Displaying 20 results from an estimated 20000 matches similar to: "Query"
2012 Sep 30
1
Query
Dear All,
If possible please let me know whether I can find solution of following
problem using R or not?
I have to select 6-10 parameters whose range are given but I need to select
the parameter values which satisfies 5-6 known conditions
i.e. to find a suitable parameters satisfying given conditions where we
only know the range of parameters.
Thanks and regards,
Mini Ghosh
[[alternative
2009 Aug 27
2
Comparing and adding two data series
Dear R helpers
I have two series A and B as given below -
A <- c(2, 2, 1, 3, 7, 3, 3, 1, 14, 7, 31)
B <- c(0.0728,0.9538,4.0140,0.0020,2.5593,0.1620,2.513,0.3798, .0033,0.2282, 0.1614)
I need to calculate the total in dataset B corresponding to the numbers in dataset A i.e. for no 1 in A, I need the total as 4.0140+0.3798 (as 1 is repeated twice)
for no 2, I need the total as
2003 Mar 27
7
Request
Dear all,
I am trying to learn R.
Is it possible to find the mean of some rows (of some table) and to put it
in new table.
For example we have following table
date x y z
1 05-23-2001 7 1 3
2 05-24-2001 8 4 5
3 05-24-2001 6 0 0
4 05-24-2001 26 2 6
5 06-19-2001 0 7 0
6 06-19-2001 5 0
2009 Sep 12
1
medcouple-based outlier detection in R
I need to detect outliers in a large data set which is highly right-skewed. I plan to use medcouple-based outlier detection. Is there any support for medcouple-based outlier detection in R? Are there any other routines in R to perform outlier detection in highly right-skewed data?
Manuj Sharma
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2010 Apr 26
1
finite difference scheme for 2D differential equations
Hello everyone,
I am trying to solve 2D differential equations using finite difference
scheme in R. I have been able to work with the equations with only one
spatial dimensions but I want to extend it to the two dimensional problem.
For example i can simulate one dimensional diffusion using a code like the
following. But I want to write a similar code for,say, a two dimensional
diffusion
2010 Jun 30
1
Solution to differential equation for nls function
Hello,
I am trying to find the analytical solution to this differential equation
dR/dt = k1*R (1-(R/Rmax)^k2); R(0) = Ro
k1, k2, and Rmax are parameters that need to fitted, while Ro is the
baseline value (which can be fitted or fixed). The response (R) increases
initially at an exponential rate governed by the rate constant k1.
Response has a S-shaped curve as a function of time and it
2010 Feb 15
0
Exponential Fitting to Credit default data - A theoretical query
Dear R helpers
I am working on the credit risk default data and am referring to "An introduction to Credit Risk Modelling" by Christian Bluhm. The literature affirms that 'the default frequencies grow exponentially with decreasing credit worthiness'.
I have a data of rating wise default frequencies. The idea is to fit exponentail of the type
Y = a * exp( b*X ) where Y is
2005 Jan 06
1
arrays emerging from tapply
The code below illustrates some points about results from tapply that
I find strange. I wonder if they are intended and if so why it is so.
1) When you make a table the dimnames is a *named* list, tapply
returns an unnamed list.
2) data.frame behaves differently on an array and a table. Is this
an intended feature?
3) For tables class(TAB) and attr(TAB,"class") both return
2012 Jul 18
1
Defining a variable outside of optim or differential equation solver.
This is applicable to either using optim or the differential equation
solver or any similar solver
Suppose I want to use the differential equation solver and this is my code
d<-y[2]
vdpol<-function(t,y)
{
list(c(1,
d,
3,
4
)
}
stiff<-ode(y=rep(0,4),times=c(0,1),func=dvdpol,parms=1)
The thing is I want d to be composed of one of state variables in the
2009 Sep 14
1
R: error while loading shared libraries: libRblas.so:
Hi,
I am trying to debug R on fedora9.0. When I use gdb to debug R-1.9.2, I am getting the error "R: error while loading shared libraries: libRblas.so: cannot open shared object file: No such file or directory"
"Program exited with code 0177.
