Displaying 20 results from an estimated 2000 matches similar to: "MatLab SimBiology"
2009 Jan 27
3
plot Ticks
Is there a way to force the number of ticks along an axis ?
I read the on-line documentation and tried many combinations of all available parameters from functions
par(), axTicks(), axis(), plot() ... but no luck !
Thank you very much,
Maura
tutti i telefonini TIM!
[[alternative HTML version deleted]]
2009 Dec 13
3
CRAN (and crantastic) updates this week
CRAN (and crantastic) updates this week
New packages
------------
* Bergm (1.0)
Alberto Caimo
http://crantastic.org/packages/Bergm
Functions implementing Bayesian estimation for exponential random
graph models via exchange algorithm
Updated packages
----------------
lmtest (0.9-26), logcondens (1.3.5), MTSKNN (0.0-4), pmml (1.2.21),
r2lUniv (0.9.4), rattle (2.5.11), rgdal (0.6-23),
2010 May 27
3
how to extract the 1st field from a vector of strings
I have the following vector of strings (shown only the first 3 elements)
> desc[1:3]
[1] "hsa-let-7a MIMAT0000062 Homo sapiens let-7a"
[2] "hsa-let-7a* MIMAT0004481 Homo sapiens let-7a*"
[3] "hsa-let-7a-2* MIMAT0010195 Homo sapiens let-7a-2*"
> is.vector(desc)
[1] TRUE
> A <- unlist(strsplit(desc[1:3], " "))
> A
[1]
2010 Mar 31
2
Generative Topographic Map
I tried to use R version of package
I noticed the original MatLab Pckage is much better documented.
I had a look at the R demo code "gtm_demo" and found that variable Y is used in advanced of being created:
I wrote my own few lines as follows:
inDir <- "C:/Documents and Settings/Monville/Alanine Dipeptide/DBP1/DHA"
setwd(inDir)
T <-
2010 Apr 17
4
how to remove one row at a time from a matrix keeping its nrow consistent
After some headache with debugging my script, I finally isolated the problem taht I am going to illustrate in the following example.
I expected matrix nrow to decrease consistently till 1. Instead, when the matrix is left with one row only, its nrow jumps to 2 because the matrix
gets transposed. How come ?
Thank you,
Maura
> B <- c(1,2)
> B <- rbind(B,c(3,4))
> B <-
2009 Jun 16
2
R and miRecords
I wonder whether R provides an interface to access miRecords data.
Particularly, I am looking for extracting humans miRNA and target genes sequences.
All such information is stored in there in a set of structured web site pages (http://mirecords.umn.edu/miRecords)
I would greatly appreciate any suggestion even about other data bases from where it is possible to get the same sort of data.
I had a
2009 Jan 03
4
passing parameters to an R script
I knowf R functions ca be called passing some parameters.
My first question is: how are parameters passed to R functions ?
Browsing through R archives I found an answer confirming taht parameters can
be passed to the called function by value. I wonder whether passing the parameter
address is possible somehow to allow the function to actually change its value.
My second question is about
2009 Jun 23
2
question about package biomaRt
Can biomaRt connect to data base "http://mirecords.umn.edu" or a branch of it ... for instance the validated miRNAs list ..?
Thank you very much.
Maura
tutti i telefonini TIM!
[[alternative HTML version deleted]]
2009 Mar 29
4
binary AND operators in R
I cannot find any R function or operator that performs a binary AND operation, as performed by Fortran built-in function "iand".
Ideally either R operator "&" or "&&" should do that. But some tests proved they do not:
> A<- 1
> B <- 2
> A
[1] 1
> B
[1] 2
> as.numeric(A&B)
[1] 1
> as.numeric(A&&B)
[1] 1
The binary
2008 Jun 09
1
Questions about building R extensions from C, data/ and man/, sbml file
Hi,
I am building the package in R using
>R CMD build -force ./mypackage
and check it using
>R CMD check ./mypackage
However I have a problem when running the examples in the manual files. The
problem is that I used a specifice type of file that is not table, thus I
guess data() can't be use to indicate the use of that particular file in the
directory data/. Do you have any idea how
2010 Jan 21
2
Updating R on Linux
I know my question has been asked many times. Please, forgive me for asking it once more.
It's time to update R version.
I run R on Windows, Linux, and Mac OS/X.
I think I remember on Windows R comes with the un-installer. So I uninstall it first and then I install the latest version.
On Mac OS I have no experience of updating R ... I think (and hope) all what I have to do is to drag R
icon
2010 May 25
2
website address for the pseuso-XLS files
http://gigamail.rossoalice.alice.it/messages/readMessageFrameset.aspx?DeliveryID=ba40cf18-29db-4404-a3ce-af26f760ecf9
Please, paste the website address above shown in your web browser address field.
Make sure the whole string is pasted with no space or any other character.
Telecom couldn't generate more clumsy website addresses .... Sorry for that.
Thank you in advance,
Maura
tutti i
2009 Jul 01
3
is there a way to extract fata from web pages through some R function ?
I deal with a huge amount of Biology data stored in different databases.
The databases belongig to Bioconductor organization can be accessed through Bioconductor packages.
Unluckily some useful data is stored in databases like, for instance, miRDB, miRecords, etc ... which offer just an
interactive HTML interface. See for instance
http://mirdb.org/cgi-bin/search.cgi,
2008 Nov 11
1
R: R: Hidden Markov Models
Thank you for your prompt answer.
The breathing signal observations are the amplitude values as a function of time and phase.
According to our model the hidden states are the different breathing types.
Subjects, whose respiratiion process is regular, are likely to breathe, keeping the same cycle pattern/type,
for many consecutive cycles. therefore dwelling in the same hidden state.
The more
2009 May 24
2
how to implement a circular buffer with R
Some wavelet analysis experts have implemented periodic boundary conditions for signals.
I need to implement a circular buffer. Something like:
"12345abcdefgh12345abcdefgh"
so that at each step the riightmost element is moved to the leftmost index and everything else is properly shifted:
"h12345abcdefgh12345abcdefg", "gh12345abcdefgh12345abcdef", ....
My
2009 Jan 26
2
Help with clustering
I am going to try out a tentative clustering of some feature vectors.
The range of values spanned by the three items making up the features vector is quite different:
Item-1 goes roughly from 70 to 525 (integer numbers only)
Item-2 is in-between 0 and 1 (all real numbers between 0 and 1)
Item-3 goes from 1 to 10 (integer numbers only)
In order to spread out Item-2 even further I might try to
2009 Apr 26
2
eager to learn how to use "sapply", "lapply", ...
After a year my R programming style is still very "C like".
I am still writing a lot of "for loops" and finding it difficult to recognize where, in place of loops, I could just do the
same with one line of code, using "sapply", "lapply", or the like.
On-line examples for such high level function do not help me.
Even if, sooner or later, I am getting my R
2009 Feb 26
3
Moving Average
I am looking for some help at removing low-frequency components from a signal, through Moving Average on a sliding window.
I understand thiis is a smoothing procedure that I never done in my life before .. sigh.
I searched R archives and found "rollmean", "MovingAverages {TTR}", "SymmetricMA".
None of the above mantioned functions seems to accept the smoothing
2009 Apr 22
1
Color coded 3D plot
I wonder whether it is possible in R to generate color-coded 3D plots, like the attached example.
Basically a function f(x,y) (the 3rd dimension) is rendered through colors intensities. The side color-bar is a guide to the
interpretation of the plot.
Thank you very much,
Maura
e tutti i telefonini TIM!
Vai su
e tutti i telefonini TIM!
Vai su
2010 Mar 03
1
R help unavailable
I have recently replaced R-2.9.0 with R-2.10.1 Patched. Apparently the installation completed successfully
but right now I realized that the on-line help does not work any more.
When I type "?<R-command>" a message pops up warning that "Help will not be available. Path not found" ... regardless of the R-command.
How can I get back R on-line man pages ?
Thank you very