Displaying 20 results from an estimated 2000 matches similar to: "Efficient passing through big data.frame and modifying select fields"
2008 Nov 25
1
Efficient passing through big data.frame and modifying select
> -----Original Message-----
> From: William Dunlap
> Sent: Tuesday, November 25, 2008 9:16 AM
> To: 'johannes_graumann at web.de'
> Subject: Re: [R] Efficient passing through big data.frame and
> modifying select fields
>
> > Johannes Graumann johannes_graumann at web.de
> > Tue Nov 25 15:16:01 CET 2008
> >
> > Hi all,
> >
> >
2009 Mar 09
5
Help
Hello Everyone,
I am trying to excess the inbuit .Fortran and .C codes of R. Can any one
help me in that. For example in kmeans clustering the algorithms are written
in .Fortran I want to access them and see the .Fortran syntax of the codes.
Can any one help me how can I do that?
Thanx,
Nitin Kumar
On Thu, Nov 27, 2008 at 12:00 PM, <r-help-request@r-project.org> wrote:
> Send R-help
2002 Jan 18
2
length of dimnames???
Hi:
I have made a lot of progress reading and manipulating large data
files, thanks to the help of several of you. I am now stuck with
writing the final file with the following error (see also the full
transcript below):
Error in as.matrix.data.frame(x) : length of dimnames[2] not
equal to array extent
I do not know what it means and could not find how to get around that
in the manual nor
2011 Apr 05
2
Help to check data before putting it in a database
The example scene:
I have a database with stats about each goal made by my soccer team. This
database (a data frame in R) is organized in lines (goals) with a set of
columns containing data about these goals (player name, tactic position,
etc). For now, this database will be called "data.frame1".
What I need is to feed this "data.frame1" with new information about my team
2007 Aug 14
2
Question about unicode characters in tcltk
hello list,
Can someone help me figure out why the following code doesn't work?
I'm trying to but both Greek letters and subscripts into a tcltk menu.
The code creates all the mu's, and the 1 and 2 subscripts, but it
won't create the 0. Is there a certain set of characters that R won't
recognize the unicode for? Or am I input the \u2080 incorrectly?
library(tcltk)
m
2005 Aug 12
2
coercing created variables into a new data frame using na.omit()
Hi,
I am an R newbie and one thing I am having trouble with binding variables that
I have created within one data frame into a new data frame when using
na.omit(). To illustrate this problem I will give the example I am working on
and the approah I have been using:-
data.frame1<-filepath....
attach(data.frame1)
#create a new variable using a function
new.variable<-rep(1,length(weight3))
1999 Mar 01
1
"xpdrows.data.frame" (PR#131)
This is a follow-up to bug sent to days ago, which bounced from r-devel
because
the example was to large. Now example is smaller, and behaviour is as
belo,
EXEPT that r-windows not any more bombs, so main problem is
"xpdrows.data.frame"???
By the way, how to debug this example under windows? debug() doesnt
accept
the functions used (.Primitive), and R wont run under gdb --- may have
2010 Jan 20
1
Merge and join data
Hi,
I'm looking to combine two data frames. Several of the columns are in
common while the others need to be summed up. The apply functions and
the merge functions don't seem to be working. I've included a basic
example of what I'm trying to do below. Thanks!
Sean
data.frame1<-as.data.frame(matrix(c('winter','dredge','515',100,150),1,5))
2012 Jan 14
3
add column with values found in another data frame
I am positive this problem has a very simple solution, but I have been
unable to find it, so I am asking for your help. I need to know how to look
something up in one data frame and add it as a column in another. If I have
a data frame that looks like this:
> frame1
ID score test age
1 Guy1 10 1 20
2 Guy1 13 2 20
3 Guy2 9 1 33
4 Guy2 11 2 33
and another frame that looks like this:
2008 May 26
1
To draw observation [m, n] from 20 data frames named frame1, ... , frame20
Hi all,
I have 20 data frames, named frame1, ... , frame20. Each data frame has the
dimension 20x5. I need to build a function that calls out the observation in
Row 1, Col 2 from all 20 data frames and places it in a vector of length 20. I
have tried the following code:
vect <- rep(0,20)
for(i in 1:20){
vect[i] <- paste("frame",i,"[1,2]",sep="")
}
The
2006 Oct 16
3
lda
I'm trying to do a linear discriminant analysis on a dataset of three
classes ("Affinities"), using the MASS library:
> data.frame2 <- na.omit(data.frame1)
>
> data.ld = lda(AFFINITY ~ ., data.frame2, prior = c(1,1,1)/3)
Error in var(x - group.means[g, ]) : missing observations in cov/cor
What does this error message mean and how can I get rid of it?
