 | | | rhelp | | Dear R-help
I was trying to convert a date and time record extracted from a fortran
subroutine I worte and I encounter some problem. The data read in time
and date in a format like "2000-05-11_01 hi
when i was computing the variance of a simple vector i found unexpect
result. not sure whether it is a bug.
> var(c(1 2 3))
[1] 1 #which should be 2/3.
> var(c(1 2 3 4 5))
[1] 2.5 #which shouHello everybody
Could I consult you a question?
I am doing an analysis about some data. I used Anova analysis. Its PValue returned is about 0.275 no signal. But through the box-chart I think it eDear R users
I have a problem about catch the value from function.
I have following two functions (part)
sbolus1 <- function()
{
.......
for( i in 1 Subject) {
kel <-par1
Vd <-par2
Dear R-help
I am using R 2.1.1 on Windows XP.
I have a tab-delimited data file that has been exported by SAS. The file is reasonably big so I
apologise that I can 't give a good toy example. I do tDear R-helpers
New to R I 'm in the middle of a project that I 'm using to force me
learn R. I 'm running into some behavior that I don 't understand and
I need some advice. In the last week I 'vHenry Wolkowicz (google his page for lots of optimization references)
mentioned to me that that function is a standard example to show
that first order methods (e.g. steepest descent) can fail by repeDear R-help list members
I forgot to copy my reply to the r-help list. Here 's most of it.
John
GENERAL REFERENCE ON NONLINEAR OPTIMIZATION?
What are your favorite references on nonlinear optimization? I like
Bates and Watts (1988) Nonlinear Regression Analysis and Its
Applications (WileyHi John
Thanks a lot for the reply.
Could you suggest how I can correct this problem? I tried using a
correlation matrix instead of raw moments but still got the same error. I
also fixed parameterSay I have a FOR-loop for computing powers (just a trivial example)
for(i in 1 5)
{
x <-i^2
y <-i^3
}
How can I create a data.frame and a 3D plot of (i x(i) y(i)) i.e. for
each iteration
Thanks
SColleagues
I frequently insert PDF graphics created with R into Word (Office
2004 for Mac) documents. The documents are created on either a
Linux machine (RedHat 9) or a Mac (Tiger). I am usinHi All
I have conducted the following survival analysis which appears to be OK
(acknow. to AZ & PR for solving my earlier issues).
surv.mod1 <- survreg( Surv(timep1 relall6)~randgrpc data D1. That was a part of a private email exchange. It has
been suggested that more people may be interested.
2. I did use various databases (significant part of my
job) for the last 15 years. Some withHi
Can anyone if R has any package that will generate numbers from g-and-h and
GB2 distributions? These are distributions that are like normal distribution
but span more of the kurtosis and skewneDear R-helpers
I have just loaded the fSeries package and I wanted to run the example provided in the documentation of garchOxFit but I got the following
> library(fSeries)
> ?garchOxFitDear R-helper
I wish to implement the APARCH model as described in the fSeries documentation.
But I get the following
>library(fSeries)
[...]
> ?aparchFit
No documentation for 'aparchFHi group
I have a lot of images from R-plot after MCMC How can I save them
by file ?
Ping YAO
***********
[[alternative HTML version deleted]]
Holiday Letter
Holiday CD / Museum of Contemporary Art Donation / The Perfect Gift
art-exchange is primarily a patron of the visual arts however we are happy to support all of the arts. The Holidahello everybody
i want to use the maximum likelihood method to estimate FRECHET parameters of
my sample data.
Should it work with fitdistr in the package MASS?
I only find how to do it for GEV GumbI 've a vector of pairwise correlations in the order low-index element
precedes the high-index element say
corr(1 2) 0.1 corr(1 3) 0.2 corr(2 3) 0.3 corr(3 4) 0.4
How can I construct the corresphi netters
i have a dataframe A with several columns(variables). the elements of
column M are character strings. so
A$M c( "ab " "abc " "bcd " "ac " "abcd " "fg " ..... "fl ").
i wanna extract all the rowDear R users
I have a problem about catch the value from function.
I have following two functions (part)
fbolus1 <- function()
{.........
par <-data.frame(Parameter c( "kel " "Vd ") Initial c(0))
ch This message is in MIME format. The first part should be readable text
while the remaining parts are likely unreadable without MIME-aware tools.
---1903425009-1250725552-1133572590 15277
ConteDear Rand
unfortunately right now none of the R packages can compute Rocke 's
constrained M-estimator of scatter and location. I have implemented this
estimator as function covMTB in rrcov - see
httpHello
I am creating a 3D scatter plot with the cloud function. I ask it to
group my rows by a "Treatment " column (there are 4 different groups). I
need to know which points in the plot correspond toHello
I am interfacing R and C code using the function .Call.
Is there any way to print to file form C?
I.e. is there something analogous to
fopen(file1 "w ")
fprintf(file1 "%f " ... )
fc
Dear R user
My input data positive and negative is complete without missing data. After running ksmooth( ) I receive for $y many NAs. What could be the reasons and how can I receive Dear group
could some one help me how i can split a string into
pieces and access them.
For example
> test "this is a test "
> typeof(test)
[1] "character "
> strsplit(test split 'is ')
[[1]]
[1Hi
I am running R on my iBook (OS X 10.4) and whenever I try and plot a
model that has been run I get a grey background. This makes the plot
difficult to read on b&w printouts. I have tried ch |
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