Displaying 20 results from an estimated 3000 matches similar to: "Help with unlist"
2010 Feb 26
3
Preserving lists in a function
Dear R users,
A co-worker and I are writing a function to facilitate graph plotting in R. The function makes use of a lot of lists in its defaults.
However, we discovered that R does not necessarily preserve the defaults if we were to input them in the form of list() when initializing the function. For example, if you feed the function codes below into R:
myfunction=function(
list1=list
2012 Nov 20
1
tcl/tk problem with tklistbox,the " " character and Rcmdr.
I everyone,
i have a little problem with tklistbox,the " " character and Rcmdr.
Please look at this code
require(tcltk)
tt<-tktoplevel()
levels.list2 <-tklistbox(tt,selectmode="multiple",exportselection="FALSE",
height=4, yscrollcommand=function(...)tkset(levels.list2.scroll,...))
2006 Feb 03
9
Because I''m very slow - trying to use console
I can''t see how to use variables so I am using console to test things
out...
clients table - a column named first_name
My very brief console session...
>> clients = Client.find_by_sql("select * from clients where first_name
= FN")
ActiveRecord::StatementInvalid: RuntimeError: ERROR C42703 Mcolumn
"fn" does not exist Fparse_expr.c L1034
2009 Apr 15
6
Intersection of two sets of intervals
Hi,
Algorithm question: I have two sets of "intervals", where an interval is
an ordered pair [a,b] of two numbers. Is there an efficient way in R to
generate the intersection of two lists of same?
For concreteness: I'm representing a set of intervals with a data.frame:
> list1 = as.data.frame(list(open=c(1,5), close=c(2,10)))
> list1
open close
1 1 2
2 5
2011 Jan 08
3
Question on list objects
Hi, I have 2 questions on list object:
1. Suppose I have a matrix like:
dat <- matrix(1:9,3)
Now I want to replicate this entire matrix 3 times and put entire result in a list object. Means, if "res" is the resulting list then I should have:
res[[1]]=dat, res[[2]]=dat, res[[3]]=dat
How can I do that in the easilest manner?
2. Suppose I have 2 list objects:
list1 <- list2
2012 Jul 05
2
vector entry in matix
hi,
i'm trying to figure out if there's any possibility to write a whole vector
into a matrix or data.frame or something like that. i don't mean
transormation. Here an example:
[,1] [,2]
[1,] "a" "d"
[2,] "b" "e"
[3,] "c" "f"
where e.g. a is a<-c(0,1) vector of length 2, b a vector of length 4,... (i
know that
2011 May 05
1
lapply, if statement and concatenating to a list
Hi R users
I was wondering on how to use lapply & co when the applied function has a conditional statement and the output is a 'growing' object.
See example below:
list1 <- list('A','B','C')
list2 <- c()
myfun <- function(x,list2)
{
one_elem <- x
cat('one_elem= ', one_elem, '\n')
random <- sample(1:2,1)
show(random)
2010 Mar 15
1
rbind, data.frame, classes
Hi,
This has bugged me for a bit. First question is how to keep classes with
rbind, and second question is how to properly return vecotrs instead of
lists after turning an rbind of lists into a data.frame
list1=list(a=2, b=as.Date("20090102", format="%Y%m%d"))
list2=list(a=2, b=as.Date("20090102", format="%Y%m%d"))
rbind(list1, list2) #this loses the
2007 Jan 28
2
Adding lines to xYplot
I am using xYplot to plot data and CIs. How do I add several lines to
the figure?
_____________________________
Professor Michael Kubovy
University of Virginia
Department of Psychology
USPS: P.O.Box 400400 Charlottesville, VA 22904-4400
Parcels: Room 102 Gilmer Hall
McCormick Road Charlottesville, VA 22903
Office: B011 +1-434-982-4729
Lab: B019
2008 Feb 10
2
grep etc.
Dear R-helpers,
How do I transform
v <- c('insd-otsd', 'sppr-unsp')
into
c('insd--otsd', 'sppr--unsp')
?
_____________________________
Professor Michael Kubovy
University of Virginia
Department of Psychology
USPS: P.O.Box 400400 Charlottesville, VA 22904-4400
Parcels: Room 102 Gilmer Hall
McCormick Road Charlottesville, VA 22903
2004 Oct 25
1
usage and behavior of 'setIs'
Hello,
am I using 'setIs' in the correct way in the subsequent (artifical) example?
