Displaying 20 results from an estimated 20000 matches similar to: "how to generate a function from a linear model"
2005 Apr 05
5
R can not show plots (in Mac OS X terminal)
Dear all:
I am a newbie in Mac. Just installed R and found R did not react on my
command plot (I use command line in terminal). It did not give me any
error message, either. All it did was just giving out a new command
prompt--no reaction to the plot command. I suppose whenever I gives out
a command of plot, it will invoke the AquaTerm for a small graph, as I
experience in octave. What can I
2004 Dec 29
2
icecast2.2 and aac?
Trying to get the LE version for months now, still treamguys can?t
deliver....
Regards,
Dennis Heerema
-----Original Message-----
From: "Greg J. Ogonowski" <greg@orban.com>
To: qiang Bao <jakobao@yahoo.com>, icecast@xiph.org
Date: Wed, 29 Dec 2004 11:08:04 -0800
Subject: Re: [Icecast] icecast2.2 and aac?
Icecast 2.2 works fine with AAC/aacPlus at any bitrate.
32kbps
2016 May 01
2
Storage of byte code-compiled functions in sysdata.rda
Hi r-devels,
we are seeing a new problem with our packages RobAStRDA (just new on CRAN, thanks
to Uwe and Kurt!) and RobExtremes (to be submitted).
It must be something recent with the way you internally treat/store byte-code compiled
functions, as we have no problems with R-3.1.3, but do see an "Error in fct(x) : byte code
version mismatch" with R-devel SVNrev r70532.
Background:
2006 Mar 17
1
Derivative of a splinefun function.
Is there a way of calculating the derivative of a function returned
by splinefun()? Such a function is a cubic spline, whence it has a
calculable derivative, but is there a (simple) way of getting at it?
One workaround that I have thought of is to take a fine grid of
points, evaluate the function returned by splinefun() at these
points, put an interpolating spline through these points using
2010 Mar 12
1
Usage of apply function with two matrices
Hello,
I am struggling to overcome following problem:
I have matrix Vf and matrix V, which both have 3 columns and I want to
create a spline function basing on coordinates from this matrices (more
precisely coordinates of function nr 1: x are taken from Vf[,1] and y are
taken from V[,1] respectively), because function apply() base on 1 argument
I made it in this way:
2010 Feb 15
1
Non-monotonic spline using splinefun(method = "monoH.FC")
Hi,
In my version of R, the stats package splinefun code for fitting a
Fritsch and Carlson monotonic spline does not appear to guarantee a
monotonic result. If two adjoining sections both have over/undershoot
the way the resulting adjustment of alpha and beta is performed can give
modified values which still do not satisfy the required constraints. I
do not think this is due to finite precision
2008 Oct 06
1
splinefun gives incorrect derivs when extrapolating to the left (PR#13132)
This is a low priority bug that has been around for a while, but I came acr=
oss it again while alpha testing 2.8.
The resulting function for splinefun gives incorrect deriv values when x is=
less than the smallest x-value used to create the function (at least in on=
e circumstance), but does the correct thing for x greater than the largest =
x-value.
Here is an example:
> x <- 1:10
>
2007 Nov 14
1
problems with splinefun()
I am working with the function: splinefun() ...
When plugging in the variables, I get the function program as if
though having only entered '"splinefun". only way to get the values
is by
spline(xxx,yyy, n=length(xxx)/10, ties = mean)$x and spline(xxx,yyy,
n=length(xxx)/10, ties = mean)$y.
I'm just wondering if there is something wrong with the package or if
I'm doing
2006 Feb 10
1
3-d splinefun
hello,
is it possible to do something like splinefun(x,y), but with a 3rd
dim?
for example, if i have a 2-dim system like:
x<-1:100
y<-rexp(100,1)
func<-splinefun(x,sort(y))
func(n) # returns interpolated value of y (after sorting) given x=n
# i can check this by:
plot(x,sort(y))
lines(spline(x,sort(y)))
Can i do the same thing with an x,y, and z? i have found the akima
2016 May 01
2
Storage of byte code-compiled functions in sysdata.rda
Thanks, Luke, for having a look to it.
Sure, I can give you some reproducible example -- even in two degrees of
completeness ;-): see below.
