[Rd] One step way to create data frame with variable variable names?
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 __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] One step way to create data frame with variable variable names?
On Fri, Nov 11, 2011 at 10:25 AM, Paul Johnson pauljoh...@gmail.com wrote: 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) Try this: newdf - setNames(data.frame( c(1, 2, 3, 4), c(4, 4, 4, 4)), c(plotx, modx)) -- Statistics Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] One step way to create data frame with variable variable names?
plotx - someName modx - otherName data.frame( structure(list(c(1, 2, 3, 4)), names=plotx), structure(list(c(4, 4, 4, 4)), names=modx)) someName otherName 11 4 22 4 33 4 44 4 (I think this is more of an R-help question.) Bill Dunlap Spotfire, TIBCO Software wdunlap tibco.com -Original Message- From: r-devel-boun...@r-project.org [mailto:r-devel-boun...@r-project.org] On Behalf Of Paul Johnson Sent: Friday, November 11, 2011 7:25 AM To: R Devel List Subject: [Rd] One step way to create data frame with variable variable names? 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 __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
