Hello dear R-users,

I have a tricky problem of data manipulation with R. Although it seems

very easy, I can not solve it by myselves.

The problem is a variable in my dataset is usually be readed as

"factor" (variable mode), however I want it be a "numeric" one. I want

to know how can I define an variable/column in a dataframe as numeric

mode, after I imported a large dataset using read.delim() from a txt

file.

Thanks a lot in advance.

Mao J-F
State Key Lab of Systematics and Evolutionary Botany
Institute of Botany
Chinese Academy of Sciences
Beijing, China

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