Displaying 20 results from an estimated 2000 matches similar to: "data.frame indexing"
2008 May 28
1
Can plot() be used for multiple plots?
Greetings helpRs --
I would like to use plot() to plot two cumulative distribution curves so
that a user of the plot can compare the distributions of the two
variables. The following code draws two distributions separately, but I
cannot find the instruction necessary to add a second cumulative
distribution to the first one.
Any suggestion would be very welcome.
x1 <-
2008 Apr 07
1
Width of text displayed in R
All,
I think this is pretty basic but I couldn't find the answer in any
source.
I have just built my own R for Linux (amd 64). It runs well, but R
thinks that it only has 80 characters or so of screen width. I log on
with Putty to the box and can stretch it as large as I want.
Is there a simple way to tell R to use more screen width when
displaying?
From whatami:
OS RELEASE :
2008 Apr 09
1
read table not reading lines containing single quotes
Hi,
* I am using read.table command as follow
kegg<-read.table("c:/IDs.tab",header =TRUE,quote= "'", sep="\t") *
Fragment of file is as follow:
ID Pathway
04916 Melanogenesis
04920 Adipocytokine signaling pathway
04930 Type II diabetes mellitus
04940 Type I diabetes mellitus
04950 Maturity onset diabetes of the young
05010
2008 Apr 25
3
How to overlap two density plots?
Hi,
How can I overlap two density plots?
A <- c(8,10,10,11,11,11,12,12,12,12,11,11,11,10,10,7)
B <- c(11,13,13,14,14,14,15,15,15,15,14,14,14,13,13,10)
plot(density(A))
plot(density(B))
Regards,
Emre
P.S. There's a overlap.density function in package DAAG
Is there another way to do this?
--
---
Emre ÜNAL
http://www.geocities.com/dusemre
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2008 Apr 07
2
read.table with multiple header lines
Hello,
I have difficulties in reading in a text file with multiple (=2) header lines. My table looks like this:
id code gr grcode AA AB AC AD
time 30 40 50 60
1 1234 1 c 0 1 0 0
2 1346 1 c 0 0 0 1
3 1456 1 c 0 0 1 1
4 1893 1 c 0 0 1 1
Can someone help me out?
Thanks
Deborah
--
2008 May 31
2
How to identify overlapped items from two list and plot them?
Hi list,
I have a question on how to identify the overlapped items from two vectors:
>x<-c(0,1,2)
>y<-c(1,2,2,3)
and plot the number of the overlapped as well as non-overlapped in a
diagram?
Thanks much,
Allen
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2008 May 09
1
data management question
Hi all,
I have a data management question. I am using an panel dataset read into
R as a dataframe, call it "ex". The variables in "ex" are: id year x
id: a character string which identifies the unit
year: identifies the time period
x: the variable of interest (which might contain NAs).
Here is an example:
> id <- rep(c("A","B","C"),2)
2008 Apr 14
3
how to add different type of lines (short dash, long dash) into current plot)
Dear
I try to add three different lines (solid, short dash, long dash) in to current barplot. I saw there are types of lines ("p","b", ect). However, they are not what I request. Has nayone have this experience?
Many Thanks!
Xin
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2008 Apr 29
2
Legend problem when exporting a plot to PDF
Hi list,
When exporting to PDF a graph with a legend, in the final PDF, the text
is going beyond the legend box.
> dev2bitmap("test.pdf", type="pdfwrite", h=6, w=6)
The legend looks OK on the screen.
I noticed that the size of the legend box depends on the size of the
screen window, which is not the case for other graphical parts (text of
the legend, title, axis
2008 Apr 08
4
Practical Data Limitations with R
We are new to R and evaluating if we can use it for a project we need to
do. We have read that R is not well suited to handle very large data
sets. Assuming we have the data prepped and stored in an RDBMS (Oracle,
Teradata, SQL Server), what can R reasonably handle from a volume
perspective? Are there some guidelines on memory/machine sizing based
on data volume? We need to be able to handle
2009 Sep 20
4
running many different regressions
Dear R community,
I have a dataframe with say 100 different variables. I wish to regress
variable 1 separately on every other variable (2-100) in a linear regression
using lm. There must be an easy way to do this without loops, but I have
difficulties figuring this out... Can you please help?
