On 23.01.2016 01:21, Robert Sherry wrote:
In R, I run the following commands:
df = data.frame( x=runif(10), y=runif(10) )
df2 = df[order(x),]
You use another x from your workspace, you actually want to
df2 = df[order(df[,"x"]),]
Best,
Uwe Ligges
The first, as I would expect, creates a data frame with two columns and
10 rows. I expect the second to sort the data based upon
the columns x and produce a new data frame, df2, with the same size as
df. However, the data frame is produces is much larger.
I do not understand what is going on. I am hoping somebody can help me.
I am also wondering if I should have a comma after
order(x) in the second statement. I do not see a purpose for it but it
was in an example on the web.
Thanks
Bob
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______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
