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R Data Analysis Cookbook - Second Edition by Kuntal Ganguly

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Concatenating the list of data frames into a big data frame

Run the following commands:

> autos <- list(auto, auto) 
> big.df <- ldply(autos, I) 

The ldply function takes a list input and spits out a data frame output. The identity function I returns the input as is. If the input is a list, then there is no split by argument; each list element is passed as an argument to the function.

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