Displaying 20 results from an estimated 403 matches for "chemistri".
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chemistry
2009 Sep 30
2
aproximate a titration kurve to the measure data.
Halo
i'm studying chemistry, today we made an experiment and i have to draw a
titration kurve for my mess data. we can do it on a mm paper, or we can also
use a programe. people from chemistry recomend "R"
last year i studied civil eng. and we used Matlab, as I see, R ist very
similar to it, but its got other comands.
But i think R would be a good help for some exercises.
so my
2010 May 06
4
Samba/LDAP share issue -- user with invalid SID
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Greetings,
While I've seen this referred to a lot of places, I haven't yet found
a posted solution that works for me. Testing has been done from a Mac
running OSX 10.5.8 Here's what I have so far: if anyone can give me a
next step to test, I'd appreciate it. If anyone can give me a complete
solution, I'd appreciate it even
2008 Mar 30
2
Definition of "wrapper"?
I think I more or less understand what a ?wrapper? is, but I?d like to hear
how more experienced R users define it, and especially I'd like to know if
there is a formal definition. In my reading, it seems like there are a
fairly wide range of meanings, but they are all conceptually similar.
I've looked in a couple of the classic R texts, the extensions and
developers' manuals, and R
2016 Dec 21
2
different compilers and mzR build fails
I'm not sure if I should bother you team with this,
apologies in case it's a bother.
I'm trying gcc 6.2.1 (from devtoolset-6) with R, everything
seems to work just fine, except for mzR.
Here is failed build:
g++ -m64 -shared -L/usr/lib64/R/lib -Wl,-z,relro -o mzR.so
cramp.o ramp_base64.o ramp.o RcppRamp.o RcppRampModule.o
rnetCDF.o RcppPwiz.o RcppPwizModule.o RcppIdent.o
2010 Feb 08
1
auto mounting group shares
I am using autofs to mount user's home and group directories. The
setup works fine for home directories which are mounted after user
logs in. The group shares are also mounted, but user has to manually
do cd or ls command on group shares, e.g.: ls /groups/chemistry will
mount chemistry group share. Is there any way to mount group shares
automatically?
I noticed that after successful login
2009 Nov 16
4
Where are usages like "== 2L" documented?
Gurus:
I keep seeing other people?s code that contain ideas like
If (x == 2L)
X[-1L]
X - 1L
I have some idea of what?s going on, but where is the use of concepts like
?2L? documented?
Thanks, Bryan
*************
Bryan Hanson
Acting Chair
Professor of Chemistry & Biochemistry
DePauw University, Greencastle IN USA
1999 Jul 22
1
Compiling on AIX3.2.5
I have tried to compile 2.0.4b and 2.0.5a on AIX3.2.5 and it
gives a problem when I test it with "smbclient -L bigserver",
that was discussed in the archives. I thought it was fixed.
It gives:-
[1999/07/22 20:57:05, 0] smbd/uid.c:(68)
Couldn't set effective uid to 207. Currently set to (real=0,eff=0).
Error was
Not owner
[1999/07/22 20:57:05, 0] smbd/service.c:(463)
Can't
2011 May 11
2
Line feed for a long character string
Dear all,
Does anyone know how to make a line feed automatically based on the width of
console window? For example, when you cat() a long character string just
like this:
cat("Seminar series is an opportunity for students to learn about ongoing
researches in the field of mathematics, computer science, physics,
chemistry, and some other related programs. Students must complete a seminar
2013 May 02
2
rda variance partioning in vegan problems
This is not a request for coding help so there is no reproducible code,
rather I am trying to figure out if anyone had had a similar experience.
My question is related to partitioning the variance in rda (vegan) results
for multiple groups of variables. I have a high dimensional dataset with
79 explanatory variables and 9 response variables. Within those 79
explanatory variables there are ~8
2012 Jan 24
4
Virus Infection in colorspace_1.1-1.zip (R x64 2.14.1)
I keep finding the Win32\Huer virus in colorspace_1.1-1.zip for R x64 2.14.1
running MS Windows 7. As a result I am not able to use rattle or
ChemometricsWithR. I have tried several different mirrors with the same
result. Fortunately AVG has caught and quarantined the problem, but the
colorspace package is not available.
