Displaying 20 results from an estimated 2000 matches similar to: "R: rearranging data frame rows"
2006 Jun 23
1
rearranging data frame rows
Hi All,
I have two data frames. The first contains data about a number of individuals,
coded in the first column with a name, in an order I find convenient.
The second contains different data about the same indivduals, in a different
order. Both data frame have the individual names in the first column.
I need to reorder the second data frame so the rows are rearranged in the same
manner as
2008 Aug 27
2
r-base-core issue
Hi All,
I cannot upgrade r-base and r-recommended because the latest (latest as in it
was not listed as 'upgradable' yesterday but today is) r-base-cose is
2.7.1-2hardy0 not hardy1:
r-base:
Depends: r-base-core (>=2.7.2-1hardy1) but 2.7.1-2hardy0 is to be installed
Depends: r-recommended (=2.7.2-1hardy1) but 2.7.1-2hardy0 is to be installed
r-base-core:
r-recommended:
2007 Feb 19
1
memory management uestion
Hi All,
I would like to ask the following.
I have an array of data in an objetct, let's say X.
I need to use a for loop on the elements of one or more columns of X and I am
having a debate with a colleague about the best memory management.
I believe that if I do:
col1 = X[,1]
col2 = X[,2]
...
colx = X[,x]
and then
for(i in whatever){
do something using col1[i], col2[i] ... colx[i]
}
2006 Oct 30
1
memory management
Hi All,
just a quick (?) question while I wait my code runs...
I'm comparing the identity of the lines of a dataframe, doing all possible
pairwise comparisons. In doing so I use identical(), but that's by the way. I'm
doing a (not so) quick and dirty check, and subsetting the data as
data[row.numb,]
and
data[a different row,]
I suspect the problem there is that I load into
2007 Aug 28
3
data formatting: from rows to columns
Hi All,
I have some data I need to write as a file from R to use in a different program.
My data comes as a numeric matrix of n rows and 2 colums, I need to transform
each row as a two rows 1 col output, and separate the output of each row with a
blanck line.
Foe instance I need to go from this:
V2 V3
27 2032567 19
28 2035482 19
126 2472826 19
132 2473320 19
136 2035480 135
2007 Feb 14
1
problems apt-getting from CRAN
Hi there,
I hope that's not been asked ad nauseam (but I could not find it in the
archives...) but, if I put a CRAN mirror in my sources.list and I try to install
the latest R version for 'testing' I get the warning that the packages cannot be
autenticated.
I tried to figure out how to get a GPG key from the mirror I'm using (the
austrian one) in case that's the solution,
2007 Jun 20
1
non permanent change of vector values
Hi All,
I have the following problem: I have a vector
x = rep(0,15)
x[1:2] = 1
x
[1] 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0
I need to be able to call that vector 'x' so that if condition 'A' is true, only
the first value is kept 'as is' and all the others are put to 0
if(A == T)
function(x) with x returning 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0
and if 'A' is false the
2006 Oct 13
1
cannot load MASS in Etch
Hi All,
I hate to do this (because I always found the R/Debian combo exceptional and I
never had the time to ontribute --sorry about that--), BUT, the latest r-cran-vr
for Etch (testing) is
dpkg -l | grep r-cran-vr
ii r-cran-vr 7.2.29-1 GNU R package
accompanying the Venables and Ripley book on S
and I get the following error if I try to load MASS
2006 Sep 26
5
putting stuff into bins...
Hi All,
I have a vector of data, a vector of bin breakpoints and I want to put my data
in the bins and then extract fanciful informations like the mean value of each bin.
I know I can write my own function, but I would have thought that R should have
somewhere a function that took as arguments something like (data, breaks, what
to do with the data in the bins). I surey could not find it
2005 Apr 18
1
Rd.sty problems.
Hi All,
I am trying to build a new R package to submit, but it's failing to
create a tex manual:
R CMD check Biodem
* checking for working latex ... OK
* using log directory
'/home/greatsage/Fede/R-packages/temp/Biodem.Rcheck'
* checking for file 'Biodem/DESCRIPTION' ... OK
* checking if this is a source package ... OK
* Installing *source* package 'Biodem' ...
** R
2008 Feb 18
2
predicting memory usage
Hi All,
is there a way of predicting memory usage?
I need to build an array of 86000 by 2500 numbers (or I might create
a list of 2 by 2500 arrays 43000 long). How much memory should I
expect to use/need?
