Displaying 5 results from an estimated 5 matches for "rkern".
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2004 Nov 13
3
density estimation: compute sum(value * probability) for given distribution
...; length(cap)
[1] 200
> summary(cap)
Min. 1st Qu. Median Mean 3rd Qu. Max.
459.9 802.3 991.6 1066.0 1242.0 2382.0
I need to compute the sum of the values times their probability of
occurence.
The graph is fine,
den <- density(cap, from=min(cap),
to=max(cap), give.Rkern=F)
plot(den)
However, how do I compute sum(values*probabilities)? The
probabilities produced by the density function sum to only 26%:
> sum(den$y)
[1] 0.2611142
Would it perhaps be ok to simply do
> sum(den$x*den$y) * (1/sum(den$y))
[1] 1073.22
?
Thank you,
b.
2012 Jul 26
2
density
...very much.
Hannah
x <- rnorm(1000)
> bw.nrd(x)
[1] 0.2688588
> bw.nrd0(x)
[1] 0.2282763
> bw.ucv(x)
[1] 0.2112366
> bw.bcv(x)
[1] 0.2890085
Warning message:
In bw.bcv(x) : minimum occurred at one end of the range
> bw.SJ(x)
[1] 0.2716242
> density(x, give.Rkern=T, kernel="gaussian")
[1] 0.2820948
> density(x, kernel="gaussian")
Call:
density.default(x = x, kernel = "gaussian")
Data: x (1000 obs.); Bandwidth 'bw' = 0.2283
x y
Min. :-3.974672 Min. :0.0000199
1st Qu.:-1.9877...
1999 Dec 15
1
R-0.90.1 is released
...reserved word
in C) for R complex objects passed to C.
o new function dir.create() for platform-independence.
o help.search() creates a database for faster searching later in
the R session.
o density() allows for more kernels and has a new argument
`give.Rkern' to access the relevant kernel property.
o multivariate methods for ar: "yule-walker" (now in C) and
"burg" (new) contributed by Martyn Plummer.
o New data sets `HairEyeColor' (hair and eye color of statistics
students), `Titanic' (survi...
1999 Dec 15
1
R-0.90.1 is released
...reserved word
in C) for R complex objects passed to C.
o new function dir.create() for platform-independence.
o help.search() creates a database for faster searching later in
the R session.
o density() allows for more kernels and has a new argument
`give.Rkern' to access the relevant kernel property.
o multivariate methods for ar: "yule-walker" (now in C) and
"burg" (new) contributed by Martyn Plummer.
o New data sets `HairEyeColor' (hair and eye color of statistics
students), `Titanic' (survi...
2012 Mar 21
1
enableJIT() and internal R completions (was: [ESS-bugs] ess-mode 12.03; ess hangs emacs)
...n for 'fft'
Note: no visible global function definition for 'approx'
[1] "x=" "...=" "bw=" "adjust=" "kernel=" "weights="
[7] "window=" "width=" "give.Rkern=" "n=" "from=" "to="
[13] "cut=" "na.rm="
Disabling JIT warnings removes the notes, but the call remains to be
extremely slow, as the compiler still processes all the exceptions.
Thanks,
Vitalie.
>>...