Thanks again, Peter
%-----------------------------------
(I) first example
%-----------------------------------
Just to reproduce the error, on r-devel, try:
install.packages("RobAStRDA")
require(RobAStRDA)
getFromNamespace(".RMXE", ns
2007 Jul 12
4
file couldn't play after Speex encode and decode
Dear sir,
I've a problem that the .wav file couldn't play after calling "sampleenc
male.wav|sampledec male_speex_15.wav".I found that the new file
male_speex_15.wav is smaller than the original file in size.I implemented
the test on Linux system.The original file male.wav is 96044 bytes,while the
new file male_speex_15.wav is 96000 bytes.I'm eager to know the reason.Thankyou!
2009 Mar 31
2
How to generate natural cubic spline in R?
Suppose I have two var x and y,now I want to fits a natural cubic
spline in x to y,at the same time create new var containing the
smoothed values of y. How can I get it?
2011 May 27
1
finding derivative of a data series in R
Dear All,
I tried following for getting derivative of a polynomial in R
i<- -10:10
x<-i*i*i+3*i*i+2
fun_spline<-splinefun(i,x)
plot(x,type="l")
lines(x,fx_spline(x, deriv=1), col='green')
lines(x,fx_spline(x, deriv=2), col='green')
Now when I plot
3*i*i + 6*i and 6*i + 6
the plot was not same for first deivative.
where as the 2nd derivative was same
Is this a
2007 Aug 07
2
speex compression rate
I want to know speex compression rate. On the speex website,it says" Speex
is based on CELP and is designed to compress voice at bitrates ranging from
2 to 44 kbps." Is the original voice at bitrates raning from 2 to 44 kbps,or
the compressed voice at bits ranging from 2 to 44 kbps? what is the maxmium
compression rate?
Thanks a lot!
Weiqin Bao
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An
1998 May 25
2
RFC: spline / splinefun (etc) amalgamation
At present R has separate functions "spline" and "splinefun". The first
of these carries out spline interpolation of a data set and returns the
interpolated values; the second returns the interpolating function itself
(approx and approxfun are similar).
I would like to combine these into a single function "spline" with
an (optional) argument which determines which
2010 Apr 02
2
How to save a model in DB and retrieve It
I'm wondering how to save an object (models like lm, loess, etc) in a DB to retrieve and use it afterwards, an example:
wind_ms <- abs(rnorm(24*30)*4+8)
air_kgm3 <- rnorm(24*30, 0.1)*0.1 + 1.1
wind_dg <- rnorm(24*30) * 360/7
ms <- c(0:25)
kw_mm92 <- c(0,0,0,20,94,205,391,645,979,1375,1795,2000,2040)
kw_mm92 <- c(kw_mm92, rep(2050, length(ms)-length(kw_mm92)))
modelspline
2005 Jul 24
1
Buglet in src/appl/splines.c (PR#8030)
--AZaLVt6Pw+
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Dear all,
I was looking at "splinefun" and the underlying C code and believe
that there is a memory access error in the C routine "spline_eval".
Specifically, on line 368 and following the following code appears:
if(ul < x[i] || x[i+1] < ul)
2006 Feb 23
1
[LLVMdev] Questions on LLVM and binary translation
Hi,
I'm currently investigating LLVM to see whether it can be used in
dynamic binary translation. My goal is to translate different "source"
machine code into the "target" machine code during runtime, e.g., MIPS
-> x86. LLVM has a well-defined intermediate representation to separate
source and target machine code (source -> LLVM Bytecode -> target), and
is a
2017 Aug 26
1
Fwd: Find maxima of a function
Hi,
Thanks for your mail, and time
It is not working for some arguments, when mean value is like >6.
case
mc0 <- c(0.08844446,0.1744455,0.1379778,0.1209769,0.1573065,0.
1134463,0.2074027)
rv <-UnivarMixingDistribution(Norm(486.4255, 53.24133),
Norm(664.0713, 3.674773),
Norm(669.0484, 4.101381),
2006 Apr 27
12
how to do a count with a variable...
hi guys, got this problem...
in my controller, when i wanna do a @temp.count it fails...
then i went to try counter = @temp.count which also failed..
thus, i feel that the count is not available for ActiveRecord::Base..so
i went to the Model class eg. user.rb
so in user.rb :
...
def count_uesr
count = 0
self.each do |record|
count ++
end
return count
end
then it ended up having