If you just want to plot the various combinations of a set of
variables/columns, you don't need a list, just another data frame/matrix with
the combinations of the column numbers you want to plot:
> df <- matrix(rnorm(100), 10, 10)
> df <- data.frame(df)
> comb <- expand.grid(7:10, 7:10)
> comb <- comb[comb[,1] < comb[,2],]
> rownames(comb) <- NULL
> comb
Var1 Var2
1 7 8
2 7 9
3 8 9
4 7 10
5 8 10
6 9 10
> windows(record=TRUE)
> apply(comb, 1, function(x) plot(df[,x[1]], df[,x[2]],
+ main=paste("Plot of", x[1], "with", x[2])))
NULL
-------------------------------------
David L Carlson
Department of Anthropology
Texas A&M University
College Station, TX 77840-4352
-----Original Message-----
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
Behalf Of Patricia Seo
Sent: Monday, October 13, 2014 6:28 PM
To: r-help@r-project.org
Subject: [R] Storing vectors as vectors in a list without losing each
individual vector
Hi everyone,
My help request is similar to what was asked by Ken Termiso on April 18th,
2005. Link here: https://stat.ethz.ch/pipermail/r-help/2005-April/069729.html
Matt Wiener answered with suggesting a vector list where you hand type each of
the vectors. This is not what I want to do. What I want to do is automate the
process. So, in other words creating a list through a loop.
For example:
My data frame is called "df" and I have four variables/vectors that are v7, v8,
v9, 10. Each variable/vector is an integer (no character strings). I want to
create a list called "Indexes" so that I can use this list for "for-in" loops
to SEPARATELY plot each and every variable/vector.
If I followed Matt Wiener's suggestion, I would input this:
Indexes = list()
Indexes[[1]] = df$v7
Indexes[[2]] = df$v8
Indexes[[3]] = df$v9
Indexes[[4]] = df$v10
But if I want to include more than four variable/vectors (let's say I want to
include 25 of them!), I do not want to have to type all of it. If I do the
following command:
Indexes <- c(df$v7, df$v8, df$v9, df$v10)
then I run into the same problem as Ken Termiso with having all the integers in
one vector. I need to keep the variables/vectors separate.
Is this just not possible in R? Any help would be great. Thank you!
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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.
