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...e a a.csv file, I want to read it to R, importantly, when I use x=read.csv("C:/a.csv") ,the x format is data.frame, I want to it to become matrix format, how can I do it ? thank you! -- View this message in context: http://old.nabble.com/how-can-I-convert-.csv-format-to-matrix----tp26156643p26156643.html Sent from the R help mailing list archive at Nabble.com.