On 04/19/2011 07:39 PM, Simone Gabbriellini wrote:
Hello List,

I have a data frame like:

        V130    V131    V132    V133    V134    V135    V136
1       0               0               0.9             0               0.9     
        0               0
2       0               0               0                       0               
0               0.8
3       0               0               0              0                0.9     
        0               0
4       0.9             0               0              0                0       
        0               0.9
5       0               0                               0                       
                        
6       0               0               0               0.9             0       
        0               0.9
7       0               0               0.8             0              0        
        0               0
8       0.9             0                               0               0.9     
        0.8             0
9       0               0               0               0.9             0.9     
        0               0
10      0               0               0               0               0       
        0               0.9

I would like to fill the empty cells with a 0... how to address those empty 
cells?

Hi Simone,
I'm somewhat surprised that the empty cells aren't displayed as "NA". If they are in fact NAs, you could use:

mydataframe[is.na(mydataframe)]<-0

Jim

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