Displaying 20 results from an estimated 10000 matches similar to: "Gaps in time series."
2001 Nov 12
5
how to counteract slowdown
Hello,
as far as I understood ext3 will more or less hog a machine when writing
away the journal. A customer is having a slowdown every 5 minues for about
30 seconds, the machine becomes more or less unusable.
This is an NFS server serving 300 Gigs spread over 2 NFS shares.
I'm wondering what would be the best course of action:
a) make the journal bigger?
b) make the journal smaller?
2011 Nov 26
3
Time series merge?
I have two time series
a <- ts(1:10, start=c(1,6), end=c(2,5), frequency=10)
b <- ts(1:5, start=c(2,1), end=c(2,5), frequency=10)
Obviously 'b' is a subset of 'a'. I want a single index value indicating
where that start of 'b' lines up with the start of 'a'. So in this simple
example I would expect an index of 5. I was playing with 'merge'.
2011 Oct 22
7
"Plotting" text?
I noticed that the text() command adds text to a plot. Is there a way to
either make the plot blank or add text to a "blank sheet". I would like
to "plot" a page that contains just text, no plot lines, labels, etc.
Suggestions?
Kevin
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2008 Oct 10
2
Leap year?
Given a Date object or simply a year is there an R function to tell me if the it is a leap year or not? I was hoping for something like 'is.leapyear'. I probably can build my own function (year divisible by 4 etc.) but I would rather use an existing function if it is available.
Thank you.
Kevin
2008 Aug 28
6
Function not returning a vector?
Why does:
(shape/scale) * (1:365/scale)^(shape - 1)
return a vector of numbers but calling a function
hasard(1:365,shape,scale)
defined like:
hazard <- function(x,shape,scale)
{
return (shape/scale) * (x/scale)^(shape - 1)
}
Only return a single value? It is like x becomes a single value passed as an argument.
Thank you.
Kevin
2013 Aug 26
2
If else loop problem: the condition has length > 1 and only the first element will be used
Hi all,
I'm running an if else loop to normalize my data to a known control.
I have calculated values that need to be subtracted from each treatment applied. I'm trying this within a for loop with if and else commands to apply to correct subtraction. This is done as follows:
attach(data.2013)
#Normalize to known control
for(i in signal2) {
if(t.tr=="Pst 24")
2009 Jan 03
5
Power functions?
I had a question about the basic power functions in R.
For example from the R console I enter:
-1 ^ 2
[1] -1
but also
-1^3
[1] -1
-0.1^2
[1] -0.01
Normally pow(-1, 2) return either -Infinity or NaN. Has R taken over the math functions? If so I would think that -1^2 is 1 not -1 and -0.1^2 is 0.01 not -0.01.
Thank you.
Kevin
2010 Mar 22
2
Factors attribute?
I noticed that when I fit a linear model using 'lm' there is an attribute called "factors" that is added to the "term". It doesn't seem to appear for 'model.matrix', just 'lm'. I have been unable to find where it gets constructed or what it means? It looks like a two dimensional array that I may be able to use so I would just like to get some
2011 Nov 07
3
Upgrade R?
I am trying to upgrade to R 2.14 from R 2.13.1 I have compied all the
libraries from the 'library' directory in my existing installation (2.13.1)
to the installed R 2.14. Now I want to uninstall the old installation (R
2.13.1) and I get the error:
Internal Error: Cannot find utCompiledCode record for this version of the
uninstaller.
Any ideas?
Kevin
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2019 Jan 14
4
Reducing the number of ptrtoint/inttoptrs that are generated by LLVM
Hello Chandler,
> First and foremost - how do you address correctness issues here? Because
the subtraction `A - B` can escape/capture more things. Specifically, if
one of `A` or `B` is escaped/captured, the
> subtraction can be used to escape or capture the other pointer. So *some*
of the conservative treatment is necessary. What is the plan to update all
the analyses to remain correct?
2009 Oct 28
5
PDF Corrupted?
