Re: [R] How to format R code in LaTex documents

2007-01-15 Thread Neil McLeod
Another alternative is to simply use LyX (www.lyx.org), which is a WYSIWYG
(graphical) front-end for LaTeX. There's an code environment where you can
paste everything right in, and it'll show in your PDF output exactly as it
appears while editing.

Also, not an answer to your question, but you might also want to check out
xtable (http://cran.r-project.org/src/contrib/Descriptions/xtable.html),
which allows R to output LaTeX that can be pasted into your .tex file.

On 1/15/07, Tim Calkins [EMAIL PROTECTED] wrote:

 Consider using the fancyvrb package if you need additional customization.

 On 1/16/07, Benjamin Dickgiesser [EMAIL PROTECTED] wrote:
  Hi,
 
  I am planning on putting some R script in an appendix of a LaTex
  document. Can anyone recommend me a way of how to format it? Is there
  a way to keep all line breaks without having to insert \\ in every
  single line?
 
  Thank you!
  Benjamin
 
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[R] Filtering a data frame by regular expression

2006-12-09 Thread Neil McLeod
Hello,

I am having difficulty filtering a data frame.

I would like to take all the rows of a data frame where column A contains
the regular expression UTI (or some other regex). Here's what I've got:

utiRE - function (avector) {
occurs - c()
r1 - UTI
for (x in avector) {
if (!is.na(grep(r1,x,perl=TRUE))) {
occurs - c(occurs, TRUE)
} else {
occurs - c(occurs, FALSE)
}


I know this is a clunky way of doing it, but I tried more natural ways first
(i.e. without iteration), to no avail. I think the problem is that when I
iterate through the list, the strings in avector get turned into numbers.

Any solutions?

Thanks!
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Re: [R] Filtering a data frame by regular expression

2006-12-09 Thread Neil McLeod
Thank you so much! It looks like as.character was the missing ingredient.
Neil

On 12/9/06, Chuck Cleland [EMAIL PROTECTED] wrote:

 Neil McLeod wrote:
  Hello,
 
  I am having difficulty filtering a data frame.
 
  I would like to take all the rows of a data frame where column A
 contains
  the regular expression UTI (or some other regex). Here's what I've
 got:
 
  utiRE - function (avector) {
  occurs - c()
  r1 - UTI
  for (x in avector) {
  if (!is.na(grep(r1,x,perl=TRUE))) {
  occurs - c(occurs, TRUE)
  } else {
  occurs - c(occurs, FALSE)
  }
 
 
  I know this is a clunky way of doing it, but I tried more natural ways
 first
  (i.e. without iteration), to no avail. I think the problem is that when
 I
  iterate through the list, the strings in avector get turned into
 numbers.
 
  Any solutions?

   The following approach works for me:

 iris[grep(a$, iris$Species),]

 iris[grep(^v, as.character(iris$Species)),]

  Thanks!

 --
 Chuck Cleland, Ph.D.
 NDRI, Inc.
 71 West 23rd Street, 8th floor
 New York, NY 10010
 tel: (212) 845-4495 (Tu, Th)
 tel: (732) 512-0171 (M, W, F)
 fax: (917) 438-0894




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[R] How to access a column by its label?

2006-08-03 Thread Neil McLeod
Hi all,

Is there any way to access a column of a data frame by its label (title)
rather than its column index? For example, I'd like to be able to select
animals[,weight] rather than animals[,3], if the third column of the
animals data frame has the label weight.

Thank you!

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