Displaying 20 results from an estimated 300 matches similar to: "concatenate 2 data.frames"
2008 Apr 08
4
permutation test assumption?
Dear all,
Can I do a permutation test if the number of individuals in one group is much bigger than in the other group? I searched the literature but I didin´t find any assumption that refers to this subject for permutation tests.
Best regards
João Fadista
Ph.d. student
UNIVERSITY OF AARHUS
Faculty of Agricultural Sciences
Dept. of Genetics and Biotechnology
Blichers Allé 20, P.O.
2007 Feb 23
2
Extracting a subset from a dataframe
Good day everyone,
Can anyone suggest an effective method to solve
the following problem:
I have 2 dataframes D1 and D2 as follows:
D1:
dates ws wc pwc
2005-10-19:12:00 10.8 80 81
2005-10-20:12:00 12.3 5 15
2005-10-21:15:00 12.3 3 15
2005-10-22:15:00 11.3 13 95
2005-10-23:12:00 12.3 13 2
2005-10-24:15:00 10.3 2 95
2005-10-25:15:00 10.3 2 2
D2:
2007 Mar 30
1
Model comparison
Dear all,
I would like to know if I can compare by a significance test 2 models with different kind of parameters. Perhaps I am wrong but I think that we can only compare 2 models if one is a sub model of the other.
Med venlig hilsen / Regards
João Fadista
Ph.d. studerende / Ph.d. student
AARHUS UNIVERSITET / UNIVERSITY OF AARHUS
Det Jordbrugsvidenskabelige Fakultet / Faculty of
2007 Jul 20
3
binned column in a data.frame
Dear all,
I would like to know how can I create a binned column in a data.frame. The output that I would like is something like this:
Start Binned_Start
1 0-5
2 0-5
6 5-10
8 5-10
13 10-15
...
Best regards
João Fadista
Ph.d. student
UNIVERSITY OF AARHUS
Faculty of Agricultural Sciences
Dept. of Genetics and Biotechnology
Blichers
2007 Jul 18
2
remove columns having a partial match name
Dear all,
I would like to know how can I retrieve a data.frame without the columns that have a partial match name. Let´s say that I have a data.frame with 200 columns and 100 of them have the name "StartX", with X being the unique part for each column name. I want to delete all columns that have the name starting with "Start". I´ve tried to do this but it doesn´t work:
>
2007 Jun 28
4
compare 2 vectors
Dear all,
I would like to take out the values from one vector that are equal to the values in another vector.
Example:
a <- c(1,2,3,4,5,6,7,8,9)
b <- c(3,10,20,5,6)
b_noRepeats = c(10,20)
So I would like to have the vector b without the same values as vector a.
Kind regards,
João Fadista
[[alternative HTML version deleted]]
2007 Sep 05
6
length of a string
Dear all,
I would like to know how can I compute the length of a string in a dataframe. Example:
SEQUENCE ID
TGCTCCCATCTCCACGG HR04FS000000645
ACTGAACTCCCATCTCCAAT HR00000595847847
I would like to know how to compute the length of each SEQUENCE.
Best regards,
João Fadista
[[alternative HTML version deleted]]
2004 May 04
2
Seeing the definition of a function
Dear all,
I was trying to see how the function 'confint' is defined. Doing
> confint
function (object, parm, level = 0.95, ...)
UseMethod("confint")
<environment: namespace:stats>
does not really enlighten me. How can I get to see the implementation (I guess it should be possible according to the general philosophy of the R project)?
Thanks in advance
S??ren
2007 Sep 07
1
contourplot lines, text, and mtext
If I have a contourplot (in the lattice package) and I want to add
straight lines to it, how do I do this?