Cheers,
Fede
--
Federico C. F. Calboli
Department of Epidemiology and Public Health
Imperial College, St. Mary's Campus
Norfolk Place, London W2 1PG
Tel +44 (0)20 75941602 Fax +44
2007 Feb 07
1
spss file import
Hi All,
does anyone ever import old SPSS files in a sl3 format?
read.spss('file.sl3') does not seem to work... it's not recognised as
a supported SPSS format at all.
Best,
Fede
--
Federico C. F. Calboli
Department of Epidemiology and Public Health
Imperial College, St. Mary's Campus
Norfolk Place, London W2 1PG
Tel +44 (0)20 75941602 Fax +44 (0)20 75943193
f.calboli
2007 Mar 23
1
plotting symbol
Hi All,
can I have a plot where the symbol for the dots is smaller than pch
=20 but bigger than pch = '.'?
Best,
Fede
--
Federico C. F. Calboli
Department of Epidemiology and Public Health
Imperial College, St. Mary's Campus
Norfolk Place, London W2 1PG
Tel +44 (0)20 75941602 Fax +44 (0)20 75943193
f.calboli [.a.t] imperial.ac.uk
f.calboli [.a.t] gmail.com
2009 Nov 05
1
karmic cran2deb
Hi All,
just to check, is cran2deb available for Karmic Koala (ideally also
for a amd_64)?
Cheers,
Fede
--
Federico C. F. Calboli
Department of Epidemiology and Public Health
Imperial College, St. Mary's Campus
Norfolk Place, London W2 1PG
Tel +44 (0)20 75941602 Fax +44 (0)20 75943193
f.calboli [.a.t] imperial.ac.uk
f.calboli [.a.t] gmail.com
2006 Mar 28
2
as.matrix and one row
Hi All,
I have the following problem:
x = c(1,2)
x
[1] 1 2
as.matrix(x)
[,1]
[1,] 1
[2,] 2
BUT, if I add:
y = c(3,4)
as.matrix(rbind(x,y))
[,1] [,2]
x 1 2
y 3 4
It does not transpose. Since I will need as.matrix() for a list of data
that is in one or more lines, I need as.matrix to behave in a consisten
fashions, so I get
as.matrix(x, whatever)
[,1] [,2]
x 1
2006 Mar 08
3
'less' for R?
Hi All,
is there an equivalent of the Unix command 'less' (or 'more'), so I can
look at what's inside a data.frame or a matrix without having it printed
out on console?
I am using R on Debian Linux and Mac OS 10.4.5
Cheers,
F
--
Federico C. F. Calboli
Department of Epidemiology and Public Health
Imperial College, St Mary's Campus
Norfolk Place, London W2 1PG
Tel +44
2006 Mar 12
1
finding warning point in function
Hi everyone,
I would like to find out when and where exactly I get the following
warning in a piece of code I've written:
Error in "[<-"(`*tmp*`, iseq, value = numeric(0)) :
nothing to replace with
The code is a for () loop performing a somewhat trivial calculation,
modulated by a number of logical if(){} else(){} conditions, involving
the creation of a number of
2006 Feb 28
4
subsetting a list of matrices
Hi All,
I have a list of matrices:
> x
[,1] [,2]
[1,] 1 4
[2,] 2 5
[3,] 3 6
> y
[,1] [,2] [,3] [,4] [,5] [,6]
[1,] 18 21 24 27 30 33
[2,] 19 22 25 28 31 34
[3,] 20 23 26 29 32 35
> z =list(x,y)
I want to create a second list that is has a subset each matrix in the
list subsetting so I get the 2nd and 3rd row of each (and
2006 Apr 21
2
forcing apply() to return data frame
Hi All,
I am (almost) successfully using apply() to apply a function recursively
on a data matrix. The function is question is as.genotype() from the
library 'genetics'
apply(subset(chr1, names$breed == 'lab'),2,as.genotype,sep ="")
Unfortuantely apply puts it's results into a matrix object rather than a
data frame, tranforming my factors into numerics and
2007 Jun 25
3
fractional calculations
Hi All,
is there a function in R that allows me to work with fractions without
transforming them to floats (or whatever) in between?
Something that would calculate something like:
(1/2 + 1/8) * 1/2 = 5/16
without ever transforming to 0.5 and 0.125?
Best,
Federico
--
Federico C. F. Calboli
Department of Epidemiology and Public Health
Imperial College, St Mary's Campus
Norfolk Place,