4 messages · bbslover, Steven Kang, Dieter Menne
In my disk C:/ have 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!
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In my disk C:/ have 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 ?
as.matrix should do the job; if it does not (second example), you probably have rownames or some other string in your data set. Dieter # use read.csv instead x = data.frame(a=1:10,b=11:20) xm = as.matrix(x) str(xm) xm # looks good x1 = data.frame(a=1:10,b=11:20,c=letters[1:10]) xm1 = as.matrix(x1) str(xm1) xm1 # looks strange, because it's all strings
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thank you for your help,it is a good way.
can try matrix.x <- as.matrix(x) On Mon, Nov 2, 2009 at 8:38 PM, bbslover <dluthm at yeah.net> wrote:
In my disk C:/ have 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!
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