I see that there are llines() and lsegement() functions for lattice
plots, but they don't seem to do anything in this case:
library(lattice)
library(KernSmooth)
x=rnorm(10000)
y=x+rnorm(x,0,.5)
a=bkde2D(cbind(x,y),.7)
z=as.vector(a$fhat)
grid=expand.grid(x=a$x1,y=a$x2)
grid$z=z
2007 Oct 10
1
subsetting a data.frame
Dear all,
I would like to be able to subset a data.frame in a special way. I will put here an example:
Score Name
88 000019_0070
88 000019_0070
87 000019_0070
79 002127_0658
79 002127_0658
77 002127_0658
So, for the above example I would like to have a new data.frame that has only the best "Score" for each
2007 Oct 31
1
find overlap between intervals
Dear all,
I would like to be able to know the intervals of my data that overlap between them. Here it goes a small example:
Input:
Start End
440 443
380 443
290 468
Desired output:
Start End
290 380
380 440
440 468
Best regards,
João Fadista
[[alternative HTML version deleted]]
2007 Oct 09
1
read only certain parts of a file
Dear all,
I would like to know how can I read a text file and create a data frame of only certain parts of the file.
For instance, from this text file:
===================================================
Matches For Query 0 (108 bases): 000019_0070
===================================================
Score Q_Name S_Name Q_Start Q_End S_Start S_End Direction Bases identity
89 000019_0070
2007 Sep 06
1
order intervals in a data.frame
Dear all,
I would like to know how can I order a data.frame with increasing the dat$Interval (dat$Interval is a factor). There is an example below.
Original data.frame:
> dat
Interval Number_reads
0-100 685
200-300 744
100-200 1082
2002 Dec 09
2
R as a COM client - is it possible?
Dear all,
In S+, there are functions like
create.ole.object
call.ole.method
release.ole.object
for communicating with other programs which work as a COM server (on
Windows).
Is it possible to do something similar in R (I've studied the 'connections'
facilities, but they do not seem to work).
==========================================
S?ren H?jsgaard, PhD, Senior Scientist
2018 Mar 16
1
Help on multi-line plot
Hello R-Users
I am struggling with this line plot, it might be simple but I am missing
something here.
First of all I want to make multiple line plots across seasons
(DJF,MAM,JJA,SON) for 12 variables (here, called nodes) and fill them with
the node.
So that season=x-axis, node=line col and freq=y-axis.
My plot currently links all DJFs, MAMs, JJAs and SONs, however I will like
them to be
2007 Aug 23
1
nls() and numerical integration (e.g. integrate()) working together?
Dear List-Members,
since 3 weeks I have been heavily working on reproducing the results of an
economic paper. The method there uses the numerical solution of an integral
within nonlinear least squares. Within the integrand there is also some
parameter to estimate. Is that in the end possible to implement in R
[Originally it was done in GAUSS]? I'm nearly into giving up.
I constucted an
2004 Feb 24
1
rstandard does not produce standardized residuals
Dear all,
the application of the function rstandard() in the base package
to a glm object does not produce residuals standardized to
have variance one:
the reason is that the deviance residuals are divided
by the dispersion estimate and not by the
square root of the estimate for the dispersion.
Should the function not be changed to produce residuals
with a variance about 1?
R 1.8.1 on
2012 Jan 06
5
add data to a file while doing a loop
Hi,
I would like to know how can I keep adding data to a file while doing a loop and without deleting the data of the previous iteration. Thanks.
2002 May 31
2
error in seq.POSIXt?
I am trying to extract only the winters (defined to be 01-Dec through
28-Feb) of daily data from 1948-2002. There are 90 days in each winter
season. I wrote the following code to gather the winter dates into a
single vector:
DJF <- NULL
for(year in 1949:1999) {
temp.begin <- strptime(paste("01/12", year-1, sep="/"), "%d/%m/%Y")
temp.end <-
2011 Sep 22
2
Subsetting a zooreg object using window / subset
Dear R users,
I am currently working in subsetting a zooreg() object using either window or subset. I have a solution but it may be a bit cumbersome when I start working with actual data. Your inputs would be greatly appreciated.
Example: I have a zooreg() object that starts in 1997 and ends in 2001. This object contains daily data for the 4 years