[R] Handle missing values

From: Francisco Pastor <paco_at_ceam.es>
Date: Mon, 23 Jun 2008 11:35:10 +0200


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.

-- 
---------------------------------------------------------------
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
---------------------------------------------------------------
Usuario Linux registrado: 363952

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Received on Mon 23 Jun 2008 - 09:39:03 GMT

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