Displaying 20 results from an estimated 8000 matches similar to: "x,y vs row,column"
1999 May 06
0
matrix weirdness
I am using R on unix version 63.0
I am doing an image plot of the following data file:
================================
lag1 lag2 cif2d
0.000 0.000 NaN
0.000 1.000 0.500000
0.000 2.000 0.489831
0.000 3.000 0.492986
0.000 4.000 0.493409
0.000 5.000 0.492727
0.000 6.000 0.494485
1.000 0.000 0.500000
1.000 1.000 NaN
1.000 2.000 0.495098
1.000 3.000 0.489831
1.000 4.000 0.492986
1.000 5.000
1999 May 06
0
image weirdness
I am using R 63.0.
Now let's try this simple image plot.
Here is the data file:
============================
lag1 lag2 cif2d
1 1 11
1 2 12
1 3 13
2 1 21
2 2 22
2 3 23
3 1 31
3 2 32
3 3 33
====================
data<-read.table("~/r/rt/data/unif/junk.out",header=TRUE)
x<-unique(data$lag1)
y<-unique(data$lag2)
z<-matrix(data$cif2d,length(y),length(x))
At this point, see
2013 Apr 26
1
Regression coefficients
Hi all,
I have run a ridge regression as follows:
reg=lm.ridge(final$l~final$lag1+final$lag2+final$g+final$g+final$u,
lambda=seq(0,10,0.01))
Then I enter :
select(reg) and it returns: modified HKB estimator is 19.3409
modified L-W estimator is 36.18617
smallest value of GCV at 10
I think it means that it is
2002 Jun 20
1
Possible bug with glm.nb and starting values (PR#1695)
Full_Name: Ben Cooper
Version: 1.5.0
OS: linux
Submission from: (NULL) (134.174.187.90)
The help page for glm.nb (in MASS package) says that it takes "Any other
arguments for the glm() function except family"
One such argument is start "starting values for the parameters in the linear
predictor."
However, when called with starting values glm.nb returns:
Error in
2012 Feb 03
1
A question on Unit Root Test using "urca" toolbox
Hello,
I have a question on unit root test with urca toolbox.
First, to run a unit root test with lags selected by BIC, I type:
> CPILD4UR<-ur.df(x1$CPILD4[5:nr1], type ="drift", lags=12, selectlags ="BIC")
> summary(CPILD4UR)
The results indicate that the optimal lags selected by BIC is 4.
Then I run the same unit root test with drift and 4 lags:
2013 Apr 27
1
Selecting ridge regression coefficients for minimum GCV
Hi all,
I have run a ridge regression as follows:
reg=lm.ridge(final$l~final$lag1+final$lag2+final$g+final$u,
lambda=seq(0,10,0.01))
Then I enter :
select(reg) and it returns: modified HKB estimator is 19.3409
modified L-W estimator is 36.18617
smallest value of GCV at 10
I think it means that it is advisable to
2008 May 22
1
How to account for autoregressive terms?
Hi,
how to estimate a the following model in R:
y(t)=beta0+beta1*x1(t)+beta2*x2(t)+...+beta5*x5(t)+beta6*y(t-1)+beta7*y(t-2)+beta8*y(t-3)
1) using "lm" :
dates <- as.Date(data.df[,1])
selection<-which(dates>=as.Date("1986-1-1") & dates<=as.Date("2007-12-31"))
dep <- ts(data.df[selection,c("dep")])
indep.ret1
2013 Apr 30
0
Ridge regression
Hi all,
I have run a ridge regression on a data set 'final' as follows:
reg=lm.ridge(final$l~final$lag1+final$lag2+final$g+final$u,
lambda=seq(0,10,0.01))
Then I enter :
select(reg) and it returns: modified HKB estimator is 19.3409
modified L-W estimator is 36.18617
smallest value of GCV at 10
I think it
2012 Dec 03
2
How to rename the columns of as.table
Hello guys .. I would like to have some help about as.table .
I made a table with the autocorrelations of the returns whit 10 lags and i
get this :
autocorrelazione2 <- as.table(c((cor(r2[-1151,],lag(r2))),(cor(r2[-
c(1151,1150),],lag(r2, k=2))),(cor(r2[- c(1151,1150,1149),],lag(r2,
k=3))),(cor(r2[- c(1151,1150,1149,1148),],lag(r2, k=4))),(cor(r2[-
c(1151,1150,1149,1148,1147),],lag(r2,
2012 Mar 19
1
Lag based on Date objects with non-consecutive values
Hello all,
I need to figure out a way to lag a variable in by a number of days
without using the zoo package. I need to use a remote R connection
that doesn't have the zoo package installed and is unwilling to do so.