Thanks!
Pieter
2008 Aug 04
0
AEC
Hi,I'am new to speex,i have a question:
Suppose i have two frames:frame1(5ms),frame2(10ms),And i don't want to do aec in middle 5ms frame. Can i just link them in frame1(5ms)....000000(5ms).....frame2(15ms),then do AEC with recorded buffer(20ms)?
_________________________________________________________________
???MSN???????????????????
http://mobile.msn.com.cn/
-------------- next part
2013 Feb 13
3
match in dependence of 2 columns
Hello,
i want to match a column of one data.frame to another, my problem is, that i
only want to match the data, if 2 columns are equal.
i have a example:
data.frame1
cu.nr. name value
A 1 Evo 100
B 1 Mer 80
C 2 Ford
2002 Jun 27
1
Simple Matrix plot question
Hello.
I'd like to produce a simple pairs-like plot
with two data frames - but not a traditional scatter-plot matrix -
just multiple bivariate plots of data.frame1[i] vs data.frame2[i] ...
In other words, given data frames X and Y, I'd like multiple plots on a
page like:
Y1 Y2 Y3
X1
X2
X3
Thanks in advance.
-R
2010 Sep 29
2
Adding two data.frames.
Hi
I have two data frames that contains the same sort of data and I want do add
them together to get one big data frame, anyone know how to do that?
ex:
data.frame1
A B C
1 2 3
4 5 6
7 8 9
and
data.frame2
A B C
9 8 7
6 5 4
3 2 1
Would then become one big set:
data.frame3
A B C
1 2 3
4 5 6
7 8 9
9 8 7
6 5 4
3 2 1
Thx for your help
//Joel
--
View this message in context:
1999 Nov 08
2
frame_info_add
Hi,
I have this idea:
It can be useful to have for each frame two variables stored in bitstream that will hold information about starting and ending position of \"valid\" samples in the frame.
With these additional information it will be possible to do simple editing (like cutting or concatenating two streams) without decompressing/recompressing at sample-granularity.
Simple example
2003 Mar 11
0
Interrater and intrarater reliability
Dear R users
The following function is R code for the main compuations in the article:
M. Eliasziw, S Lorraine Young, M Gail Woodbury and Karen Fryday-Field (1994):
Statistical Methodology for the Concurrent Assessment of Intrarater and
Intrarater Reliability: Using Goniometric Measurements as an Example.
Physical Therapy 74 (8); 777-788
The function gives the estimated inter- and intrarater
2000 Apr 14
1
Rd2Sd conversion: files (PR#520)
This is a multipart MIME message.
--==_Exmh_-19086308140
Content-Type: text/plain; charset=us-ascii
In addition to my previous message, here is the source Rd-file that I used in
R CMD Rdconv -d --type=Sd plot.mefista.Rd > plot.mefista.d
command.
--==_Exmh_-19086308140
Content-Type: text/plain ; name="plot.mefista.Rd"; charset=us-ascii
Content-Description: plot.mefista.Rd
2005 Oct 09
3
cor doesn't accept na.rm? (PR#8193)
Full_Name: Paul Bailey
Version: 2.1.1
OS: OS X 10.3
Submission from: (NULL) (68.252.250.144)
?cor
[tells me that it has a na.rm variable]
> cor(frame2[1,],frame2[2,],na.rm=T)
Error in cor(frame2[1, ], frame2[2, ], na.rm = T) :
unused argument(s) (na.rm ...)
hmm.
2008 Dec 23
1
quotation problem/dataframe names as function input argument.
Dear R friends:
Can someone help me with the following problem? Many thanks in advance.
# Problem Description:
# I want to write functions which take a (character) vector of dataframe
names as input argument.
# For example, I want to extract the number of observations from a number of
dataframes.
# I tried the following:
nobs.fun <- function (dframe.vec)
{
nobs.vec <-