Displaying 20 results from an estimated 1000 matches similar to: "Question in Using sink function"
2003 Aug 06
3
How to copy and paste a R plot onto Word (or Power Point)
All,
Anybody can tell how to export a R plot onto Word (or Power Point)?
Many thanks in advance.
-MY
2008 Feb 14
1
How to check cy5 and cy3 values were lowess normalized
Hi,
I have some microarray data, cy5 and cy3 values are in log2. Is there a
way to check they have undergone lowess normalization ?
Thanks
Stanley
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2009 May 06
1
'RG' looks like a pre-2.4.0 S4 object: please recreate it
I would like to load ApoAI.RData. During the operation of reading this
data an error occurs. There is also a problem with STF file.
> library (limma)
> load("ApoAI.RData")
Warning message:
'RG' looks like a pre-2.4.0 S4 object: please recreate it
> objects()
[1] "RG"
> names(RG)
[1] "R" "G" "Rb"
2007 Dec 06
1
finding most highly transcribed genes - ranking, sorting and subsets?
Hello,
I am not only interested in finding out which genes are the most highly up-
or down-regulated (which I have done using the linear models and Bayesian
statistics in Limma), but I also want to know which genes are consistently
highly transcribed (ie. they have a high intensity in the channel of
interest eg. Cy5 or Cy3 across the set of experiments). I might have missed
a straight forward
2004 Apr 29
5
Problems in plot
Hello,
I have R1.9.0 under Windows XP. My program plots several plots using
x11()
par(cex = 0.75)
......
x11()
par(cex = 0.75)
......
x11()
par(cex = 0.75)
......
x11()
par(cex = 0.75)
......
Sometimes, one of them generates a small frame only with title area "R graphics: Device X (ACTIVE)". The message in the console window is
Error in plot.new() : Figure margins too large
2003 Apr 10
3
A Question on lowess() function
Hi, all,
I want to use lowess(x, y) where x and y are vectors of length of 4000+. In
fact, x and y are log of some vectors. So, some of the elements are NaN.
lowess() can not take away those elements then do the fitting. It will give
the error message and do nothing.
1. Can anybody tell me how to get rid of those NaN's and use lowess()?
2. How to get the LOWESS fitting values for any
2003 Sep 26
3
Std. errors of intercept and slope
Dear all,
I have the following output generated by linear regression. Since there is
only one regression intercept and one slope for one set of data, what is the
meaning of std. error for intercept and that of slope? Thanks in advance.
Sincerely,
Minghua
> data(thuesen)
> attach(thuesen)
> lm(short.velocity~blood.glucose)
Call:
lm(formula = short.velocity ~ blood.glucose)
2004 Aug 25
5
How to Arrange character vector in alphabetic order
Hi,
Is there any function that can arrange a character in alphabetic order? Thanks for answer
-MY
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2004 Dec 13
0
about vsn
Hello sir:
As to the "variance stabilization" method which is applied in the "vsn"package under R environment,here's a question about the ratio of the 2 channels:
After applying vsn,we can get new_cy5 and new_cy3 intensity according to the original cy5 and cy3 intensity respectively. And the new_cy5 new_cy3 are similar with ln(intensity).
But how can I calculate the
2003 Jun 27
2
NA points in loess function
Gurus,
I used
predict(loess(Y~X));
where Y and X are of the same length. But there are same NA's in both Y and
X. Those NA's are in the same locations in Y and X. The following is the
error messageI got:
Error in "[<-"(*tmp*, , i, value = predict(loess(Y~X))) :
number of items to replace is not a multiple of replacement length
If I replaced the NA's with a
2003 Apr 07
3
New window for plot()
Hi,
Can anybody tell me how to open new a new window for plot()? Thanks.
Minghua
2004 Aug 20
3
How generate "A01", "A02", ..., "A99"?
Hi,
Anyone can tell me how to generate "A01", "A02", ..., "A99"?
paste("A", 1:99, sep="") generates "A1", "A2",..., "A99". This is not what I want.
Thanks for the help.
-MY
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2003 Apr 21
2
How to assigen column of matrix
Hi,
A simple question.
I want to assign values to columns (or rows) of a matrix.
It seems that
AA[,i]<-A; # A is a vector or array;
doesn't work.
How can I accomplish that?
Thanks alot.
-MY
2004 May 20
2
Get Slot from a Class
Hello, everyone,
I don't quite understand the following message:
> TTT <- t.test(1:10, y=c(7:20))
> class(TTT)
[1] "htest"
> TTT@p.value
Error: Trying to get slot "p.value" from an object whose class ("htest") is not defined
> TTT$p.value
[1] 1.855282e-05
Why the message says the class of TTT is not defined while class(TTT) gets
2007 Apr 20
2
limmaGUI
Dear all,
I have a question about limmaGUI that is usually run in R environment.
My problem is loading data into the programm. I have 6 gpr files that
apparently are not compatible with limma. Everytime I'm trying to load
the data (including a RNA targets file, an error appears:Error reading
files. that I'm not sure,but seems to have something to do with the
format of my files
2003 Oct 07
2
Sorting matrix or data frame
Dear all,
Could anyone please tell me how to sort a matrix or a data frame against a
column/row/component?
Many thanks.
-MY
2003 Apr 04
2
sqlSave() Question
All,
I am new in R. I found sqlSave() doesn't work for our Oracle9i. The
following was the message:
> sqlSave(channel, USArrests, rownames="state")
Error in sqlColumns(channel, tablename) : USArrests : table not found on
channel
Check case parameter in odbcConnect
>
sqlQuery() works OK.
Please help. Thanks.
-MY
2003 Apr 16
2
Local parameter calculation
Dear all,
I am a newbie in R. I encounter a problem as follows.
I have 2 vectors X and Y that have a equal length of several thousand. I see
Y as the function of X. Both of them are random. X is not arrranged in any
order. Of course, I do plot(X,Y). Now, I want to use a sliding narrow window
to run over each X, then calculate the variances within that window.
Anyone knows easy way in R to do
2009 Feb 09
1
XML package- accessing nodes based on attributes
Hi,
I have a rather complex xml document that I am attempting to parse based on attributes:
<Manifest xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<!-- eName : name of the element.
eValue : value of the element. -->
<OutputFilePath>D:\CN_data\Agilent\Results\</OutputFilePath>
<FilesList>
<File>
2007 Mar 02
0
LIMMA contrast.matrix
Dear R-Help,
I am using the LIMMA User's Guide 5 January 2007 PDF version. For the
example show in Section 7.4 DIRECT TWO-COLOR DESIGNS (pgs. 33-34), I
could not grasp the rationale in developing the contrast.matrix with
these R statements (">" indicates the R command prompt):
> contrast.matrix <-