> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of uday
> Error in rowSums(a[, 2] == -999.99) :
> 'x' must be an array of at least two dimensions
Indeed it must - but you have asked for rowSums on a one-dimensinal object
(a[,2]). You didn;t need to sum the rows of that.
Try
a[ a[,2] != -999 , ]
assuming that the column is integer or that you have read the Note on finite
representation of ractions in ?Comparison and are willing to take your chances,
or
a[ a[,2] > -998 , ]
if it's not and if it's safe to assume that all large negative numbers are
'missing'.
Better still, if you read the data using read.table, use na.strings=c('"-999",
"NA") . That will mark "-999" as missing data. An na.omit will then remove the
offending rows (but also those that contain NAs of thre reasons.
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