Displaying 20 results from an estimated 700 matches similar to: "help on Venn's diagram"
2010 Feb 12
5
logical operations with lists
Sorry, maybe it's easy but I haven't found anything useful:
how can I obtain a list C that contains all the members in the list B that are not in list A? This are lists of nanes, not numbers!
Thank you
Gabriele Zoppoli, MD
Ph.D. Fellow, Experimental and Clinical Oncology and Hematology, University of Genova, Genova, Italy
Guest Researcher, LMP, NCI, NIH, Bethesda MD
Work: 301-451-8575
2010 Apr 22
6
simple question
Hi
how can I find, in a vector of characters, which is the most frequent one?
Thanks
Gabriele Zoppoli, MD
Ph.D. Fellow, Experimental and Clinical Oncology and Hematology, University of Genova, Genova, Italy
Guest Researcher, LMP, NCI, NIH, Bethesda MD
Work: 301-451-8575
Mobile: 301-204-5642
Email: zoppolig at mail.nih.gov
2010 Sep 03
6
how can I plot bar plots with all the bars (negative and positive) in the same direction????
Dear r-help mailing list,
this seems stupid, but I actually don't find the solution:
if I have a vector of numbers x of length n, ranging, say, from -3 to 4, if I do
barplot (x)
all the values below 0 go downwards, and all the positive values go upward. How can I make them all begin from the minimum pointing upwards?
Thanks!
Gabriele Zoppoli, MD
Ph.D. Fellow, Experimental and Clinical
2010 May 28
3
how to create automatically names for vectors in a loop?
Hi,
I want to generate a number of vectors and store them with different names, like this:
x=1
while (x<100)
{
vector#x# = rnorm(100)
x=x+1
}
where each vector has, at its hand, instead of #x# a number which goes from 1 to 99.
How can I do this?
Thanks
Gabriele Zoppoli, MD
Ph.D. Fellow, Experimental and Clinical Oncology and Hematology, University of Genova, Genova, Italy
Guest
2010 Jan 29
2
question about transpose
Hi all,
if I transpose a matrix with t(data), the newly created colums do not appear to have the first row as header. How can I do to have all the newly created columns have their first row as a header?
Thanks
Gabriele Zoppoli, MD
Ph.D. Fellow, Experimental and Clinical Oncology and Hematology, University of Genova, Genova, Italy
Guest Researcher, LMP, NCI, NIH, Bethesda MD
Work: 301-451-8575
2010 Feb 13
3
how to do calculations in data matrices?
Please give me just a reference where I can find something useful.
In summary, I need to :
- find the median of each row of a matrix
- create a new matrix with each value in the first matrix divided by the median of its row
- if a value "a" in the second matrix is < 1, I need to substitute it with 1/a
I know that for some of you it must be overeasy, but I swear I googled for two
2010 Jan 29
1
how to create a histogram from a matrix?
Hi,
I'm trying to create a frequency histogram for all the values in a table, but when I try to do so, an error is returned, saying that I cannot create a histogram with an obkect of that class. Here's what I do:
>library(lattice)
>table<-read.table("C:/.../table",header=TRUE,sep="\t")
>histogram(table)
Please help me!!!
Thanks
Gabriele Zoppoli, MD
2010 Jan 31
1
permutation analysis with randomly chosen subsets of a matrix
Hello,
here is the problem:
I want to demonstrate that, on average, the Pearson's correlations of a specified subset of genes from a huge list (>18,000 columns) are higher than any randomly chosen subset of that list. I would therefore like to do a number of tests between that specified subset and randomly chosen ones from the "mother" list.
How could I do that? What would be
2010 May 08
1
memory limit
Hi,
when I try to import a microarray CEL batch, I get this error message:
> myAB <- ReadAffy ()
Error in .Call("read_abatch", filenames, rm.mask, rm.outliers, rm.extra, :
cannot allocate vector of length 1287151200
which, assuming the value is in bites, is below my RAM values (3 Gb recognized by Windows).
The isse is, when I try to do
memory.limit (size = 3000 )
the
2010 May 23
3
"order" issue
Hi everybody, this is a real dummy thing.
