I would like the find which objects are data frames in all the 
objects I have created ( in other words in what you get when you type: 
ls()  ), then I would like to make a list of these data frames.

Explained in other words; after typing ls(), you get the names of 
objects. Which objects are data frames ?  How to then make a list of 
these data frames.

    A second question: is this the best way to make a list of data 
frames without having to manually type c(dataframe1, dataframe2, ...)  ?

Matthew