So that is, I want a function where I can specify the number of days
to lag a variable against a Date formatted column. That is relatively
easy to do. The problem arises when I
2023 Jan 16
1
(no subject)
Dear Members,
Greetings! I would like to know how to create the lag variable for my data.
# Load data and create time series object ----
oil <- read_xlsx("crudefinal.xlsx")
pricet=ts(oil$price, start = c(2020, 22), frequency = 365)
roilt=ts(diff(log(oil$price))*100,start=c(2020,22),freq=365)
# Fit MSW model ----
roilt.lag0 =
2017 Jun 23
0
R version 3.3.2, Windows 10: Applying a function to each possible pair of rows from two different data-frames
You appear to be trying to write C code in R. Don't do this. If you
can trade off space for efficiency, the calculation can be easily
vectorized (assuming I correctly understand what you want to do, of
course).
set.seed(135) ## for reproducibility
D1<-data.frame(x=1:5,y=6:10,z=rnorm(5))
D2<-data.frame(x=19:30,y=41:52,z=rnorm(12))
D.all <-merge(D1,D2, by.x=NULL,by.y=NULL) ##
2009 Nov 21
1
How to make a cartesian pairlist from a vector?
Hi,
I'm looking for a function that will take a list of columns or data.frame
and corvert it to cartesian pairlist. For example for this data.frame (see
below), I'd like to get a list of all possible pairs:
> sound
cs rs ns
7 5 2
4 5 4
6 3 1
8 4 1
6 4 2
6 7 1
2 2 5
9 2 5
how can I get this?
> mylist
((cs,rs), (cs,ns), (rs,ns))
2012 Dec 31
2
code to convert 3D geographical coordinates to Cartesian?
Is there packaged code to convert geographical coordinates (e.g.,
longitude, latitude, elevation) to Cartesian coordinates in 3-space?
I can see how to do this using
1. a spherical-to-Cartesian conversion like pracma::sph2cart(tpr)
http://cran.r-project.org/web/packages/pracma/
2. a geographical-to-spherical conversion. This seems to involve (in
roughly increasing order of difficulty or
2010 Aug 18
1
Plot in cartesian plane
Hi all,
I'm trying to plot this two curves in a single cartesian plane, but when I
plot the first one, the plot appears with no negative "y" value. When I plot
the second curve, it almost does not apear in the graph.
I was trying the plot.window but with no success.
Can someone help me with this?
If possible, I'd like to plot this curves in a perfect cartesian plane.
f =
2017 Jun 25
2
Writing my 3D plot function
Hi all,I had a question last week on asking for a function that will help me draw three different circles on x,y,z axis based on polar coordinates (Each X,Y,Z circle are coming from three independent measurements of 1-360 polar coordinates). It turned out that there ?is no such function in R and thus I am trying to write my own piece of code that hopefully I will be able to share. I have spent
2011 Apr 08
1
asking about contour plot with R
I'm working in Rosario, Argentina, trying to plot some contours.
I found the function "draw.contour" created by James Forester at
R-bloggers. If you take a look at that function you'll see it's very
useful!
But I have a problem with it and James is trying to help me (but also
asked me to seek for more help) I hope you can help me (don't worry if you
can't):
Using
2017 Jun 25
0
Writing my 3D plot function
Please look at what I see in your code below (run-on code mush) to understand part of why it is important for you to send your email as plain text as the Posting Guide indicates. You might find [1] helpful.
[1] https://wiki.openstack.org/wiki/MailingListEtiquette
--
Sent from my phone. Please excuse my brevity.
On June 25, 2017 2:42:26 PM EDT, Alaios via R-help <r-help at r-project.org>
2004 Sep 10
1
Efficient Cartesian product of data.frames
Hello List,
I am looking for efficient code to produce the Cartesian product of two
or more data.frames. I'd like to be able to do this without resorting to
looping. I have searched the FAQ, web, etc without luck. That being
said, the help page for merge says that the function can produce what
I'm looking for if the by vectors are of zero length. Would someone be
so kind as to
2008 Apr 12
3
Matrix Indexing
Hi
Does anyone know how I might pick out diagonal elements of a matrix using a
vector?
If I create a matrix a:
a <- matrix(c(1:16), 4, byrow=TRUE)
and I want to pick out the elements (1,1),(2,2),(3,3), or another arbitrary
diagonal (upper or lower), is there any way I can use a vector to do this?
So if I want a diagonal of size 3, I could create a vector like x <- c(0:2)
and then pick