Displaying 20 results from an estimated 2000 matches similar to: "confused about histograms"
2002 Jan 24
3
getting rank order
I'm doing a study where people place a deck of cards in a certain
order. It's sufficient to assume that their colors & each has a
number (it's actually about attributes of hobbies). I'd like to look
for patterns in how they've arranged the deck. For each subject I
have a list like 3,5,2,4,1, indicating that (s)he chose 3 first, then
5, then 2. . . .
I think what I first
2002 Aug 09
2
RMySQL fetch defaults to N=500?
It appears that fetch() gets only the first 500 rows by default. I
don't see this in the documentation, but
timeinfo <- fetch(rs)
gets only 500 rows where
timeinfo <- fetch(rs,n=-1)
gets (correctly) 736 for the same query. Is this an undocumented
feature? I played with this data for an alarming amount of time
before I realized that I was missing a third of the data. I
2002 Feb 12
1
increasing space available for labels
I've got a graph with really long labels. I've tried decreasing the
font size, but they're still getting truncated. I've RTFMed & it
seems that mgp should have something to do with this, but I can't make
it work. I need about 2-3x as much space for labels as is available
by default (or on the example below).
boxplot(split(ranks,c(1:25)), names=items, horizontal=F)
2003 May 23
1
Summary statistics & plots of repeated measures data
I'm an R novice and my colleagues are about to convince me to get my
data into SPSS, which will presumably be easier for someone who
doesn't live in R to point and click his way into some kind of
analysis that might be meaningful.
I've got two groups of subjects (classkey in the table below).
They've each received several different treatments. One measure is a
1-7 rating taken
2002 Jan 15
3
Getting started with R
I've got a background in computer science & have been using Linux for
nearly a decade. I'm working on a Ph.D. in education and technology
and I essentially live in emacs and do all of my writing in LaTeX.
To me R seems like the perfect stats package. Unfortunately, the
learning curve is killing me. I feel like that if I'd waded through
pulling down menus in SPSS or SAS I could
2003 Jul 18
1
confused about x-coordinates and bar charts
Thanks for all the help on my previous histogram problem. I intend to
summarize the solutions back to the list Real Soon Now, but first, I've
got another problem.
I've made a bar chart that reports means. I'd like to put the number
of observations on top of each bar. Here's what I've got:
barplot((subset$x),
col=grey(.5),
ylab="Mean Engagement
2002 Feb 21
2
help understanding box plots
Another naive stats question. I'm trying to better understand what
boxplots are telling me.
I think what I see is the median and the boundaries of the 1st and 3rd
quartiles. The whiskers represent the range of the data unless there
are points which are outside "range" (default: 1.5) times the distance
from the median to that quartile. Is that right? I've read the
2002 Aug 07
1
No subject
I've got a table of 1 row per observation.
16 questions * n subjects * 4 classrooms (2 teachers * 2 conditions)
I'd like to run some simple regressions that look something like this:
lm(length ~ elapsed)
I'd like to do the regressions several times, split out by
questionkey, student, class. What I've been doing is using a series
of which's to create new data sets (e.g.
2002 Jan 23
2
exporting plots
I'm running R (latest) on linux, using gnome. I was wondering how
export the plots to an image file of sort sort. I can't find anything
obvious in the documentation.
Thanks in advace. Please CC me any replies, as I'm not subscribed to
the list.
-Aaron
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read
2010 Oct 07
0
Categorical variables and Plotting a Cox model with interaction terms
I'm a new to the R world and I have been following the John Fox Appendix on
Cox regression
(http://cran.r-project.org/doc/contrib/Fox-Companion/appendix-cox-regression.pdf)
to run some analyses. I have been able to generate models and some simple
figures e.g.:
>library(splines) #required for survival package
>library(survival) #req for Coxph
2010 Jul 01
1
Modelling survival with time-dependent covariates
Hi all,
I am looking at the tutorial/appendix from John Fox on ?Cox Proportional-Hazards Regression for Survival Data? available here:
http://cran.r-project.org/doc/contrib/Fox-Companion/appendix-cox-regression.pdf
I am particularly interested in modelling survival with time-dependent covariates (Section 4).
