Hi,
I have data frame like this:
Product Price Year_Month PE
A 100 201012 -2
A 98 201101 -3
A 97 201102 -2.5
B 110 201101 -1
B 100 201102 -2
B 90 201103 -4
How can I achieve the following result using R:
Product Price Year_Month PE
A 97 201102 -2.5
B 90 201103 -4
in other words, list the all products' information of the latest month?
Thanks for your help.
Kind regards,
Lingyi
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