Displaying 8 results from an estimated 8 matches for "ntsg".
Did you mean:
nts
2012 Oct 11
1
Problems with getURL (RCurl) to obtain list files of an ftp directory
...16 (ET, DSI)
products, and then to download them. (part of the script by Tomislav
Hengl, spatial-analyst). Instead of the list of files (from ftp), I am
getting the complete html code. Anyone knows why this might happen?
This are the steps i have been doing:
> MOD16A2.doy<- '
ftp://ftp.ntsg.umt.edu/pub/MODIS/Mirror/MOD16/MOD16A2.105_MERRAGMAO/'
> items <- strsplit(getURL(MOD16A2.doy,
.opts=curlOptions(ftplistonly=TRUE)), "\n")[[1]]
>items #results
[1] "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"
http://www.w3.org...
2011 May 18
1
How to make array of regression objects
Dear all,
I have made couple logistic regressions, what making a distribution of some
event.
Currently, i store it like this:
o1 <- lrm(...)
o2 <- lrm(...)
o3 <- lrm(...)
...
Then, i have made a function to peak required regression object from this
variables by it number:
get_object <- function(obj_name, nModel) {
eval (parse(text=paste("o <- ", obj_name, nModel,
2011 Mar 04
2
How to copy data from data.frame to matrix
Hello
I'm a new in R
I have a large data.frame "s" (this is actualy just a table in mysql) :
> names(s)
[1] "symbols", "day", "value"
I need to convert it to simple matrix. I have define this matrix like this:
> data.matrix <- matrix(nrow=nDays, ncol=nSymbols, dimnames=list(days,
symbols))
then i just copy values to the matrix using for()
2011 Aug 19
0
question about mixtools package
Hello all,
May be silly question, but what exactly is beta parameter in functions like
regmixEM from mixtools package?
I mean, how to determine this beta, if i have a set of metrics for each
case? Is there a function for that? I have try to put NULL at this
parameter, but function just do not work in this case.
Cheers,
Dima
[[alternative HTML version deleted]]
2010 Mar 04
0
Conditional Logistic Regression in R
Hello.
I want to use conditional logistic regression to calculate the probability
of winning one of three players in golf. I was able to calculate these
probabilities in Stata10, and I now want to transfer the code in the R
Project, because it is can get data directly form MySQL. Unfortunately, I'm
novice in R and I can't calculate the probability using the predict function
when trying to
2010 Jun 29
2
Matrix operations
Hello
I have a quick question.
I need to compute matrix in R, like A <- t(X) %*% solve(V) %*% X, where X is
a vector and V is a matrix
This code works, but now i want to optimize it. I have try:
A <- crossprod(X, solve(V)) %*% X
Is there another, better way?
WBR
Dima
[[alternative HTML version deleted]]
2010 Sep 28
1
How to convert SEXP to double
Hello All,
A simple question.
I get some return from the R in my C++ program (via Rcpp package). The
result come, as SEXP and it should be a simple numeric variable.
How to convert it to double?
The code, what i use:
stringstream ss;
ss << "p <- predict(fit_ar11, n.ahead = 2, doplot=FALSE);"
<< "p$pred[1]";
SEXP ans;
int iRet =
2010 Apr 27
2
How to work out 3-way probabilities
Hello.
I have a quick question.
I try to use logit regression, to work out probabilities in the sport event.
I have work out probabilities for group of 2 players:
p1 - probability, what player1 will beat player2
p2 - probability, what player2 will beat player1
pt - tie probability, p1 <- 1 - p1 - p2;
Now i want to work out probabilities for group of 3 players, like:
pg1 - probability, what