Displaying 20 results from an estimated 300 matches similar to: "Lag based on Date objects with non-consecutive values"
2010 Jun 01
1
loop
Can any one help it will be very kind, loop statements
I have this table and some more records, I want to reshape it
V1 V2 V3 V4 V5 V6 V7 V8 V9 V10
TP53 Dis1 Dis2 Dis3 Dis4 Dis5 Dis6
DCI New1 New2 New3 New4
FDI Hi2 H3 H4
GHD I1 I3 I4 I5 I6 I7 I8
I want my new table or matrix to be some thing like this
V1 V2 V3
Tp53 Dis1 Dis2
Tp53 Dis1 Dis3
Tp53 Dis1 Dis4
Tp53 Dis1 Dis5
Tp53 Dis1 Dis6
Tp53 Dis2
2010 Jun 08
2
constructing a contingency table (ftable, table)
Dear all,
an hopefully quick table question.
I have the following data:
Two objects that are 2*9 matrix with nine column names (Dis1, ...,
Dis9) and the row names (2010,2020). The content are frequencies
(numeric).
In want to create a table that is along the lines of
ftable(UCBAdmissions) and should looks like this:
Dis1 | ...| Dis9
2010|2020|....|2010|2020
(first row,first column is the value
2001 Jun 12
1
cophenetic matrix
Hello,
I analyse some free-sorting data so I use hierarchical
clustering.
I want to compare my proximity matrix with the tree
representation to evalute the fitting. (stress, cophenetic correlation
(pearson's correlation)...)
"The cophenetic similarity of two objects a and b is defined as the
similarity level at wich objects a and b become members of the same
cluster during the course of
2000 Apr 21
1
SAMBA Browse Lists Sync DMB and LMB
Hello !
I have a problem of syncing browse lists between
DMB and LMB.
The topology of ours network is as follows:
Linux Network
comma(Linux, DMB, WINS) vol(Linux) door(Linux, LMB)
| | | | | | |
| | --------------(195.226.226.16/28)------ | |
| | | |
| --(local net
2007 Jul 16
0
FW: summary statistics for groups
Kirsten,
this may not be the most elegant approach, but I think I would create
dummy variables on the fly for each disease code you have, then use the
"with" function to get means.
Give this a try:
# setup some fake data as an example
icd9 <- c(rep("dis1",4), rep("dis2",5), rep("dis3",3))
n <- length(icd9)
exposure <- rnorm(n)
working <-
2008 Aug 11
3
Peoblem with nls and try
Hello,
I can`t figure out how can increase the velocity of the fitting data by nls.
I have a long data .csv
I want to read evry time the first colunm to the other colunm and analisy with thata tools
setwd("C:/dati")
a<-read.table("Normalizzazione.csv", sep=",", dec=".", header=F)
for (i in 1:dim(a[[2]]]) {
#preparazione dati da analizzare
2011 Nov 30
2
forecasting linear regression from lagged variable
I'm currently working with some time series data with the xts package, and
would like to generate a forecast 12 periods into the future. There are
limited observations, so I am unable to use an ARIMA model for the forecast.
Here's the regression setup, after converting everything from zoo objects to
vectors.
hire.total.lag1 <- lag(hire.total, lag=-1, na.pad=TRUE)
lm.model <-
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
2008 Jan 17
1
acf lag1 value
Hi R,
I have doubt.
>x= c(4,5,6,3,2,4,5)
>acf(x,plot=F,lag.max=1)
Autocorrelations of series 'x', by lag
0 1
1.000 0.182
But if I actually calculate the autocorrelation at lag1 I get,
>cor(x[-1],x[-length(x)])
[1] 0.1921538
Even in excel I get 0.1921538 value. So, I want to know what the 'acf'
function is calculating here....
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
2018 Mar 25
3
Take average of previous weeks
Dear all,
I have weekly data by city (variable citycode). I would like to take the
average of the previous two, three, four weeks (without the current week)
of the variable called value.
This is what I have tried to compute the average of the two previous weeks;
df = df %>%
mutate(value.lag1 = lag(value, n = 1)) %>%
mutate(value .2.previous = rollapply(data = value.lag1,
2004 Oct 29
2
lag variable addition to data frame question
Hi,
I was wondering if there is a more efficient way of handling the following method of creating a lagged value in a data frame without using the recursive
'for(i in 1:n)' loop and without using as.ts
#Steps to creating a lag variable in a data frame 'my.dat.fr'
# with 275 columns, 2400 rows of numbers and factors . The #variable x is a factor of #with five different levels
the
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,
2005 Aug 13
1
How to make a lagged variable in panel data?
Suppose we observe N individuals, for each of which we have a
time-series. How do we correctly create a lagged value of the
time-series variable?
As an example, suppose I create:
A <- data.frame(year=rep(c(1980:1984),3),
person= factor(sort(rep(1:3,5))),
wage=c(rnorm(15)))
> A
year person wage
1 1980 1 0.17923212
2 1981
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
2018 Mar 25
0
Take average of previous weeks
I am sure that this sort of thing has been asked and answered before,
so in case my suggestions don't work for you, just search the archives
a bit more.
I am also sure that it can be handled directly by numerous functions
in numerous packages, e.g. via time series methods or by calculating
running means of suitably shifted series.
However, as it seems to be a straightforward task, I'll
2018 Mar 26
1
Take average of previous weeks
Dear Bert,
Thank you very much.This works. I was wondering if the fact that I want to
create new variables (sorry for not stating that fact) makes any
difference? Thank you again.
Sincerely,
Milu
On Sun, Mar 25, 2018 at 10:05 PM, Bert Gunter <bgunter.4567 at gmail.com>
wrote:
> I am sure that this sort of thing has been asked and answered before,
> so in case my suggestions
2012 Dec 17
1
subset handling
Dear Rui and UseRs,[a text file has also been attached, in case the format of my email is difficult to get]I am extremely sorry that I am bothering you once again, but I?ll have to get to the bottom of it. The following command
sp <- lapply(split(agg, agg$st), function(x) x[order(x$year, x$month), ])
gave me an output with monthly mean of population(as under). i am not able to apply