[R] Sorting Numeric and Character Data

From: Thomas Hopper <tomhopper_at_comcast.net>
Date: Sat 22 Oct 2005 - 12:34:11 EST


Hello,

I have what seems like an easy question to answer, but I'm struggling with it.

I have a set of categorical data that I am reading in, looking something like:

"category" "result"
"A" .234
"B" .123
"C" .564
"D" -.452
"E" .112
"F" -.106

I'd like to plot this twice on two separate dot charts, once with the data ordered in ascending order by the "category" (character) column; the other graph ordered in descending order by the "result" (numeric) column.

My trouble is this: if I read this in as a data frame, I can order it using something like data[order(d3$result),], but the "category" column seems to get converted to an integer data type, which then plots as numbers rather than letters on the dotchart(). If I read it in as separate vector columns using scan() and copy-and-paste, I don't know how to order both vectors together (such that "A" and .234 remain together).

Any help would be much appreciated.

Thanks,

Tom



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