How to change levels?
Hi, see ?droplevels and/or the "stringsAsFactors" section of ?options Best, Ista
On Wed, Jan 16, 2013 at 4:56 AM, paladini <paladini at beuth-hochschule.de> wrote:
Hello! I have got a dataframe with 10 columns and 100 rows. The seventh column consists of a lot of country names. When I use newdata=subset(data, data[, 7]=="United Kingdom"|data[, 7]=="Germany") I get just the rows where the country name is UK or Germany. But the level information doesn`t change. That means if I use levels(newdata[,7]), I get: [1] "Austria" "Belgium" [3] "Denmark" "Finland" [5] "France" "Germany" [7] "Spain" "Sweden" [9] "Switzerland" "The Netherlands" [11] "United Kingdom" "United States of America" That leads to problems in the further data processing . How can I change the level information to the real levels of newdata? Thanking you in anticipation Claudia
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