Re: [R] Questions on Data reading using zoo package

2012-02-21 Thread Gabor Grothendieck
On Tue, Feb 21, 2012 at 2:25 AM, jpm miao wrote: > Hello, > >   I try to handle the data using read.csv , zoo and aggregate functions. > The data contains NA values. After aggregating monthly data into quarterly > data, all data become NA. Is it because I don't properly aggregate the data >  in th

[R] Questions on Data reading using zoo package

2012-02-20 Thread jpm miao
Hello, I try to handle the data using read.csv , zoo and aggregate functions. The data contains NA values. After aggregating monthly data into quarterly data, all data become NA. Is it because I don't properly aggregate the data in the presence of NAs? What can I do? Another problem is t