Displaying 20 results from an estimated 7000 matches similar to: "one function with 2 returnh points"
2012 May 05
3
alarm() doesn't beep
Dear all
I'd like to make a beeping sound in R, but alarm() doesn't beep? I
checked ?alarm but I couldn't find any pointers to system
configuration. Any ideas?
Regards
Liviu
> sessionInfo()
R version 2.14.2 (2012-02-29)
Platform: x86_64-pc-linux-gnu (64-bit)
locale:
[1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C
[3] LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8
[5]
2011 Mar 06
4
sorting & subsetting a data.frame
Dear all
This may be obvious, but I cannot get it working. I'm trying to subset
& sort a data frame in one go.
x <- iris
x$Species1 <- as.character(x$Species)
##subsetting alone works fine
with(x, x[Sepal.Length==6.7,])
##sorting alone works fine
with(x, x[order(Sepal.Length, rev(sort(Species1))),])
##gets subsetted, but not sorted as expected
with(x, x[(Sepal.Length==6.7) &
2013 Apr 15
6
how to transform string to "Camel Case"?
Dear all,
Given the following vector:
> (z <- c('R project', 'hello world', 'something Else'))
[1] "R project" "hello world" "something Else"
I know how to obtain all capitals or all lower case letters:
> tolower(z)
[1] "r project" "hello world" "something else"
> toupper(z)
[1] "R
2010 Nov 30
3
pca analysis: extract rotated scores?
Dear all
I'm unable to find an example of extracting the rotated scores of a
principal components analysis. I can do this easily for the un-rotated
version.
data(mtcars)
.PC <- princomp(~am+carb+cyl+disp+drat+gear+hp+mpg, cor=TRUE, data=mtcars)
unclass(loadings(.PC)) # component loadings
summary(.PC) # proportions of variance
mtcars$PC1 <- .PC$scores[,1] # extract un-rotated scores of
2011 Aug 10
3
convert 'list' to 'vector'?
Dear all
How does one convert a "non-symmetric" list to a vector? See below:
> x <- list()
> x[[1]] <- letters[1:5]
> x[[2]] <- letters[6:10]
> x[[3]] <- letters[11:12]
> x
[[1]]
[1] "a" "b" "c" "d" "e"
[[2]]
[1] "f" "g" "h" "i" "j"
[[3]]
[1] "k"
2010 Oct 22
3
R step-by-step execution
Hello!
I wouldl ike to ask you if R supports step by step execution. I have written
some nested loops and I would like to check on every step what are the values
of some variables. Printing all the variables just creates a really big output
of numbers.
Could you please give some debugging tutorial that included the aforementioned
functionalities?
|Moreover can you please tell me how I
2010 Nov 17
3
Variable Editor
Hello everoyne,
If you have ever used matlab you should know the variable editor. You click over the value of a variable in the workspace and it opens like a excel sheet. Do you know if there is something like that in R . This will make easier for me to understand what values are stored in a matrix.
Also I am using rkward. Do you know if there is anyway to see the already defined variables?
I
2010 Oct 23
1
command to start R and Rcmdr?
Dear all
I would like to start R with Rcmdr from the cli, without tweaking
Rprofile.site. This has been discussed in the past [1], but I don't
see a solution that (1) could be used with any working directory and
(2) would avoid starting Rcmdr on every R start-up.
Personally I tried the following, which starts R but not Rcmdr
liv at liv-laptop:~$ R --interactive -e 'require(Rcmdr)'
2010 Feb 03
4
Interactively editing point labels in a graph
Dear experts,
I would like to be able to interactively (if possible, with mouse and clik) edit point labels in graphs, particularly in multivariate graphs, such as the biplots you get after a correspondence analysis (with, for example, package ca), where labels tend to overlap. The graph aspect ratio is relevant (it needs to be mantained). And I'm working with Windows XP.
In this kind of
2012 Jun 21
4
convert 'character' vector containing mixed formats to 'Date'
Dear all
I have a 'character' vector containing mixed formats (thanks Excel!)
and I'd like to translate it into a default "%Y-%m-%d" Date vector.
x <- c("1/3/2005", "13/04/2004", "2/5/2005", "2/5/2005", "7/5/2007",
"22/04/2004", "21/04/2005", "20080430", "13/05/2003",
2011 Oct 12
4
R and Forex
Hi all,
I recently started learning about Forex and found this O'Reilly book in
Barnes & Nobles about R. I bought it out of pure curiosity. I like what I
see. However, I have a question. Has anyone tried to bring these two ideas
together in a financial and trading sense? Are there any libraries or
modules in R that can aid in this venture?
