[R] How to delete matrix rows based on NA frequency?

[Henrique Dallazuanna]

Try this:

m[prop.table(rowSums(is.na(m))) < 0.1,]

2010/1/15 Joel Fürstenberg-Hägg <joel_furstenberg_hagg at hotmail.com>:
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> Hi all,
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> I would like to remove rows from a matrix, based on the frequency of missing values. If there are more than 10 % missing values, the row should be deleted.
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> I use the following to calculate the frequencies, thereby getting a new matrix with the frequencies:
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> freqNA=rowMeans(is.na(exprdata))
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> But is there a shorter way to remove the rows based on "(1-freqNA)>0.1" than looping through the whole matrix using a for loop?
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> All the best,
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> Joel
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-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O