Thank you and best regards, Georg.
*****************************************
Georg Ehret
Johns Hopkins
2008 Apr 15
4
heavy graphs
Dear R community, I am creating large graphs with hundreds of
thousands of datapoints. My usual way for output was pdf, but now I am
getting file sizes of >30Mb that do not open well (or at all) in Adobe. Is
there a way to reduce the resolution or get rid of overlaying datapoints?
Any other idea is also warmly welcome!
Thank you and wishing you a good day!
Georg.
**********************
2010 Aug 27
3
predict.loess and NA/NaN values
Hi!
In a current project, I am fitting loess models to subsets of data in
order to use the loess predicitons for normalization (similar to what
is done in many microarray analyses). While working on this I ran into
a problem when I tried to predict from the loess models and the data
contained NAs or NaNs. I tracked down the problem to the fact that
predict.loess will not return a value at all
2011 Apr 13
5
Clearing Console; of weeks of codes!
Dear All:
I do see I have weeks of codes in my console when I check with my arrow up
keys. I have been clearing them with Control L but it seems to clear it
clear the screen temporally. I do see the previous codes again when I open R
the next day, after quitting the session!
Q:
How do I clear this?
Thanks;
YA
--
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2007 Jul 02
2
basics: changing the directory
Dear Ms. R,
I struggle with a very basic command for most of you: How to change the
working-directory by command-line?
Thank you!
Georg.
******************
Georg Ehret
Johns Hopkins University School of Medicine
Broadway Research Building, Room 572
733 N. Broadway
Baltimore, MD 21205
Phone: (410) 502-7530
Fax: (410) 502-7544
e-mail: georg@jhmi.edu
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2008 Nov 05
3
Efficient way to fill a matrix
Dear R experts,
Suppose I have a data frame of three variables:
> foo <- data.frame(row=1:5, col=1:3, val=rnorm(15))
> foo
row col val
1 1 1 -1.00631642
2 2 2 0.77715344
3 3 3 0.17358793
4 4 1 -1.67226988
5 5 2 1.08218836
6 1 3 1.32961329
7 2 1 -0.51186267
8 3 2 -1.20990127
9 4 3 -0.57786899
10 5 1 0.67102887
11 1 2
2008 Nov 25
2
invoking user-defined function
Dear list,
Can somebody tell me how to invoke user-defined functions from script
files during run-time?
Basically I have (almost) one function per script file.
I am thinking of something like
#include in C++
import in Java/Python
use in Perl
No, I don't need my functions every time R is started.
Neither I am thinking about writing building my functions into
packages.
I just
2008 Jun 26
2
density and jpeg
Dear R community, I am using densityplot (lattice package) for a large
dataset and wish to print it to a jpeg (the pdf is huge). R crashes
consistently. Am I doing it wrong or is densityplot incompatible with jpeg?
I work on a Mac, R 2.7.0.
> require(lattice)
> jpeg("test.jpeg")
> d[1:10]
[1] 0.700218 0.700175 0.700357 0.700847 0.698286 0.701520 0.698158 0.699300
0.698819
2008 Jul 30
2
Bizarre - R crashes on merge
Hi all,
I have a large data.frame, 1530 observation with 6 columns. I want to
merge a 7th column, a transformation of the response variable (hospital
admissions), namely
trans<-sqrt(copd$admissions+0.25)
trans<-data.frame(trans)
And now when I do
copd2<-merge(copd,trans)
(copd being my original data.frame), R either crashes or is taking an
extremely long time to do the computation. I
2008 Jul 11
3
number of effective tests
Dear R community,
I am using 6 variables to test for an effect (by linear regression).
These 6 variables are strongly correlated among each other and I would like
to find out the number of independent test that I perform in this
calcuation. For this I calculated a matrix of correlation coefficients
between the variables (see below). But to find the rank of the table in R is
not the right