Displaying 13 results from an estimated 13 matches similar to: "loess and locpoly"
2006 Feb 23
2
locpoly
Dear R Users,
When using locpoly function, number of output values is smaller than the number of input values. How is it possible to get number of output component $y equal to the number of inputs.
Thanks a lot,
Amir
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2000 Jan 24
2
help in fortran code
I would like to get the fortran code for the functions locpol and dpill
in the kernsmooth library , the purpose is to incorporate other
selection criterion for the bandwidth in which a varying bandwidths are
replaced instead of the constant bandwidth. I will send you back the
improved version as soon as I get the fortran code for the upper mention
functions. ((LOCPOLY and DPILL )))
2005 Jul 21
1
dpill in KernSmooth package
Hi,
just a quick question does dpill computes the bandwidth or
half-bandwidth? The help says bandwidth, but in the literature there is
often confusion between the bandwidth and half-bandwidth.
thanks,
Giacomo
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2011 Feb 11
2
fitdistr question
Hello,
I tried to fit a poisson distribution but looking at the function
fitdistr() it does not optimize lambda but simply estimates the mean
of the data and returns it as lambda. I'm a bit confused because I was
expecting an optimization of this parameter to gain a good fit...
If I would use mle() of stats4 package or mle2() of bbmle package, I
would have to write the function by myself
2011 Aug 09
1
How to pass different arguments to a function within lapply()?
Hi all,
I have a data frame called "rst", see below:
------------------------------------------------------------------------------------------
# This is a paste able example
# In case you don't have "KernSmooth" package installed, please uncomment
below line.
# install.packages("KernSmooth")
library(KernSmooth)
rst <- data.frame(hsp = rnorm(23), dal =
2003 May 18
2
derivatives from loess (not locpoly)?
is there a way of estimating derivative curves, similar to the ones we get from 'locpoly', from 'loess' estimation.
i am interested in estimation of 1st and 2nd derivatives...
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2004 Mar 05
0
locpoly (was: no subject)
1. Please do make use of the subject line.
2. Please (re-)read the description of the `range.x' argument in ?locpoly:
it's suppose to be a vector of min and max x values.
3. I hope you realize how grossly inefficient this computation is...
Andy
> From: klea lambrou
>
>
> hello R-users.could you please help me on this one?i have
> 2 vectors x1
> and y1 and
2008 Sep 23
1
bandwidth selection for locpoly
Hello All,
Is there a local bandwidth selection routine for local polynomial
regression (locpoly) ?
Thanks
Chinthaka Kuruwita
2011 Jul 16
1
How does locpoly (KernSmooth package) estimate densities?
Dear R users,
I am currently using the locpoly function from the KernSmooth package to estimate densities. However, I have some trouble understanding how this estimation technique is implemented in R. My main concern comes from the fact that this function gives negative estimates when the bandwidth is sufficiently large (mainly in the tails of distributions). I have read some articles on this
2011 Aug 25
1
Autocorrelation using acf
Dear R list
As suggested by Prof Brian Ripley, I have tried to read acf literature. The main problem is I am not the statistician and hence have some problem in understanding the concepts immediately. I came across one literature (http://www.stat.nus.edu.sg/~staxyc/REG32.pdf) on auto-correlation giving the methodology. As per that literature, the auto-correlation is arrived at as per following.
2009 May 14
1
automated polynomial regression
Dear all -
We perform some measurements with a machine that needs to be
recalibrated. The best calibration we get with polynomial regression.
The data might look like follows:
> true_y <- c(1:50)*.8
> # the real values
> m_y <- c((1:21)*1.1, 21.1, 22.2, 23.3 ,c(25:50)*.9)/0.3-5.2
> # the measured data
> x <- c(1:50)
> # and the x-axes
>
> # Now I do the following:
2017 May 30
2
stats::line() does not produce correct Tukey line when n mod 6 is 2 or 3
>>>>> Serguei Sokol <sokol at insa-toulouse.fr>
>>>>> on Mon, 29 May 2017 15:28:12 +0200 writes:
> Sorry, I have seen it too late that we had different tab
> width in the original file and my editor. Here is the
> patch with all white spaces instead of mixing tabs and
> white spaces.
thank you - it still gives quite a few
2007 Jul 04
0
[1107] trunk/wxruby2: Add the 2.8 get_modifiers method to KeyEvent; remove some deprecated
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