for loop, error in model frame.default ... variable lengths differ
Hi You did not provide data but I can see some problems in your code. See inline.
I'm failing to get a for loop working. I'm sure it's something simple,
and I
have found some posts relating to it, but I'm just not understanding why this isn't working. I have a data frame and would like to loop through specific column
names,
using aggregate() within a for loop. There are NA's scattered
throughout
the data frame and I'm thinking it has something to do with that, but I
haven't been able to fix it.
vars <- colnames(df)[c(10,12,16,18,20,21,24:29,45)]
for(i in 1:length(vars)) {
So i is actually values from 1 to length of vars variable.
aggregate(colnames(df)[i] ~ x1 + x2 + x3, df, mean,
and you select variables from df[,1] to df[, length(vars)], which is probably not what you want. What is x1-x3? are they variables in df?
na.action=na.exclude)
for mean the correct statement is na.rm=TRUE
} I get this error: Error in model.frame.default(formula = colnames(df)[i] ~ x1 + x2 + : variable lengths differ (found for 'x1')
Maybe x1 has different length as df. What length(x1) and dim(df) tells you? Regards Petr
There are probably much better ways to do this, and I would be happy to
get
suggestions, but mostly I would like to know why the code isn't working. Thanks- Peter -- View this message in context: http://r.789695.n4.nabble.com/for-loop- error-in-model-frame-default-variable-lengths-differ-tp4630698.html Sent from the R help mailing list archive at Nabble.com.
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