apply(iris[, -5], 2, tapply, iris$Species, mean)
On Wed, Jun 9, 2010 at 3:43 PM, SH.Chou cls3...@gmail.com wrote:
Hi there:
I have a question about generating mean value of a data.frame. Take
iris data for example, if I have a data.frame looking like the following:
-
On Mon, Jun 7, 2010 at 9:05 AM, sidahmed BENABDERRAHMANE
sidahmed.benabderrahm...@loria.fr wrote:
Dear all,
I have a problem when using some classification functions (Kmeans, PAM,
FANNY...) with a distance matrix, and i would to understand how it proceeds
for the positioning of centroids
On Fri, Jun 4, 2010 at 1:44 PM, Ben Bolker bol...@ufl.edu wrote:
Eduardo J. Chica ejchica at gmail.com writes:
Hi I am having problems with the rendering of scientific symbols (mu and
degree) in my plots. Whenever I use these symbols they are rendered
changed (mu is changed to the
This issue is already in the Notes section of ?pdf. It remains to be seen
if the OP's problem was this exact one, since they didn't specify an
example.
aahhh, thank you for pointing this out. I never noticed this note.
Peter
__
c(as.matrix(data)) will not do it?
Peter
On Fri, Jun 4, 2010 at 5:47 PM, Nick Matzke mat...@berkeley.edu wrote:
Hi,
This can't be hard, but I can't find the solution. I have a 380x380 data
frame of numbers. I would like to turn it into a single column so I can do
e.g. hist and mean on it
Well, your example matrix is symmetric, so row and column operations
naturally return the same values.
You may want to note though that if you apply your function to a matrix
along rows, the results will be stored in the __columns__ of the resulting
matrix. Thus, if you want to simply divide the
temp2 = tempr
temp2[temp20] = 0
HTH
On Fri, May 28, 2010 at 8:37 AM, ecvet...@uwaterloo.ca wrote:
I have a data frame with both positive and negative values, and I want to
make all the negative values equal zero, so i can eventually take an
average.
I've tried
temp2 - ifelse(tempr0, 0,
)
# still works, from original list construction
x[3]
# but this doesn't work
x[4]
Cheers!
Nick
Peter Langfelder wrote:
c concatenates all arguments. For example, c(c(0,1,2), c(3,4,5)) gives
a vector 0,1,2,3,4,5.
Another example:
c(list(a=c(0,1), b = c(2,3)), list(c = c(4,5), d = c
Should illicit a multi-CPU response with R/ATLAS? If so, any
suggestions on how to tweak my install to get it working? Thanks!
--j
On Wed, May 26, 2010 at 3:17 PM, Peter Langfelder
peter.langfel...@gmail.com wrote:
If you didn't specify an external BLAS when you ran R configure
script
On Thu, May 27, 2010 at 9:43 AM, William Dunlap wdun...@tibco.com wrote:
-Original Message-
Unlike with vectors, with lists you don't have to specify
length and can add
as many list components as you want later The length of the list will
automatically adjust.
'Nonrecursive'
If you didn't specify an external BLAS when you ran R configure
script, you are not using ATLAS. If you're not sure and you still have
the output of the configure script, at the end it'll say whether it
uses an external BLAS.
Alternatively, you may also want to generate two random 5000x5000
c concatenates all arguments. For example, c(c(0,1,2), c(3,4,5)) gives
a vector 0,1,2,3,4,5.
Another example:
c(list(a=c(0,1), b = c(2,3)), list(c = c(4,5), d = c(5,6)))
$a
[1] 0 1
$b
[1] 2 3
$c
[1] 4 5
$d
[1] 5 6
So instead of a list of two lists, you get a single list with 4 components.
Hi all,
apologies if this has been answered before, I didn't find the answer
in the archives. I am putting together a package that I would like to
have optional functionality if another package is installed. In
normal, non-package code, I would simply write something like
if (require(qvalue))
{
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