Hi
everyone,
I have
a dataset which I am handling with
R . Unfortunately I have two kinds of empty cells, one corresponds to missing
values and the other one is empty because it has to.
I m going
to put an example (just a part of my dataset ) to try to clarify my question:
missing
values are represented withNAs
Enterprise
Data of Stablishment Earnings
2005 earning
2006 earnings 2007 earning 2008
Enterprise
1
05/06/2007
It has to be empty It has to be
empty
2,3
NA
Enterprise
2
09/08/2005
2.3
3,6
NA
1.6
My intention is to find this missing values using imputation (library VIM) .
How could
I differenciate this NA with Cells that have to be empty?? I have tried putting
Na for missing values and Nan for the others but it doesn't work because R
imputes everythitng.
Could you answer me
to this e-mail
Thanks in
advance
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