Displaying 20 results from an estimated 6000 matches similar to: "estimate distributed lag model using matrix algebra"
2004 Apr 16
1
Distributed lag model
Has anyone writtent an R function for estimating linear
models with distributed lags(using matrix algebra)?
Y(t) = Bo + B1Xt-1+ B2Xt-2+e
Thanks,
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2013 Apr 01
1
Parameter Estimation in R with Sums and Lagged Variables
Hi guys,
I am afraid I am stuck with an estimation problem.
I have two variables, X and Y. Y is explained by the weighted sum of n
lagged values of X. My aim is to estimate the two parameters
c(alpha0,alpha1) in:
Yt = Sum from j=1 to n of ( ( alpha0 + alpha1 * j ) * Xt-j )
Where Xt-j denotes the jth lag of X.
I came up with this approach because I thought it would be a good idea to
estimate
1997 May 11
2
R-alpha: Logarithmic scales
Here are another three problems with logarithmic scales:
1) segments() does not work with logarithmic scales. I suggest to change
lines 962-973 in "plot.c":
for (i = 0; i < n; i++) {
if (FINITE(xt(x0[i%nx0])) && FINITE(yt(y0[i%ny0]))
&& FINITE(xt(x1[i%nx1])) && FINITE(yt(y1[i%ny1]))) {
GP->col = INTEGER(col)[i % ncol];
1997 Jun 23
0
R-alpha: various graphics Q.
"contour" can't return a list of contours (it would be nice)
"arrows" has different options from S-PLUS (no "open" or "rel" options,
no "lwd" parameter or graphics parameter pass-through; "size" in S
corresponds to "length" in R). [I know we needn't follow S-PLUS syntax
slavishly, but it would be nice at least to
2000 Oct 19
0
legend -- one more try
Dermot MacSweeney pointed out to me that after my "fix" of legend(),
points were no longer coming out placed in the middle of the lines, but at
the right-hand edge. It turns out that naively swapping the order of
point-drawing and line-drawing also messes up the bookkeeping that
legend() does on the current x-location. Here's my patch, which fixes
that bookkeeping (and incidentally
2001 Jan 15
0
legend() patch never seems to have made it in
Perhaps I should have submitted this as a bug so that it would be
officially tracked. It's not a big deal, but here it is again (I can't
remember which version this patch is against, but I don't think legend()
has changed since then ...)
Basically, the problem is that if you want to have "opaque" points that
overlay lines (rather than using type="b" and having
2010 Dec 08
2
VARMA
Hi all,
I want to estimate parameters from a VARMA(p,q)-Modell.
The equations of the model or the model structures is given by:
Xt=beta1+beta2*Xt-1+beta3*Yt-1+epsilon1
Yt=beta4+beta5*Yt-1+espilon2
epsilon1 and espilon2 are white noise.
Xt is given by a vector of n elements e.g. (2, 4, 7, 9, …,n)’ and Yt is
given by a vector of n elements e.g. (4,9,12,17,…,n)’.
The lineVar from
2001 Feb 15
1
cointegrating regression
Hi all,
Can I run a cointegrating regression, for example
delta Xt=a1(Yt-1-cXt-1)+E1t
and
delta Yt=-b1(Yt-1-cXt-1)+E2t
with R were
Xt and Yt are non stationary time series at t
a,b,c are parameters and E1t and E2t are error terms at t.
Yt-Xt is stationary
Any suggestions are welcome.
Best regards,
/fb
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing
2008 Jun 20
2
Problems with basic loop
I'm having trouble creating a looping variable and i can't see wher ethe
problem arises from any hep gratfully appreciated
First create a table
x<-table(SURVEY$n_0,exposed)
> x
exposed
False True
Under 16 24 1
16-19 68 9
20-24 190 37
25-34 555 204
35-44 330 87
45-54 198 65
55-64 67 35
65+
2007 May 07
0
Analyzing "Stacked" Time Series
I have a question about pooling or "stacking" several time series
?samples? (sorry in advance for the long, possibly confusing, message).
I'm sure I'm revealing far more ignorance than I'm aware of, but
that's why I'm sending this...
