Displaying 20 results from an estimated 3000 matches similar to: "plyr: set '.progress' argument to default to "text""
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 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) &
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)'
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"
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
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
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
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
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 <-
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
2009 Aug 20
4
expanding 1:12 months to Jan:Dec
Dear R users
I would like to do some spreadsheet style expansion of dates. For
example, I would need to obtain a vector of months. I approached in an
obviously wrong way:
> paste(01:12)
[1] "1" "2" "3" "4" "5" "6" "7" "8" "9" "10" "11" "12"
> as.Date(paste(01:12),
2010 Oct 09
4
same random numbers in different sessions
Dear all
I'm using Xubuntu Lucid and I keep getting the same random numbers
whenever I start a new session of R. For example, I keep getting
> sample(1:1000, 1)
[1] 87
or
> rnorm(1:10)
[1] -1.3618103 0.4241701 1.0720076 0.2208145 -0.5375314 -0.4846588
[7] 0.7576768 0.6527407 -0.6868786 0.8718527
I expected that some set.seed() instruction woudl be present in a
config file in
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",
2009 Oct 14
3
currency conversion function?
Dear all
Is there any R function that would perform currency conversion using
up-to-date exchange rates? I would be looking for a function that
allows to download recent exchange rates (say, from Yahoo!) and then
use these in converting currencies (say, USD to EUR).
I am not sure whether r-sig-finance would be more appropriate, but the
(off-)topic feels general enough to me. Thank you
Liviu
--
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
2009 Oct 17
1
Easy way to `iris[,-"Petal.Length"]' subsetting?
Dear all
What is the easy way to drop a variable by using its name (and not its
number)? Example:
> data(iris)
> head(iris)
Sepal.Length Sepal.Width Petal.Length Petal.Width Species
1 5.1 3.5 1.4 0.2 setosa
2 4.9 3.0 1.4 0.2 setosa
3 4.7 3.2 1.3 0.2 setosa
4 4.6 3.1
2009 Aug 04
2
100% CPU when running (cran2deb) JGR on Debian
Dear all,
I installed the amd64 cran2deb [1] JGR binaries on a fresh Debian
testing, and JGR is missbehaving. When JGR starts up, one core of the
CPU goes to 100% and stays there, even though I am keeping it idle and
not performing any operation.
I tried JGR with both sun-java6-jdk and openjdk-6-jdk,
debian-liv:/home/liviu# update-alternatives --config java
There are 4 choices for the alternative
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)
2011 Aug 19
2
display only the top-right half of a correlation matrix?
Dear all
Is there an easy way to display only one half (top-right or
bottom-left) of a correlation matrix?
> require(Hmisc)
> rcorr(as.matrix(mtcars[ , 1:4]))
mpg cyl disp hp
mpg 1.00 -0.85 -0.85 -0.78
cyl -0.85 1.00 0.90 0.83
disp -0.85 0.90 1.00 0.79
hp -0.78 0.83 0.79 1.00
n= 32
P
mpg cyl disp hp
mpg 0 0 0
cyl 0 0 0
disp 0 0