Missing separate debuginfos, use: debuginfo-install glibc.i686"
I have libRblas.so shared library in two paths,
1)
2009 Jul 21
1
lmom - Estimating Normal Distribution Parameters using lmom package
Dear R helpers,
I have a data of 2102 observations (consisting of 0's also), to which I am trying to fit Normal distribution using "lmom" pacakage. If I use Excel, its easy to estimate the parameters of Normal distribution as simple mean and standard devaition. The results I get if I use teh excel are as
Parameters of Normal distribution :-
Mean = 22986.44 and standard
2011 Mar 25
0
[LLVMdev] set line number debug info
Oh! I made a mistake by not using setDebugInfo() function present in the
Instruction class. Now it's working fully.
So, the solution is:-
To set the line number for an instruction -
1. Add a function in DebugLoc class located in llvm/Support/DebugLoc.h. Set
the line number there to the private variable called LineCol.
2. Call the added function. And then pass the modified DebugLoc object to
2002 Mar 15
1
Wine dummy-spitting
I've got a real problem with the debian (unstable) wine 0.0.200202228-1
Whenever I try to run a windows executable - of any sort, although it's
Jeskola Buzz in the example I've attached - wine cheerfully spits the
dummy. I realise that the DRIVE_Init warnings are ignorable, but
#warn:dosfs:DOSFS_FindUnixName 'config\system' not found in ...
#warn:dosfs:DOSFS_FindUnixName
2018 Feb 27
0
Level of support for ARM LLD
I think ARM ELF is pretty good. I was able to link clang with it some
time ago and it now has support for thunks.
Cheers,
Rafael
Sumonto Ghosh <sumonto.ghosh at gmail.com> writes:
> Thanks Rafael, wondering as of what is the level of support for ARM and is
> it close to production quality?
>
> Thanks
>
> On Mon, Feb 26, 2018 at 2:06 PM, Rafael Avila de Espindola <
2011 Feb 22
1
S3 classes and building a package
Hi List!
Suppose I have the following, please:
> setClass("buzz",representation(x="numeric"),S3methods=TRUE)
[1] "buzz"
> x <- rnorm(10)
> class(x) <- "buzz"
> plot.buzz <- function(x,y,...) {
+ plot.default(x,type="l",col="blue")
+ }
> f <- function(x) {
+ return(x^2)
+ }
>
2009 Aug 20
1
Xen boot probe
Hi,
These are my make menuconfig screen shots. I haven''t found any
xen option in v2.6.30-rc. Why is that so? this happens with most of the
version. What should I do? should I just let it as it is an run the
make command to build the kernel?
Regards,
Fasiha Ashraf
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Love Cricket?
2005 Oct 27
1
Fitting of Non-Linear Diff Equations and Parameter Estimation
Hello Everybody,
I am running R 2.2.0 with Windows XP
i am trying to fit nonlinear differential equation to data sets which looks
like this:
Week N C
0 1 1
1 5 6
2 6.2 12.2
3 59 71.2
4 39 110.2
5 38 148.2
6 44 192.2
7 20.4 212.6
8 19.4 232
9 34.2 266.2
10 35.4 301.6
and i need to fit these data to the following diff equation:
dNdt=a*N-b*N*C, dCdt=N^2,
Where a=birth rate, b=death rate and N=
2012 Jan 13
1
analytical solution of partial differential equation
i am trying to solve a partial differential equation analytically(PDE) in R .
i have found some functions that do the stuff numerically. But that will not
meet my purpose. is there any function to solve PDE analytically. please
help.
--
View this message in context: http://r.789695.n4.nabble.com/analytical-solution-of-partial-differential-equation-tp4291618p4291618.html
Sent from the R help
2018 Feb 27
0
Level of support for ARM LLD
Hello Sumonto,
There are several upstream build bots that run the Arm specific LLD
tests. You can find these tests in the lld/test/ELF directory, they
all start with arm. At Linaro we are planning to set up a build-bot,
modelled on the equivalent AArch64 one that does a 2 stage build of
clang with LLD as the linker, this will also include running the test
suite.
For the ELF port; the major Arm
2018 Feb 27
2
Level of support for ARM LLD
Is there a regression bot with a list of tests or alike
Thanks
On Mon, Feb 26, 2018 at 4:19 PM Rafael Avila de Espindola <
rafael.espindola at gmail.com> wrote:
> I think ARM ELF is pretty good. I was able to link clang with it some
> time ago and it now has support for thunks.
>
> Cheers,
> Rafael
>
>
> Sumonto Ghosh <sumonto.ghosh at gmail.com> writes:
>