[Example at bottom]
I have regional migration flows (?samples?) from, say, regions A to B, A
to C, B to A, ?., C to B (Noted as
2012 Jun 01
1
trouble with append() in a for loop
Hello all,
*
*
I'm having some difficulty, and I think the problem is with how I'm using
append() nested inside a for loop. The data are:
y,x
237537.61,873
5007.148438,227
17705.77306,400
12396.64369,427
228703.4021,1173
350181.9752,1538
59967.79376,630
140322.7774,710
42650.07251,630
5382.858702,264
34405.82429,637
92261.34614,980
144927.1713,1094
362998.7355,1420
203313.6442,1070
2017 May 31
2
stats::line() does not produce correct Tukey line when n mod 6 is 2 or 3
Le 31/05/2017 ? 17:30, Serguei Sokol a ?crit :
>
> More thorough reading revealed that I have overlooked this phrase in the
> line's doc: "left and right /thirds/ of the data" (emphasis is mine).
Oops. I have read the first ref returned by google and it happened to be
tibco's doc, not the R's one. The layout is very similar hence my mistake.
The latter does not
2008 Dec 22
0
Align legend title
Dear R developers,
I needed to align the title of legend for some of my plots. If there is interest to include
this into base R, bellow are the examples and the relevent diffs.
Regards, Gregor
x <- 1:10
y1 <- 1.5 * x
y2 <- 2.0 * x
y <- cbind(y1, y2)
source(file=url("http://gregor.gorjanc.googlepages.com/legend.R"))
matplot(x, y, type="l", lty=c(1, 2))
##
1998 Mar 26
0
S programming style & "missing(.)" [was "regarding bugs in barplot" on R-core]
[The part about S (S-plus and R being dialects of S) programming
(at the end) makes me cc'ing this to R-devel. MM]
On R-core,
>>>>> "Paul" == Paul Murrell <paul@stat.auckland.ac.nz> writes:
Paul> hi (i) the problem with the positioning of the legend in your
Paul> barplot example:
Paul>
2000 May 31
1
legend with multiple columns
I have made a minor hack to "legend" (in R 1.0.0, but I didn't notice
any changes to legend in the 1.0.1 NEWS) to allow the legend to be
formatted in multiple columns, or horizontally (number of columns <-
number of legend items). (I find this helpful when I have lots of legend
items and not a lot of vertical space to squeeze the legend into.)
(Another hack I've considered
2002 Mar 21
1
legend - bug with argument angle (PR#1404)
When legend() is used with the angle argument as follows, not only the
boxes beside the legend text, but also the whole legend box is filled
with shading lines.
I think this is not intended:
plot(1:10)
legend(8, 4, c("A", "B"), angle=c(10, 80), fill=NULL, density=20)
I'd suggest as a fix (legend.R of R-1.5.0):
25c25
< rect2 <- function(left, top, dx, dy,
2005 Nov 09
2
problem with Running Locfit
Dear R users,
i am using locfit package developed by loader in R software, my problem is that as i am doing independont forecast using locfit object , i am able to do independont forecast for more than one years simultaniously. But when i am doing one year forecast(single) this code is giving following error...
"Warning message:
'newdata' had 1 rows but variable(s) found have 24
2008 Aug 28
4
Help with shading a polygon below a segment of a curve (normal distribution)
Dear R users,
I still feel new to R so please apologize if I am doing something stupid
here. My use of the polygon() function produces a result that I cannot
comprehend: In a plot, I would like to shade the area below a normal
distribution. However, I do not want the entire area to be shaded, but
just the area on the right side of a vertical line that I draw through
the distribution (in
2008 Jul 27
1
Color of box frame in Legend (Was: Matrix barplot)
On Sun, 27 Jul 2008, S Ellison wrote:
> Looking at the legend() source the filled box line colour is hardcoded :
> if (mfill) {
> if (plot) {
> fill <- rep(fill, length.out = n.leg)
> rect2(left = xt, top = yt + ybox/2, dx = xbox, dy = ybox,
> col = fill, density = density, angle = angle,
> border =
2002 Aug 06
2
help with lagged scatterplot
Hi,
How do I can make a lagged scatterplot of two variables:
Yt (nao) versus Xt-h (mei)
if they have the following structure:
>series
mei nao
Jan 1950 -1.036 0.55
Feb 1950 -1.133 3.31
Mar 1950 -1.259 0.81
Apr 1950 -1.027 1.60
May 1950 -1.399 -1.73
Jun 1950 -1.366 1.26
Jul 1950 -1.300 -0.87
.
.
.
I've tried with lag.plot but I don't understanf how to use it
Thanks in