Do I have to specify explicit 'setAs' for 'list' and 'vector' or
should this work automatically, since "getClass("List1")" states
an explicit coerce also for these classes.
I'm working with R 2.0.0 Patched (2004-10-06) on windows 2000.
Thanks for your
2012 Apr 19
1
question about lists
I am new to R, and I have been running into the following situation
when I mistype a variable name in some code:
> list1 <- list( a=1, b=2 )
> list2 <- list( a=1 )
> list2$b <- list1$c
> list2
$a
[1] 1
I would think at the point where I am trying to reference a field
called "c" -- that does not exist -- in list1, there would be an error
flagged.
Instead, list1$c
2007 Feb 11
2
Suppresing default text in pairs.lmList() in package = nlme
I would like to suppress the text 'Scatter Plot Matrix' that appears
under the plot. Could someone please suggest how?
_____________________________
Professor Michael Kubovy
University of Virginia
Department of Psychology
USPS: P.O.Box 400400 Charlottesville, VA 22904-4400
Parcels: Room 102 Gilmer Hall
McCormick Road Charlottesville, VA 22903
Office: B011
2011 Nov 21
1
Creating a list from all combinations of two lists
R-helpers:
Say I have two lists of arbitrary elements, e.g.:
list1=list(c(1:3),"R is fun!",c(3:6))
list2=list(c(10:5),c(5:3),c(13,5),"I am so confused")
I would like to produce a single new list that is composed of all
combinations of the "top level" of list1 and list2, e.g.:
listcombo=list(list(list1[[1]],list2[[1]]),list(list1[[1]],list2[[2]]
2011 Feb 06
1
Applying 'cbind/rbind' among different list object
Hi, I am wondering whether we can apply 'cbind/rbind' on many **equivalent**
list objects. For example please consider following:
> list1 <- list2 <- vector("list", length=2); names(list1) <- names(list2)
<- c("a", "b")
> list1[[1]] <- matrix(1:25, 5)
> list1[[2]] <- matrix(2:26, 5)
> list2[[1]] <- 10:14
> list2[[2]] <-
2004 Jun 23
5
assigning from multiple return values
I know that if I have a function that returns multiple values, I should
do return(list(foo, bar)). But what do I do on the recieving end?
fn <- function(x) {
return(list(foo, bar))
}
I know that at this point I could say
values.list <- fn(x)
and then access
values.list[1]
values.list[2]
But that's hideous. I'd rather be able to say something like
list(local_foo, local_bar)
2006 Feb 02
12
basic ''find'' question
I am struggling to understand the methodology here...
I have a find.rhtml
<%= start_form_tag :action => ''list2'', :first_name = client %>
<%# render :partial => ''form'' %>
<p><label for="client_first_name">First name</label><br/>
<%= text_field ''client'', ''first_name''
2008 Apr 17
2
Conditionally swap items in a data frame
df1 <- data.frame(a = LETTERS[1:2], b = LETTERS[3:4], c = 1:2)
I am looking for an idiom that swaps the elements of df$a and df$b
when (e.g.) df$c == 2, resulting in
df2 <- data.frame(a = LETTERS[c(1, 4)], b = LETTERS[c(3, 2)], c = 1:2)
_____________________________
Professor Michael Kubovy
University of Virginia
Department of Psychology
USPS: P.O.Box 400400 Charlottesville, VA
2007 Apr 10
2
Positioning in xyplot
Dear R-helpers,
I have an xyplot
of the following kind:
xYplot(y ~ x | p, groups = factor(gg, levels = c('1', '5', '2', '4',
'3')),
strip = strip.custom(var.name = 'g', factor.levels = c(1', '5', '2',
'4', '3'),
strip.levels = T, strip.names = T, sep = ' = ', shingle.intervals =
NULL),
data =
2006 Mar 06
1
JGR doesn't launch after updating to R 2.2.1
Dear r-helpers,
After updating to R version 2.2.1, 2005-12-20, powerpc-apple-
darwin7.9.0 (from binary), JGR wouldn't launch. I then deleted
everything I could find related to JGR, and reinstalled it from the
latest binary. Both R and JGR are installed in /Applications/
\~LocalApps/mathStat/.
Advice on how to identify the source of the problem?
My machine:
Machine Name: