Displaying 20 results from an estimated 4000 matches similar to: "converting a zoo or an xts to a data frame"
2009 Nov 17
2
Lattice plot
Hi,
I was trying to get a graph in lattice with the following data frame (7 rows, 5 cols):
chr start1 end1 meth positive
1 1 10 20 1.5 y
2 2 12 18 -0.7 n
3 3 22 34 2.0 y
4 1 35 70 3.0 y
5 1 120 140 -1.3 n
6 1 180 190 0.2 y
7 2 220 300 0.4 y
I wanted the panels to be organized by 'chr' -
2012 Dec 28
2
[LLVMdev] Can simplifycfg kill llvm.lifetime intrinsics?
> Suppose you have four lifetime operations on the same address in memory,
> with loads and stores all around them:
>
> start1--end1 .. start2--end2
>
> If you remove start1 then you have a bare pointer, the memory came from
> somewhere and you lose the optimization that loads before start1 become
> undef, but you don't miscompile.
This is assuming no looping after
2012 Dec 28
0
[LLVMdev] Can simplifycfg kill llvm.lifetime intrinsics?
On 12/27/2012 12:35 PM, Rafael EspĂndola wrote:
>>> Oh, I was reading "precedes/following" as having static (dominance)
>>> meaning. That is, in the above example you could not delete the store
>>> since it is not true that
>>> llvm.lifetime.end dominates it.
>>>
>>> Nick, is this what you had in mind? If not, then we must delete a
2010 Jul 01
4
left end or right end
Dear all,
I am a biologist. I have two sets of distance P(start1, end1) and Q(start2,
end2).
The distance will be like this.
P ------------------------
Q ----------------------------------------
I want to know whether P falls closely to the right end or left end of Q.
P and Q are of different lengths for each data point. There are more than
10000 pairs of P and Q.
Is there any test or
2004 Oct 19
2
Sweave and Trellis in R 2.0.0patched (Windows)
I've been using the following code to plot using Sweave in version
1.9.1
library(RODBC)
library(lattice)
channel <-odbcConnectExcel("h:/water.xls")
data <- sqlQuery(channel,"select * from `Sheet1$` where Test = 'TOC' and
(Valve='5010-05' or Valve='8030-V26' or Valve='1180-08' or
Valve='5040-08')")
odbcClose(channel)
srt <-
2012 Dec 27
5
[LLVMdev] Can simplifycfg kill llvm.lifetime intrinsics?
>> Oh, I was reading "precedes/following" as having static (dominance)
>> meaning. That is, in the above example you could not delete the store
>> since it is not true that
>> llvm.lifetime.end dominates it.
>>
>> Nick, is this what you had in mind? If not, then we must delete a
>> matching llvm.lifetime.end, but it is not clear how we define
2011 Mar 17
3
date conversion
Dear R People:
I have a monthly time series which runs from January 1998 to December 2010.
When I use tsp I get the following:
> tsp(ibm$ts)
[1] 1998.000 2010.917 12.000
Is there an easy way to convert this to a seq.Date object, please?
I would like to have something to the effect of
1998/01/01 .... 2010/12/01
Thanks,
Erin
--
Erin Hodgess
Associate Professor
Department of Computer
2010 Jun 10
2
[R[ dates on zoo objects
Dear R People:
I have a zoo object with its date index as a factor.
> xAle1.zoo$index
Error in xAle1.zoo$index : $ operator is invalid for atomic vectors
> str(xAle1.zoo)
Class 'zoo' atomic [1:32] 1253 1316 1038 1157 1710 1489 1159 1142 945 1245 ...
..- attr(*, "index")= Factor w/ 32 levels "04/16/09","04/17/09",..:
1 2 3 4 5 6 7 8 9 10 ...
>
2010 Mar 07
3
aggregate for zoo or its?
Dear R People:
The aggregate function works very well on regular time series.
Is there a version for zoo or its that would take daily data and
convert it to monthly, please?
Thanks in advance,
Sincerely,
Erin
--
Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences
University of Houston - Downtown
mailto: erinm.hodgess at gmail.com
2010 Mar 26
4
Competing with SPSS and SAS: improving code that loops through rows (data manipulation)
Dear R-ers,
In my question there are no statistics involved - it's all about data
manipulation in R.
I am trying to write a code that should replace what's currently being
done in SAS and SPSS. Or, at least, I am trying to show to my
colleagues R is not much worse than SAS/SPSS for the task at hand.
I've written a code that works but it's too slow. Probably because
it's
2010 Apr 11
0
converting a ts object to an xts object
Dear R People:
This is probably is very simple question. I have a monthly time
series, ibm$ts , that I would like to convert to a quarterly series.
I know that I could use "aggregate", but I am interested in the
to.quarterly conversion, please.
Here is my example:
> str(ibm$ts)
Time-Series [1:144] from 1998 to 2010: 43.7 46.3 46 51.4 52.2 ...
> tsp(ibm$ts)
[1] 1998.000 2009.917
2010 Jun 02
2
building time series/zoo/its from a data frame
Dear R People:
I have the following data frame:
> x.df
date cond freq
1 04/01/09 Fever 12
2 04/02/09 Fever 11
3 04/03/09 Fever 10
4 04/04/09 Fever 13
5 04/05/09 Fever 6
6 04/01/09 Rash 6
7 04/02/09 Rash 10
8 04/03/09 Rash 9
9 04/04/09 Rash 10
10 04/05/09 Rash 8
11 04/01/09
2010 Aug 01
1
aggregating a daily zoo object to a weekly zoo object
Dear R People:
I'm trying to convert a daily zoo object to a weekly zoo object:
xdate <- seq(as.Date("2002-01-01"),as.Date("2010-07-10"),by="day")
library(zoo)
length(xdate)
xt <- zoo(rnorm(3113),order=xdate)
xdat2 <- seq(index(xt)[1],index(xt)[3113],by="week")
xt.w <- aggregate(xt,by=xdat2,mean)
Error: length(time(x)) ==
2010 Jun 24
1
?to calculate sth for groups defined between points in one variable (string), / value separating/ spliting variable into groups by i.e. between start, NA, NA, stop1, start2, NA, stop2
Dear useRs,
Thanks for any advices
# I do not know where are the examples how to mark groups
# based on signal occurence in the additional variable: cf. variable c2,
# How to calculate different calculations for groups defined by (split by occurence of c2 characteristic data)
#First example of simple data
#mexample 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
2010 Jul 26
1
zoo objects and "c"
Dear R People:
I would like to combine a zoo object with some observations at the end.
Here is the set up:
> xgh
2010-06-15 2010-06-16 2010-06-17 2010-06-18 2010-06-19 2010-06-20 2010-06-21
5 6 1 5 0 0 13
2010-06-22 2010-06-23 2010-06-24 2010-06-25 2010-06-26 2010-06-27 2010-06-28
9 6 4 6
2010 Mar 02
2
plotting a subset of a time series
Dear R People:
I have the following time series and plot:
> x <- ts(rnorm(50),start=2005,freq=12)
> plot(x)
>
which works fine.
I would like to plot a subset of that time series, which I did with:
> plot(window(x,2005,2006.83))
Is there a better way to do this, please?
Thanks,
Erin
--
Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences
2011 Mar 17
1
possible problem with "endpoints"?
Dear R People:
Hello again!
I found something unusual in the behavior of the "endpoints" function
from the xts package:
> x1 <- ts(1:24,start=2008,freq=12)
> dat <- seq(as.Date("2008/01/01"),length=24,by="months")
> library(zoo);library(xts)
> x2 <- zoo(1:24,order=dat)
> #Here is the surprise:
> endpoints(as.xts(x1),'quarters')
2011 Jun 21
5
omitting columns from a data frame
Dear R People:
I have a data frame, xm1, which has 12 rows and 4 columns.
If I put is xm1[,-4], I get all rows, and columns 1 - 3, which is as
it should be.
Now, is there a way to use the names of the columns to omit them, please?
Thanks so much in advance!
Sincerely,
Erin
--
Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences
University of Houston - Downtown
2011 Jan 15
2
access to right time unit when checking for time execution
Hello,
I really wonder how to distinguish between secs and mins in the example
below.
In other terms, how can I access the time unit in variable d ?
start1 <- Sys.time();
stop1 <- Sys.time(); d <- stop1-start1; print(d);
v<-unlist(strsplit(as.character(d), split=" ")); print(v)
Time difference of 3.024054 secs
[1] "3.02405381202698"
stop1 <- Sys.time(); d
2013 Oct 31
1
an rpy2, R cgi type question
Hi again.
I'm putting together a little project with R, python, and a website. So I
have an HTML file, a py file, an R file.
Here is the HTML file:
<form action="/cgi-bin/radio4.py" method="post" target="_blank">
<input type="radio" name="subject" value="Integrate" /> Integrate
<input type="radio"