On Sat, 21 Mar 2009, Ken-JP wrote:
require( zoo ) inp <- c( 5, 9, 4, 2, 1 ); m <- zoo( cbind( inp ), as.Date("2003-02-01") + (0:(length(inp)-1))); dim( m ) # [1] 5 1 dim( m[1,,drop=FALSE] ) # [1] 1 1 - ok dim( lag( m, -1 )) # [1] 4 1 - ok dim( rbind( m[1,,drop=FALSE], lag(m,-1) )) # NULL - converted from zoo matrix to zoo vector!?!? # any way to keep the last line as a zoo matrix???
This was a problem in the rbind() method, I've just commited a fix to the devel-version on R-Forge.
Thanks for the report, Z
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______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.