I am running R 2.9.2 and creating a PDF that I am trying to open with Adobe Reader 9.2 but when I try to open it the reader responds with
"There was an error opening this document. The file is damaged and cannot be repaired.:
I am using the R command(s):
pdf(file="cat.pdf", title="Historical Sales By Category")
for(j in 1:length(master))
{
d <-
2009 Dec 04
2
[LLVMdev] Possible bug in ExpandShiftWithUnknownAmountBit
Hi Duncan,
I don't know if the optimization would help us much. Our architecture
performs integer shifts and subtractions at the same speed. I think the
optimization is limited to the case where NVBits is a power of two. That is
the case for all current value types but there's a separate thread where
someone is proposing adding i20 as a native type.
In your previous email you mentioned
2009 Dec 05
0
[LLVMdev] Possible bug in ExpandShiftWithUnknownAmountBit
Hi Javier,
> I don't know if the optimization would help us much. Our architecture
> performs integer shifts and subtractions at the same speed. I think the
> optimization is limited to the case where NVBits is a power of two.
it is irrelevant whether it is a power of two or not. Anyway, since you
are the only user, and this is not helpful for you, I guess we can forget
it :)
>
2009 Oct 27
3
Non-normal residuals.
Hello,
I asked a question about what the most likely process to follow if after a time-series fit is performed the residuals are found to be non-normal. One peron responded and offered to help if I supplied a sample data set. Unfortunately now that I have a sample I have lost the emai addressl. If you are that person or have some ideas please email me back at rkevinburton at charter.net.
Thank
2008 Aug 03
2
Determining model parameters
This may be a begining question. If so, please bear with me.
If I have some data that based on the historgram and other plots it "looks" like a beta distribution. Is there a function or functions within R to help me determine the model parameters for such a distirbution? Similarily for other "common" distirbutions, Poisson(lambda), Chi-Square(degrees of freedom, chi-square
2010 Jan 03
3
F77_CALL, F77_NAME definition
I give up. Maybe it is my search (Windows) but I cannot seem to find the definition of the F77_CALL or F77_NAME macros. Either there are too many matches or the search just doesn't find it. For example where is the source for:
F77_CALL(dpotri)
?
Thank you.
Kevin
2008 Jul 15
4
Iterations
I have a command that reads in some data:
x <- read.csv("Sales2007.dat", header=TRUE)
Then I try to organize the data:
sc <- split(x, list(x$Category, x$SubCategory), drop=TRUE)
Then I want to iterate through the data. I was able to get the following to run on the R console:
for(i in 1:length(sc))
{
sum(sc[[i]]$Quantity)
}
But notiing is primted on the console. I find
2008 Aug 29
1
Generating a time series.
I have a bunch of lists that are essentially time-series with the unit of time being 'day'. So I naturally want to generate a time-series from 1:365. I was wondering if there is a nifty 'R' trick to turn a list with missing data (the list may contain values at 100, 230, and 360) into a time series with the missing data filled in (with zeros).
Thank you.
Kevin
2019 Jan 14
7
Reducing the number of ptrtoint/inttoptrs that are generated by LLVM
Hello all,
This is a proposal for reducing # of ptrtoint/inttoptr casts which are not
written by programmers but rather generated by LLVM passes.
Currently the majority of ptrtoint/inttoptr casts are generated by LLVM;
when compiling SPEC 2017 with LLVM r348082 (Dec 2 2018) with -O3,
the output IR contains 22,771 inttoptr instructions. However, when
compiling it with -O0, there are only 1048
2008 Oct 07
4
sort a list?
I am trying to sort a list and the data is obiously not in the right format. I am trying:
x <- list()
x[["A"]] <- 1
x[["B"]] <- 2
order(x)
But am getting:
Error in order(x) : unimplemented type 'list' in 'orderVector1'
How should I change the list so that it can be sorted? What kinds of objects (classes of objects) can be sorted?
Thank you.
Kevin