I sorted a matrix based on a given column, and what I get is right, until it comes to columns of negative and positive values; than, "order" orders everything from max to min in the negative values, and then AGAIN from max to min in the positive values!!!
Why isn't everything order from max to min, and that's it?
Thank you!!!
Attached
2010 Feb 27
1
help with Gantt chart
Hi,
I don't know to solve this error that is returned, even though I understand it:
library(plotrix)
Ymd.format<-"%Y/%m/%d"
gantt.info<-list(labels=
c("First task","Second task (1st part)","Third task (1st part)","Second task (2nd part)","Third task (2nd part)",
"Fourt task","Fifth task","Sixth
2010 Jan 29
1
help on drawing right colors within a grouped xyplot (Lattice)
Hi,
I've lost my mind on it... I have to scatterplot two vectors, grouped by a third variable, with two different dimensions according to whether each cell line in the plot is sensitive or resistant to a given drug, and with a different color for each of 9 tissues of origin.
Here's what I've done:
2010 Apr 22
1
cell-based high-throughput chemical compound screens package?
Hi
I'm looking for a package to perform quality control, normalization and analysis of high throughput cell-base chemical screens. I know that the cellHTS2 package provides this for siRNA screens.
Does anybody know if something like what I'm looking for exists?
Thank you!
Gabriele Zoppoli, MD
Ph.D. Fellow, Experimental and Clinical Oncology and Hematology, University of Genova,
2006 Jun 26
3
How can I install Puppy Linux as guest
I need to install Puppy linux as a guest.
Usually I boot from the Puppy CD and have so a life system which I can
than install to hard disk.
How do I do that as a Xen guest?
bye
Ronald
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2010 Apr 07
0
exporting rotating plot into Powepoint
Hi,
I need to export a rotating plot like the one generated from the following function into a PPT slide or something that can be viewed by reviewers of a journal:
library(np)
library(datasets)
data(faithful)
f <- npudens(~eruptions+waiting,data=faithful)
plot(f,view="rotate",neval=100,phi=30,main="",xtrim=-0.2)
Thanks!
Gabriele Zoppoli, MD
Ph.D. Fellow,
2011 Mar 06
1
read.table mystery
Hello,
Please have a look at the code below, which I use to read in the attached
file. As line 18 of the file reads "1065:>sp|Q9V3T9|ADRO_DROME
NADPH:adrenodoxin oxidoreductase, mitochondrial OS=Drosophila melanogaster
GN=dare PE=2 SV=1", I expect the code below to produce a 3 column data frame
with most of the last column empty and line 18 to produce a data.frame row
like so:
2007 Aug 23
6
mongrel + pound + ziya problems
Hi,
i''m using to ziya to display some graph.
If i use it running mongrel as single instance all work good (very slow
but work).
If i try to use it with pound as htto proxy ziya charts wait forever for
data...that never arrive.
If i check the mongrel log it seemes to make queries on the database and
retrieve data,but nothin appera.
Anyone have an idea on how i can solve this problem?
2012 Jun 14
1
Can someone recommend a package for SNP cluster analysis of Fluidigm microarrays?
I know that there are quite a few packages out that there for cluster
analysis. The problem that I am facing is finding a package that will not
incorporate all my samples into clusters but just the samples that fit a
threshold (that I have not set yet and may need help finding the right
level) for genotyping. It should be able to "no call" samples outside the
clusters. It also needs to
2003 Sep 05
20
[Bug 635] openssh-SNAP-20030903: configure does not work well with heimdal(krb5)
http://bugzilla.mindrot.org/show_bug.cgi?id=635
Summary: openssh-SNAP-20030903: configure does not work well with
heimdal(krb5)
Product: Portable OpenSSH
Version: -current
Platform: All
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Kerberos support
2006 Apr 26
8
Xen 3.0 on FC4 - guest domains cant ping host domain
I am installed Xen 3.0 on a Fedora Core 4(2.6.12-1.1454_FC4xen0) machine.
This machine is currently running one host domain:
[root@]# xm list
Name Id Mem(MB) CPU VCPU(s) State Time(s)
Domain-0 0 128 0 1 r---- 49.1
fc4-vm1 1 63 0 1 -b--- 18.5
Following is the network configuration for Domain-0:
eth0 Link