[R] Handle missing values

[Francisco Pastor]

Hi everyone

I am new to R and have a question about missing values. I am trying to 
do a cluster analysis of monthly temperatures and my data are 14 columns 
with spatial coordinates (lat,lon) and 12 monthly values:

/lat  -  lon  -  temp1  -  //temp2  -  temp3 - ....   -  //temp12/

If I omit missing values (my missing values are 99.00) with

/mydata <- na.omit(mydata)/

every row with a missing value (i.e. eleven good temperature values and 
one month missing) is deleted. I would like to retain all valid values 
for the k-means analysis but excluding.

I've been trying and searching about na.omit, na.action, na.exclude but 
can't find the right point.

Any help would be appreciated.

-- 
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Francisco Pastor
Meteorology department
Fundación CEAM
paco at ceam.es
http://www.ceam.es/ceamet - http://www.ceam.es
Parque Tecnologico, C/ Charles R. Darwin, 14
46980 PATERNA (Valencia), Spain
Tlf. 96 131 82 27 - Fax. 96 131 81 90
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