how to introduce missing data for complete data
1. You need to define more explicitly exactly what you mean by "randomly." 2. You need to make an honest effort to learn basic R, e.g. by spending time with the "Introduction to R" document that ships with R or an online tutorial (there are many good ones). Cheers, Bert
On Sun, Nov 10, 2013 at 10:31 PM, dila radi <dilaradi21 at gmail.com> wrote:
Hi,
Im new R users. In my research I use rainfall data and Im interested in
estimating missing data. I would like to use Normal Ratio Method to
estimate missing data. My problem is, how do I introduce missing data
randomly within my complete set of data?
Stn ID Year Mth Day Amount
48603 71 1 1 1
48603 71 1 2 0.5
48603 71 1 3 1.3
48603 71 1 4 0.8
48603 71 1 5 0
48603 71 1 6 0
48603 71 1 7 0
...
Thank you so much for your attention and help.
Regards,
Dila
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Bert Gunter Genentech Nonclinical Biostatistics (650) 467-7374