Hi
Newbie question:
I have a set of data frames that I want to do the same calculations on each.
I've found out that I can put them in a list and loop through the list
to do the calculation, but not put the results back into each
data.frame..
For example three data frames cats, dogs, birds
where >cats
name eats_kg
1 bob 3
2 garfield 4
3 chuck 6
and dogs and birds are similar but not same length.
On each data frame I now want to add a column with cost of food by
calculating "eats_kg"*price of food.
So question is, can I put all data frames into one loop which returns
a new column for each?
Ive tried
MyList <- list(cast,dog,birds)
for(i in 1:length(MyList)){
price <- as.data.frame(myList[i])[,2] * cost
.. and then Im stuck. How can I put "price" back into each data frame?
Thanks in advance.
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