[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
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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