Dear All,
I am on WindowsXP with 512 MB of RAM, R 2.4.0, and I want to read in a
big file mln100.txt. The file is 390MB big, it contains a column of 100
millions integers.
> mln100=scan("mln100.txt")
Error: cannot allocate vector of size 512000 Kb
In addition: Warning messages:
1: Reached total
Hello,
Could someone help me to explain the VERY big difference in applying two
tests on multivariate normality:
library(mvnormtest)
data(EuStockMarkets)
mshapiro.test(t(EuStockMarkets[15:29,1:4]))
Shapiro-Wilk normality test
data: Z
W = 0.8161, p-value = 0.005955
and
library(energy
Hello,
I want to test if the Weibull distribution is appropriate for the
failure time. When trying to reproduce an example from MASS (the book,
Ch. 13.2), I type
library(survival)
library(MASS)
leuk.wei <- survreg( Surv(time)~ag+log(wbc),data=leuk)
ntimes <- leuk$time*exp(-leuk.wei$linear.predict
Dear All,
There is an example for the priceIts function (the its package) which
does not work for me as expected.
> ?priceIts
> x1 <- priceIts(instrument = c("^ftse"), start = "1998-01-01",
+ quote = "Close")
Error in validObject(.Object) : invalid class "its" object:
Dear All,
A very simple question:
> library(survival)
> fit <- coxph(Surv(time, status) ~ x, data=aml)
> survfit(fit)
Call: survfit.coxph(object = fit)
n events median 0.95LCL 0.95UCL
23 18 30 18 45
I believe I know what is median here, but how to extract i
I use the following two function for a lagged regression:
lm.lag=function(y,lag=1)
summary(lm(embed(y,lag+1)[,1]~embed(y,lag+1)[,2:(lag+1)]))
lm.lag.x=function(y,x,lag=1)
summary(lm(embed(y,lag+1)[,1]~embed(x,lag+1)[,2:(lag+1)]))
for, respectively,
y_t=a+b_1*y_t-1+...+b_lag*y_t-lag
y_t=a+b_1*
If you define Pareto density as p(x)=c*x^(-(c+1)) for x>1, then
dpareto <- function(x,c){
if(c<=0)stop("c must be positive") # Diagnostic step
ifelse(x<1,0,c/x^(c+1))}
ppareto <- function(q,c){
if(c<=0)stop("c must be positive > 0")
ifelse(q<1,0,1-1/q^c)}
qpareto <- function(p,c){
if(c<=0) stop
Dear all,
I met with some problems when dealing with a time series with serial correlation.
FIRST, I generate a series with correlated errors
set.seed(1)
x=1:50
y=x+arima.sim(n = 50, list(ar = c(0.47)))
SECOND, I estimate three constants (a, b and rho) in the model Y=a+b*X+u, where
u=rho*u(-1
Dear All,
R 1.9.1, Windows
When copying and pasting a few lines from the 'predict.Arima' help, I
get an error message:
> data(lh)
> predict(arima(lh, order = c(3,0,0)), n.ahead = 12)
Error in eval(expr, envir, enclos) : Object "xreg" not found
On the other hand, the following is OK:
> data(lh)
Dear all,
Sometimes, during an R session, my computer hangs and I
loose all the objects created during this session.
Is there a way to automatically type save.image() and
savehistory() every 5 minutes?
Best regards,
Remigijus
__
[EMAIL PROTECTED] maili
Sunday, March 02, 2003, 9:48:26 PM, you wrote:
MK> [EMAIL PROTECTED] wrote:
>> You are not solving the same problem, which is more than a little `odd'.
MK> Why?
MK> >>> want to choose the three parameters so that
MK> these three integrals are as close to, resp., 2300, 4600 and 5800 as
MK> possi
Dear all,
I have a function MYFUN which depends on 3 positive parameters TETA[1],
TETA[2], and TETA[3]; x belongs to [0,1].
I integrate the function over [0,0.1], [0.1,0.2] and
[0.2,0.3] and want to choose the three parameters so that
these three integrals are as close to, resp., 2300, 4600 and 58
12:09:33 PM, you wrote:
PDB> Remigijus Lapinskas <[EMAIL PROTECTED]> writes:
>> Dear all,
>>
>> I have two vectors and connect the points by line segments:
>>
>> x <- c(1990,1994,1995,1997)
>> y <- c(30,40,80,20)
>> plot(x,y,type="l&
Dear all,
I have two vectors and connect the points by line segments:
x <- c(1990,1994,1995,1997)
y <- c(30,40,80,20)
plot(x,y,type="l")
I want to get the values of y's on these lines at missing x's,
i.e., at 1991,1992,1993,and 1996. Is there a simple way to do this?
Best regards,
Remigijus
Try the H. Bengtsson's function plot.histogram from
http://www.maths.lth.se/matstat/staff/hb/mypackages/R/plot.histogram.R
Remigijus
Saturday, January 25, 2003, 10:21:30 PM, you wrote:
FHFPdR>Hi, I am having some trouble trying to plot a histogram in more than one
FHFPdR> colour. What I wan
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