How to ignore data

Ben Bolker · 2010-12-13T16:30:55Z

Steve Sidney mweb.co.za> writes: > > Dear list > > I have quite a small data set in which I need to have the following > values ignored - not used when performing an analysis but they need to > be included later in the report that I write. > > Can anyone help with a suggestion as to how this can be accomplished > > Values to be ignored > > 0 - zero and 1 this is in addition to NA (null) > > The reason is that I need to use the log10 of the values when performing > the ca

Ben Bolker

Mon, Dec 13, 2010 8:30 AM

Steve Sidney <sbsidney <at> mweb.co.za> writes:

It would help to have a more precise/reproducible example, but if
your data set (a data frame) is d, and you want to ignore cases where
the response variable x is either 0 or 1, you could say

  ds <- subset(d,!x %in% c(0,1))

Some modeling functions (such as lm()), but not all of them, have
a 'subset' argument so you can provide this criterion on the fly:

 lm(...,subset=(!x %in% c(0,1)))

How to ignore data

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