I can use the package on my Linux OS, but, of course, Linux
2018 May 22
0
remove rows of a matrix by part of its row name
Hello,
Please always cc the list.
As for the question, yes, it does. If you want to remove just the ones
with exactly 73.1 use the pattern
grep("^73\\.1$", etc)
Explanation:
Beginning of string: ^
End of string: $
Escape special characters: \\ (needed because the period is a special
character.)
Hope this helps,
Rui Barradas
On 5/22/2018 12:50 PM, Ahmed Serag wrote:
> Thank
2016 Dec 21
1
different compilers and mzR build fails
I do this on a vanilla-clean R installation, simply:
> biocLite("mzR")
it pulls some deps in which compile fine, only mzR fails.
... meanwhile...
I grabbed devtools and comiled github master - still fails.
Should I attach build log? One should not send attachments
to the list.. I don't suppose?
On 21/12/16 17:06, Martin Morgan wrote:
> mzR is a Bioconductor package, so
2004 Nov 11
5
expressions and paste
I have written a function to plot data which will be used for various different chemistries.
A simplified version is:
plot_data <- function(risk,levels,chem,sd2,measure){
plot(risk, levels,main=paste ("per", sd2, measure, "\n in usual", chem))
}
The problem is with the title.
This works fine if the variable "chem" is just text, but if it is an expressi...
2018 Nov 05
2
ORC JIT api, object files and stackmaps
I have a few questions about the new ORC JIT.
I saw Lang Hames (hi!) excellent talk at the llvm-dev meeting a few weeks
ago. The ORC JIT is undergoing some API changes and I'd like/need to take
advantage of them.
(1) How do I take ownership of the ObjectFile once the ORC JIT has created
it?
I'd like to take ownership of object files generated by the ORC JIT so
that I can save them to
2010 Oct 01
2
Issues loading rtiff 1.4.1 with R 2.6.2 on Windows
Dear R-users,
I successfully installed rtiff on by R installation, but when I tried to
load it, I got:
>local({pkg <- select.list(sort(.packages(all.available = TRUE)))
+ if(nchar(pkg)) library(pkg, character.only=TRUE)})
Error in dyn.load(file, ...) :
unable to load shared library
'C:/PROGRA~1/R/R-26~1.2/library/rtiff/libs/rtiff.dll':
LoadLibrary failure: Das angegebene Modul
2011 Oct 20
1
p-val issue for ranked two-group test
Hi-
I'm wondering if anyone can help me with my code. I'm coming up dry
when I try to get a p-value from the following code. If I make a
histogram of my resampled distribution, I find the difference between
by groups to be significant. I've ranked the data since I have
outliers in one of my groups.
mange= c(35, 60, 81, 158, 89, 130, 90, 38, 119, 137, 52, 30,
27,
2008 Jul 29
2
Is there anyway to clip the bottom of a barplot?
Hi, all,
I need to show only values in a barplot from say 4-12. When I do
this, values below 4 are not cutoff. I would appreciate any input
into how I could cut the bottom part of the bar off.
Best wishes,
Art Roberts
University of Washington
Department of Medicinal Chemistry
2002 Apr 11
3
new acf package
I'm a PhD student and I'm working with covariance function. I'm interested
to know if exist some packages in R to calculate and plot the
bidimensional Autocovariance Function. the input matrix is a matrix that
describe a spatial location over a 2-D space and I want to use it in the
same way I can use a time serie in the 1-D acf.
Thanks,
Nicola.
2002 Apr 11
3
new acf package
I'm a PhD student and I'm working with covariance function. I'm interested
to know if exist some packages in R to calculate and plot the
bidimensional Autocovariance Function. the input matrix is a matrix that
describe a spatial location over a 2-D space and I want to use it in the
same way I can use a time serie in the 1-D acf.
Thanks,
Nicola.
2016 Dec 21
0
different compilers and mzR build fails
mzR is a Bioconductor package, so better to ask on the Bioconductor
support forum
https://support.bioconductor.org
Oh, I see you did, and then the advice is to avoid cross-posting!
The missing .o files would have been produced in an earlier compilation
step; they likely failed in some way, so you need to provide the
complete compilation output.
Did you do this on a version of the package