Displaying 20 results from an estimated 700 matches similar to: "Semi-Regular Time Series with Missing Values"
2007 Aug 02
1
Using 'diff' on zoo vs zooreg classes (possible bug?)
Hello,
Can anyone explain the following behaviour? To me it seems a bug, but maybe
it is intentional.
It seems that a diff on a zooreg class that is not _strictly_ regular only
considers those entries that are 'deltat' apart.
In the following, diff on the zooreg class only returns values where the
index was one second apart. The example replicates by dev code, but I've
also tested
2011 Sep 12
5
Hourly data with zoo
I have date data as a numeric and hourly data in 0 to 2300 hours in a dataframe.
d <- rep(20110101,24)
h <- seq(from = 0, to = 2300, by = 100)
df <- data.frame(LST_DATE = d, LST_TIME = h, data = rnorm(24, 0, 1))
S <- chron(dates. = as.character(df$LST_DATE), times. =
paste(as.character(df$LST_TIME/100), ":0:0", sep = ""),
format =
2013 Jul 03
1
curl and CVE-2013-2174
Dear members,
It may sound a silly question. I have curl installed:
# pkg_info |grep curl
curl-7.24.0_3 Non-interactive tool to get files from FTP, GOPHER, HTTP(S)
Today portsnap updated the ftp/curl port, and patch-CVE-2013-2174 appeared
in files/, but the port version remained such that portaudit, and
portupgrade still complain about curl's version. What is the recommended
way to
2007 Apr 16
1
colSum() in Matrix objects
Hi,
I'd like to simply add column-wise using Matrix objects (Csparse).
It looks like one can apply mosty any base function to these objects
(i.e., apply, colSums), but there is a nasty conversion to traditional
matrix objects if one does that.
Is there any workaround? I can see colSum listed in the help for Class
'CsparseMatrix' , but I wonder whether I'm using the default
2013 Feb 05
2
duplicate data
Hello,
I have a long list of x-, y- and z-data and try to generate a heatmap.
Obviously there are several data with identical x- and y-values. I get
the following error message:
Error in interp.old(x, y, z, xo = xo, yo = yo, ncp = 0, extrap = extrap, :
duplicate data points: need to set 'duplicate = ..'
Unfortunately there seems no help screen on "duplicate". I'd prefer
2012 Dec 04
1
Periodicity of Weekly Zoo
Hi List,
I have weekly sales observations for several products drawn via ODBC.
Source data is available at
https://www.dropbox.com/s/78vxae5ic8tnutf/asr.csv.
This is retail sales data, so will contain seasonality and trend
information. I expect to see 52 or 53 observations per year, each
observation occuring on the same day of the week (Saturday). Ultimately
I'm looking to feed these series
2011 Mar 17
2
changing the dimensions of a matrix in a real specific way
Hi again,
I'd like to ask you a question again.
I have a matrix like this:
a <-matrix(c(1,2,3,4,5,6,7,8,9,10,11,12))
a
[,1]
[1,] 1
[2,] 2
[3,] 3
[4,] 4
[5,] 5
[6,] 6
[7,] 7
[8,] 8
[9,] 9
[10,] 10
[11,] 11
[12,] 12
Is there a proper way to change the dimensions of this matrix so that I'll get this as a result:
[,1] [,2] [,3]
[1,]
2011 Mar 08
1
creating additional column
Hello everybody,
I have a little problem in good old R. It is basically the following.
I have this small database with 3 rows and the following columns:
d1,
d2,
d3 and
Highest d value - which selects the highest value from d1, d2, d3 in each row.
d1 d2 d3 Highest d value
1 51.398426 39.111721 11.6086220 51.398426
2 4.057801
2011 Feb 10
3
help - "the condition has length > 1 and only the first element will be used"
Hello there,
I don't know if I'm addressing my question to the right e-mail address, I hope I do. Actually I have a little problem concerning writing a code in R. I try to briefly sum up my problem.
As you can see below, I created the functions "Equation1" and "Equation2" with some conditions.
Equation1 <-function(x){
if
2007 Jul 31
1
A complicated 'aggregate'
Hi,
I have a financial (zoo) time series with prices and volumes (although I can
get the coredata as a matrix). Due to the data-source some indices have
multiple observations. I want to aggregate these according to a weighted
average.
