Displaying 20 results from an estimated 4000 matches similar to: "false discovery rate !"
2006 Jun 09
4
HTML nsmall vector format problem
Hello All
I am having a bit of trouble formatting my HTML with the desired number
of digits after the decimal place. Am I doing something
wrong/misunderstanding or is it a bug?
Looking at the example supplied with ?HTML.data.frame:
HTML(iris[1:2,1:2],nsmall=c(3,1),file="")
Gives html output that includes the lines:
</tr> <tr><td
2007 Nov 16
7
sorting factor levels by data frequency of levels
using an example from r online help
> state <- c("tas", "sa", "qld", "nsw", "nsw", "nt", "wa", "wa",
"qld", "vic", "nsw", "vic", "qld", "qld", "sa", "tas",
"sa", "nt", "wa", "vic",
2006 Sep 26
2
Vectorise a for loop?
Hi R guru coders
I wrote a bit of code to add a new column onto a "topTable" dataframe.
That is a list of genes processed using the limma package. I used a for
loop but I kept feeling there was a better way using a more vector
oriented approach. I looked at several commands such as "apply", "by"
etc but could not find a good way to do it. I have this feeling there
2006 Nov 20
3
problem with loop to put data into array with missing data forsome files
Hi Jenny
If you want a general solution I understand.
However I just downloaded the file fine (as far as I can tell) so you
are welcome to have a copy. I can email it to you if you want.
I do not think your test for NA is valid. i.e
if(test != "NA"){
}
I think you should use
if(is.na(test)){
}
Or something similar.
J
---
John Seers
Institute of Food Research
Norwich
2008 Jul 15
2
Problem installing R on openSUSE 10.3
Dear All,
I am trying to install R 2.7 on my openSUSE 10.3. I have faithfully followed instruction at http://cran.r-project.org/bin/linux/suse/ReadMe.txt. I have downloaded all the RPMs but still R complains about:
libtcl8.4.so is needed by R-base-2.7.1-6.1.i586
I searched for this library and found a one, tcl-8.4.15-22.i586.rpm at openSUSE distribution site and installed. But R still complains
2008 Feb 01
6
Accessing the elements of a list
Hi R,
I wanted to know how do we access the elements of a list. In particular,
v=list(c(1,2,3,4,5),c(1,2,33,4,5),c(1,2,333,4,5),c(1,2,3333,4,5))
I want to access all the thirds items of the elements of the list. i.e.,
I want to access the elements, 3,33,333,3333. This can be done through
sapply as:
sapply(v,function(x) x[3])
But I need to access this without using
2009 Sep 11
3
Working with large matrix
Dear All,
I have large matrix (46000 x 11250). I would like to do the linear regression for each row. I wrote a simple function that has lm() and used apply(mat,1,func). The issue is that it takes ages to load the file and also to finish the lm. I am using LINUX 64 bit with 32G mem. Is there an elegant and fast way of completing this task?
Thanks in advance.
Kind regards,
Ezhil
2007 Apr 27
2
Scatter Plot in R - Help
Dear All,
I am using the following commands to do the scatter
plot of two vectors, say X and Y.
plot(X,Y, col="blue")
abline(a=1,b=1, col="red")
abline(a=-1,b=1, col="green")
I would like to split the scatter plot into 3 part
with 3 different colors: (i) points lies between 2
lines, (ii) points above line 1, and (iii) points
below line 2. I am struggling to do
2006 Apr 20
2
R-Help
Dear r-users,
Suppose I have three datasets:
Dataset-1:
Date x y
Jan-1,2005 120 230
Jan-2,2005 123 -125
Jan-3,2005 -110 300
Jan-4,2005 114 -21
Jan-7,2005 11 299
Mar-5,2005 200 311
Dataset-2:
Date x y
Jan-2,2005 123 -125
Jan-3,2005 -110 300
Jan-4,2005 114 -21
2005 Oct 26
3
Storing graphics output in PNG format.
Dear All,
How can I store hist() or any plot output graphics in
PNG format? I tried with bitmap() but not getting the
result. Appreciate your help on fixing this.
Thanks in Advance.