The data look like this:
> Rossi.2[1:50,]
start
stop arrest.time week arrest fin
2005 Dec 19
2
Advanced search/filter use cases
I''ve been working on an application lately that has a lot of advanced
search and filtering functionality (with ranges and substring searches
for each attribute). Despite being a pretty common use case, this isn''t
supported particularly well by any framework I''ve used, including Rails.
I''d like to fix that. :)
Right now, my major pet peeves are:
1. Long,
2016 Mar 08
4
[cfe-dev] llvm and clang are getting slower
----- Original Message -----
> From: "Mehdi Amini via cfe-dev" <cfe-dev at lists.llvm.org>
> To: "Rafael EspĂndola" <rafael.espindola at gmail.com>
> Cc: "llvm-dev" <llvm-dev at lists.llvm.org>, "cfe-dev" <cfe-dev at lists.llvm.org>
> Sent: Tuesday, March 8, 2016 11:40:47 AM
> Subject: Re: [cfe-dev] [llvm-dev] llvm and
2011 Dec 10
2
p-value for hazard ratio in Cox proportional hazards regression?
Hi,
I'm new to R and using it for Cox survival analysis. Thanks to this great forum I learned how to compute the HR with its confidence interval.
My question would be: Is there any way to get the p-value for a hazard ratio in addition to the confidence interval?
Thanks,
Thierry
--
Thierry Panje Visiting Student Researcher
Department of Psychology Stanford
2006 Apr 28
1
stupid trick of the day (fried polycom)
I've been playing around with a new system I'm going to install in
another office. In setting up the Polycom's, I accidently used a new
power supply from a new 601 (24VDC) with an 600. The 600 only
require 12VDC. Now, I get nothing on the screen of the 600 when I
plug in 12 VDC. (At the time, I didn't even realize the power
supplies were supplying different voltages.)
2003 Nov 11
1
Cannot enable browsing, chdir to /tmp denied...
Hello,
Samba refuses to be browseable. I started out wanting to configure it as a
PDC, just as I have done previously with samba 2.2.8 (and openldap).
smbclient -L localhost -U% gives "Error returning browse list:
NT_STATUS_NETWORK_ACCESS_DENIED".
Using debian 3.0r1, samba 3.0.0, openldap with nsswitch, etc.
I am a newbie at looking at the logs, I see the access denied
2004 Dec 08
4
1.0-test57
http://dovecot.org/test/
Two important fixes:
- Fixes the recently reported dovecot-auth crashes with unexpected
client input
- Fixes mbox corruption in some not-so-common cases. Hopefully this is
the last one. I added more asserts anyway which try to catch similiar
mistakes and avoid losing data.
Others:
- Added oe-ns-eoh workaround for pop3. Fixes outlook/netscape problems
with buggy
2006 Apr 23
12
Patches for object tracking
The following patches implement object tracking. Note nasty games I
play to make the tracking global. SWIG 1.3.30 won''t need this. I also
updated the minimum required SWIG version to 1.3.29.
Roy
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2009 Jul 28
1
chan_dahdi.conf parser question
My config works fine but I must be missing a concept because a small change
gives an unexpected result. Can someone help me understand the
chan_dahdi.conf parser that would explain this?
Based on the config below, Channels 1-23 are assigned to the context
inbound-pri, and Channels 25-47 are assigned to the context outbound-pri. As
expected.
[trunkgroups]
; We do not do NFAS at this time
2007 Apr 16
2
Histograms of lots of variables
Hi R-helpers,
I wish to produce frequency histograms of all of the variables in my
dataframe (except some identifying variables).
I have tried
>hist(dataframe[,3:20])
to produce histograms of the 3rd through 20th variables in my dataframe, but
R doesn't like that.
Could anyone provide a suggestion?
Also, once I produce the histograms, I'd like to save them as graphic files
on my