11:00:01 34 1000
11:00:01 35 500
11:00:01 35 1000
11:00:02 34 500
11:00:02 35 500
should become
11:00:01 34.6 2500
11:00:02 34.5 1000
I currently do this
2011 Mar 01
2
bootstrap resampling question
Hello there,
I have a problem concerning bootstrapping in R - especially focusing on the resampling part of it. I try to sum it up in a simplified way so that I would not confuse anybody.
I have a small database consisting of 20 observations (basically numbers from 1 to 20, I mean: 1, 2, 3, 4, 5, ... 18, 19, 20).
I would like to resample this database many times for the bootstrap process with
2011 Mar 21
1
recalling different data frames (the way you do in Excel VB)
Hello everyone,
I'd like to ask you a question again, basically focusing on referring to different objects.
Let's suppose we create the following databases this way:
id <-c(1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3,3,3)
a <-c(3,1,3,3,1,3,3,3,3,1,3,2,1,2,1,3,3,2,1,1,1,3,1,3,3,3,2,1,1,3)
b <-c(3,2,1,1,1,1,1,1,1,1,1,2,1,3,2,1,1,1,2,1,3,1,2,2,1,3,3,2,3,2)
c
2015 Apr 11
2
[LLVMdev] __eh_frame info changes in Clang?
Nick,
Do you happen to know why the version reported in 'dwarfdump
--eh-frame' for object files now differs when compiled with and
without -g? The test used in FSF gcc's configure produces a diff of..
% diff -u conftest.o.g.stripped.dwarfdump conftest.o.g0.stripped.dwarfdump
--- conftest.o.g.stripped.dwarfdump 2015-04-10 21:43:15.000000000 -0400
+++
2006 Sep 09
2
cygwin ssh goes heavy cpu uasage
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
I noticed that if I install cygwin ssh on a laptop , the cpu usage goes
to 80-90% when not all the network adaptors are connected.
how may I assist in reporting this bug better? can some one pls point me
to a version compilied with the debug flag? how can I use gdb on windows
to report this?
Niv
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.5
2001 Dec 29
2
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2011 Mar 21
1
recalling different data frames (the way you do in Excel VB but now) in
Hello everyone,
I'd like to ask you a question again, basically focusing on referring to different objects.
Let's suppose we create the following databases this way:
id <-c(1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3,3,3)
a <-c(3,1,3,3,1,3,3,3,3,1,3,2,1,2,1,3,3,2,1,1,1,3,1,3,3,3,2,1,1,3)
b <-c(3,2,1,1,1,1,1,1,1,1,1,2,1,3,2,1,1,1,2,1,3,1,2,2,1,3,3,2,3,2)
c
2011 Mar 11
1
changing one character in the name of dataframes repeatedly
Dear R-community,
I'd like to ask you a question concerning R again. I try to keep this simple because I am not willing to confuse you at all.
I have a little data frame which I have created the following way:
a <-c(1,1,1,1,1,2,2,2,2,2,3,3,3,3,3,4,4,4,4,4,5,5,5,5,5,6,6,6,6,6)
b <-c(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30)
df
2005 Mar 26
3
Convert keys (OpenSSL to OpenSSH)
Hello,
I would like to use Public Key authentication with OpenSSH. I am trying to use a
public / private key set created using CA.pl. http://www.openssl.org/docs/apps/CA.pl.html
I am not sure but I think my OpenSSL keys will not work until some conversion takes place.
I was able to get them working between Windows (Putty.EXE) and my SSHD server but
PuttyGen.EXE converted the public keys
2011 May 12
1
Maximization of a loglikelihood function with double sums
Dear R experts,
Attached you can find the expression of a loglikelihood function which I
would like to maximize in R.
So far, I have done maximization with the combined use of the
mathematical programming language AMPL (www.ampl.com) and the solver
SNOPT (http://www.sbsi-sol-optimize.com/manuals/SNOPT%20Manual.pdf).
With these tools, maximization is carried out in a few seconds. I wonder
if that
2011 Apr 18
4
altering identity column
Hi there,
I have a huge dataframe containing 70,000 observations.
I have filtered this dataframe (let it's name be "transformed_dataframe") as I wanted to select only those observations which are greater than or equal to 60,001 regarding the very first identity column.
So I have a transformed dataframe now including 10,000 obeservations (from 60,001 - to 70,000) and if you send