--Yves
[[alternative HTML version
2011 Apr 07
1
plyr workaround to converting by() to a data frame
Dear all
Is there a clean plyr version of the following by() and do.call(rbind,
...) construct:
> df<-data.frame(a=1:10,b=11:20,c=21:30,grp1=c("x","y"),grp2=c("x","y"),grp3=c("x","y"))
> dfsum<-by(df[c("a","b","c")], df[c("grp1","grp2","grp3")], range)
>
2012 Apr 10
1
plyr: set '.progress' argument to default to "text"
Dear all
Is it possible to set globally the option .progress = "text" to all
the apply functions in 'plyr'. For example, current default is
daply(..., .progress = "none"). I would like to set it to daply(...,
.progress = "text"), so as to avoid writing the argument every time I
call such a function. I looked into ?daply and ?create_progress_bar
without much
2011 Aug 19
1
Hmisc::rcorr on a 'data.frame'?
Dear all
?Hmisc::rcorr states that it takes as main argument "a numeric
matrix". But is it normal that it fails in such an ugly way on a data
frame? (See below.) If the function didn't attempt any conversion to a
matrix, I would have expected it to state that in the error message
that it didn't accept 'data.frame' objects in its input. Also, I
vaguely remember having used
2011 Oct 03
2
extracting p-values in scientific notation
Dear all
How does print.htest display the p-value in scientific notation?
> (x <- cor.test(iris[[1]], iris[[3]]))
Pearson's product-moment correlation
data: iris[[1]] and iris[[3]]
t = 21.65, df = 148, p-value < 2.2e-16
alternative hypothesis: true correlation is not equal to 0
95 percent confidence interval:
0.8270 0.9055
sample estimates:
cor
0.8718
Above the p-value comes
2011 Aug 10
2
round() a data frame containing 'character' variables?
Dear all
It is difficult to use round(..., digits=2) on a data frame since one
has to first take care to remove non-numeric variables such as
'character' or 'factor':
> head(round(iris, 2))
Error in Math.data.frame(list(Sepal.Length = c(5.1, 4.9, 4.7, 4.6, 5, :
non-numeric variable in data frame: Species
> head(round(iris[1:4], 2))
Sepal.Length Sepal.Width Petal.Length
2011 Nov 24
2
understanding all.equal() output: "Mean relative difference"
Dear all
How should one parse all.equal() output? I'm specifically referring to
the 'mean relative difference' messages. For example,
> all.equal(pi, 355/113)
[1] "Mean relative difference: 8.491368e-08"
But I'm not sure how to understand these messages. When they're close
to 0 (or 1xe-16), then it's intuitive. But when they're big,
> all.equal(1, 4)
2012 Aug 06
3
test if elements of a character vector contain letters
Dear all
I'm pretty sure that I'm approaching the problem in a wrong way.
Suppose the following character vector:
> (x[1:10] <- paste(x[1:10], sample(1:10, 10), sep=''))
[1] "a10" "b7" "c2" "d3" "e6" "f1" "g5" "h8" "i9" "j4"
> x
[1] "a10" "b7"
2012 Nov 25
2
RExcel, ROOo and LibreOffice inquiry
Dear all
I'd like to give RExcel a decent spin, mainly to take advantage of
Excel's data management facilities and automatic recalculations.
However I cannot use this Windows-only solution on the platform of my
choice, Linux.
Alternatively I've been considering the cross-platform ROOo, the
OpenOffice equivalent of RExcel, but in this case the problem is that
the only release available
2012 Jul 10
3
fill 0-row data.frame with 1 line of NAs
Dear all
Is there a simpler method to achieve the following: When I obtain an
empty data.frame after subsetting, I need for it to contain one line
of NAs. Here's a dummy example:
> (.xb <- iris[ iris$Species=='zz', ])
[1] Sepal.Length Sepal.Width Petal.Length Petal.Width Species
<0 rows> (or 0-length row.names)
> dim(.xb)
[1] 0 5
> (.xa <-