[R] Help using order with data.frame

[Jeff Newmiller]

It is not order that you are having difficulty with... it is name scope. Your "z" is not a standalone variable, but a column in your "t" data frame.

Try

t[order(t$z), ]

Note that "t" is the name of a commonly-used function in R that transposes matrices. It is generally not a good idea to reuse names like that, but it can be puzzling to avoid when you are new. I type the name of the variable I want to create alone on an interactive R console before I create it... if it tells me that variable is not defined then I proceed.

You should also avoid posting HTML email to this list, as what we see is often not what you see. Read the Posting Guide for more useful advice on using the list.

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On March 15, 2014 9:21:41 PM PDT, Jason Rupert <jasonkrupert at yahoo.com> wrote:
>Evidently, I'm overlooking something simple.� I'm trying to used order
>with data.frame. � 
>
>
>For example: 
>
>t = data.frame(x = c(11,12,14), y = c(19,20,21), z = c(10,9,7))
>t[order(z), ]
>Error in order(z) : object 'z' not found
>
>Thank you for any insights and advice provided. 
>	[[alternative HTML version deleted]]
>
>
>
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