From pauljohn32 at gmail.com  Fri Nov 11 16:25:02 2011
From: pauljohn32 at gmail.com (Paul Johnson)
Date: Fri, 11 Nov 2011 09:25:02 -0600
Subject: [Rd] One step way to create data frame with variable "variable
	names"?
Message-ID: <CAErODj9qO+8AruqRjdLTGcWaNgR8ptP3TUv-Y6hOv20r1eTtUg@mail.gmail.com>

Suppose

plotx <- "someName"
modx <- "otherName"
plotxRange <- c(10,20)
modxVals <- c(1,2,3)

It often happens I want to create a dataframe or object with plotx or
modx as the variable names.  But can't understand syntax to do that.

I can get this done in 2 steps, creating the data frame and then
assigning names, as in

newdf <- data.frame( c(1, 2, 3, 4), c(4, 4, 4, 4))
colnames(newdf) <- c(plotx, modx)

I was trying to hit this in one step, but can't find how.  If I could
get this in one step, it would simplify some book keeping, because
this current method requires me to build up the name vector to match
newdf, and sometimes I make mistakes.

After the data.frame already exists, I understand I can insert new
variables using the variable names with syntax like

newdf[[plotx]] <- c(23, 23, 23, 23)

PJ

-- 
Paul E. Johnson
Professor, Political Science
1541 Lilac Lane, Room 504
University of Kansas



[Rd] One step way to create data frame with variable "variable names"?
Paul Johnson