Displaying 20 results from an estimated 7000 matches similar to: "Help with a problem"
2006 Jul 20
3
How do I modify an exported function in a locked environment?
Running R.app on Mac OS X 10.4
> version
_
platform powerpc-apple-darwin8.6.0
arch powerpc
os darwin8.6.0
system powerpc, darwin8.6.0
status
major 2
minor 3.1
year 2006
2006 Jul 20
3
How do I modify an exported function in a locked environment?
Running R.app on Mac OS X 10.4
> version
_
platform powerpc-apple-darwin8.6.0
arch powerpc
os darwin8.6.0
system powerpc, darwin8.6.0
status
major 2
minor 3.1
year 2006
2008 Jul 09
2
rollmean()
Hello,
I am trying to calculate a 31 day running mean in some temperature data
along ROWS. Rollmean() works great along columns, but how do I perform this
same action on my rows?
The data is a matrix of 365 columns (days of the year) by 5,000 rows
(lat/long coordinates).
I would like to perform a 31 day running mean along the 365 days.
I am new to R so any help would be greatly appreciated!
2008 Jan 07
5
moving or running average
Hi all R users,
Can anyone please let me know how to do the moving average with R?
With regards,
Abu
_________________________________________________________________
Free games, great prizes - get gaming at Gamesbox.
2008 Feb 13
4
rolling sum (like in Rmetrics package)
Hello, I'm new to R and would like to know how to create a vector of "rolling
sums". (I have seen the Rmetrics package and the rollMean function and I
would like to do the same thing except Sum instead of Mean.) I imagine
someone has done this, I just can't find it anywhere.
Example:
x <- somevector #where x is 'n' entries long
#what I would like to do is:
x1
2010 Jan 02
1
Question on Reduce + rollmean
Hello useRs,
I'd like to perform a moving average on the dataset, xx. I've tried
combining the functions Reduce and rollmean but it didn't work.
> r <- function(n) rollmean(n, 2) # where 2 = averaging interval
> output < - Reduce("r", x)
Error in f(init, x[[i]]) : unused argument(s) (x[[i]])
Is there anything wrong with the code in the first place?
where
2012 Mar 03
4
Sliding a Window in R
Dear all,
I am having a vector of around 300.000 elements and I Want to slide fast a window from the first element until the last-Windowsize
what I have so far is the following for statement:
for (i in 1:(length(data[,1]) - windowSize)) {
out[i] <- mean(data[i:(i + windowSize - 1), ])
elements[i]<-length(i:(i + windowSize - 1))
}
but this of course takes ages to
2009 Dec 10
1
Moving Averages in ggplot2
Hello all,
Have some time series data stored in a data.frame, and am plotting it with
ggplot2 (which is totally awesome). I have explored the documentation and
mailing list archives, and I can't see any way to plot a 'smoother' that is
just the K-step moving average.
For example, imagine I had a data.frame called 'sleep' with 'date' as the
date (from as.Date()) and
2012 Sep 26
2
non-differentiable evaluation points in nlminb(), follow-up of PR#15052
This is a follow-up question for PR#15052
<http://bugs.r-project.org/bugzilla3/show_bug.cgi?id=15052>
There is another thing I would like to discuss wrt how nlminb() should
proceed with NAs. The question is: What would be a successful way to
deal with an evaluation point of the objective function where the
gradient and the hessian are not well defined?
If the gradient and the hessian both
2008 Jul 21
4
how to speed up this for loop?
Could anyone tell me a better way to achieve the output of this for loop? It
seems to run quite slow. I'm sure there must be a more consise way to sum
from FN to LN, excluding positive values, for each row.
#sum between FN and LN, excluding positive values
for(i in 1:R){
for(j in FN[i]:LN[i]){
if(Temp[i,j]<0)
sum[i] <- sum[i] + sum(Temp[i,j])}}
Cheers,
R
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2010 Aug 20
3
rollmean help (or similar function)
I am working on a simple pilot project comparing the capability of SQL,
SAS and R to perform a rolling mean per the following instructions. I
have completed the SQL and SAS analysis, so now it's R's turn.
Calculate mean values of x (x=count) for each date in the dataset where
mean = the average count of days [t-9] through day [t-3] for each
date/illness combination.
Dataset aggpilot
2012 Oct 15
2
base64 within module
I have to convert a string in base64 before placing it inside a template
with puppet.
Is there a function available and how?
Thanks
Luca
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2010 Mar 12
2
Question regarding to maxNR
Hi R-users,
Recently, I use maxNR function to find maximizer. I have error appears as follows
Error in maxNRCompute(fn = fn, grad = grad, hess = hess, start = start, :
NA in the initial gradient
My code is
mu=2
s=1
n=300
library(maxLik)
set.seed(1004)
x<-rcauchy(n,mu,s)
loglik<-function(mu)
{
log(prod(dcauchy(x,mu,s)))
}
maxNR(loglik,start=median(x))$estimate
Does anyone know how
2005 May 27
2
nlminb to optmin
Hi!
I want to convert S-Plus 6.2 code to R 2.1.0. Instead of the function nlminb I use the function optmin
optmin(start,fn,gr,method="L-BFGS-B", lower, upper, hess,...)
But then I get the Error in optmin ...: L-BFGS-B needs finite values of fn
Then I used optmin(start,fn,gr,method="BFGS", hess, ...)
But then I get the Error in optmin ...: initial value in vmmin is not
2003 Sep 28
6
NAT/SIP solution?
Greetings,
I was wondering if somebody is working on a solution to the NAT/SIP-issues?
It seems to me that the problem has been identified, is that correct?
Just hoping that someone with more skills will provide us with a solution
sooner or later...
Regards,
Stig
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2010 Jan 04
3
Extract vector elements until cumsum <= x
Hi All,
I have a vector n, and for each n[i] I want to extract n[i], n[i+1],
n[i+2]..., until the cumulative sum of n[i] and subsequent elements exceeds
a CheckValue, whereupon I move to the next index and repeat.
I am trying to find a Vectorized approach, and have seen similar posts where
filter{stat} and rollmean{zoo} were suggested, but, I haven't been able to
figure a way to use them
2011 Jun 25
1
Moving average in a data table
Hi,
I'm trying to figure out common approach on calculating MA on a dataset
that contains column "time".
After digging around, I believe functions rollmean and rollaply should
be used.
However I don't quite understand the requirements for the underlying data.
Should it be zoo object type? Formatted in a special way?
As an example, I'm looking to get calculated
2005 Aug 01
4
test message - ignore me
Haven't seen email since the 29th.. just testing.
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2008 Jul 22
1
rollmean and stl
I need to investigate how rollmean and the trend returned from stl differ.
I am trying to find out exactly what the trend part of stl is (I have just
started coding in R and do not know fortran). I need to extract this
because it will be used in further calculations, and it needs to be verified
to make sure that I am using the right process. I would like to use this
to remove the seasonal
2018 Mar 20
0
Struggling to compute marginal effects !
In that case, I can't work out why the first model fails but not the
second. I would start looking at "Data" to see what it contains. if:
object2 <- polr(Inc ~ Training ,Data,Hess = T,method = "logistic" )
works, the problem may be with the "Adopt" variable.
Jim
On Tue, Mar 20, 2018 at 10:55 AM, Willy Byamungu
<wmulimbi at email.uark.edu> wrote:
>