Regrads,
Ezhil
2008 Nov 21
2
Extracting diagonal matrix
Dear All,
I have a correlation matrix of size 100 x 100 and would like to extract the diagonal matrix from it. I have used the for loop to store tha correlation values of the diagonal matrix. Is there a 'R way' of doing this?
Thanks in advance.
Kind regards,
Ezhil
2009 Jan 19
2
How to assign names in a list
Hi All
How can you associate names with a list when names have not been
assigned? For example if you have a list like this:
list2<-list(1,2,3)
list2
[[1]]
[1] 1
[[2]]
[1] 2
[[3]]
[1] 3
How do you make it look like this with names? :
f1<-1
f2<-2
f3<-3
list1<-list(name1=f1, name2=f2, name3=f3)
list1
$name1
[1] 1
$name2
[1] 2
$name3
[1] 3
Thanks for any help.
I expect
2008 Nov 21
2
Calculating correlation for a big matrix
Dear All,
I have a matrix of size 10000 x 50. I would like to calculate all possible pair-wise correlation coefficient (5x10^7 combinations) using cor(). How can I efficiently calcualte and save the result in a matrix?
Thanks in advance.
Kind regards,
Ezhil
2009 Sep 07
2
Averaging rows if a condition is true.
Dear All,
I have matrix (50000 X 60) of subjects and their responses to a set of questions. All responses are classified into categories (500). I would like to average all subject's responses for each category. I wrote a code using a for loop but is not working. Could please tell me what's wrong with the code? I guess, there is a elegant R way of doing the same thing.
Thanks in advance.
2006 Nov 09
2
Closing R fails
Hello All
I cannot close R easily:
>
> q()
Error in .Last() : could not find function "finalizeSession"
>
This seems to have started after I used the R.utils package. If I load
the R.utils package I can close R successfully. But I do not want to
have to do this every time I run R.
Is there any way I can switch off /reverse this behaviour? (I have had a
look in the
2006 Jun 27
1
Boxplot questions.
Dear all,
I am having a data for 2 different treatments with
different time points. So, I used the following code
to plot the boxplot and also to do anova.
T11 <- c(280, 336, 249, 277, 429)
T12 <- c(400, 397, 285, 407, 313)
T13 <- c(725, 373, 364, 706, 249)
T21 <- c(589, 257, 466, 248, 913)
T22 <- c(519, 424, 512, 298, 907)
T23 <- c(529, 479, 634, 354, 1015)
obs <- c(T11,
2007 Mar 28
5
Large matrix into a vector
Hi,
I have a matrix HR(9x27). I would like to make a
single vector with elements: t(HR[,1]) followed by
t(HR[,2]) and then t(HR[,3] ... etc. Is there any neat
way of converting this matrix into a vector rather
doing something like c(t(HR[,1]), t(HR[,2]), t(HR[,3])
..)?
Thanks in Advance.
Kind regards,
Ezhil
____________________________________________________________________________________
2012 Mar 08
4
Correlation between 2 matrices but with subset of variables
Dear All,
I have two matrices A (40 x 732) and B (40 x 1230) and would like to calculate correlation between them. I can use: cor(A,B, method="pearson") to calculate correlation between all possible pairs. But the issue is that there is one-many specific mappings between A and B and I just need to calculate correlations for those pairs (not all). Some variables in A (proteins, say p1)
2006 May 29
2
newbie question: ROW average
Dimitris Rizopoulos wrote:
> look at ?rowMeans; you can also use "apply(mat, 1, mean)" but
> rowMeans() is better.
By my reading of the question, this is not what
Ezhil wants. He said:
``I have a 992 x 74 matrix. I would like to form a new matrix
by averaging each 4 rows from the original one.''
I.e. he wants (I think) the first row of the new matrix
to be the
2007 Jul 04
2
Loop and cbind
Hi, I would like to apply the following function for i between 1 and 12, and
then construct a list of the return series.
for (i in 1:12){
ewma[i] <- emaTA(calm[[i]]^2,0.03)
standard[i]<- calm[[i]]/sqrt(ewma[i])
standard <- cbind(standard[i])
}
But it does not work. Could anyone give me some advice how can I achieve
this? Many thanks
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