Displaying 20 results from an estimated 8000 matches similar to: "R-beta: CI for median in funtion boxplot"
2007 Aug 30
2
Q: Mean, median and confidence intervals with functions "summary" & "boxplot.stats"
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2012 Jan 29
1
Modifying whiskers in boxplots?
Hello,
I know this has been covered on here before, but as a complete novice, I
need a little more guidance. I would like to produce boxplots with the
whiskers extending to the 10 and 90th percentiles. I found this code:
myboxplot.stats <- function (x, coef = NULL, do.conf = TRUE, do.out =
TRUE)
{
nna <- !is.na(x)
n <- sum(nna)
stats <- quantile(x, c(.1,.25,.5,.75,.9), na.rm
2008 Aug 05
5
boxplot with average instead of median
I really like the ease of use with the boxplot command in R. I would
rather have a boxplot that shows the average value and the standard
deviation then the median value and the quartiles.
Is there a way to do this?
Chad Junkermeier, Graduate Student
Dept. of Physics
West Virginia University
PO Box 6315
210 Hodges Hall
Morgantown WV 26506-6315
phone: (304) 293-3442 ext. 1430
fax: (304)
2006 Oct 09
1
boxplot, notches, etc.
Sorry to repost this, but it looks like it's getting
buried in r-help (originally posted October 5: my experience
says that if it hasn't been answered by then it won't be).
I wouldn't bother, but I'm worried that r-devel might be
better, *and* a previous e-mail of mine on the subject in
January also seemed to get buried.
Synopsis: boxplot notches look weird when notches
are
2005 Dec 01
8
Impaired boxplot functionality - mean instead of median
Hello to all users and wizards.
I am regulary using 'boxplot' function or its analogue - 'bwplot' from
the 'lattice' library. But they are, as far as I understand, totally
flawed in functionality: they miss ability to select what they would
draw 'in the middle' - median, mean. What the box means - standard
error, 90% or something else. What the whiskers mean -
2002 Jul 21
3
boxplot(): formating median in another linethickness?
Dear guRus,
I want to do some boxplots, but the median sould appear in another
line-thickness and another color.
I do not know, what to do in order to realise my wishes.
Sorry for that question, but I am new to R.
cheers
steph
--
Linux: the operating system with a CLUE...
Command Line User Environment.
--------------------------------------
Stephan Holl
GnuPG Key-ID: 11946A09
ICQ#
2004 Mar 01
3
boxplot notches
Dear list members,
Can anyone tell me how the notches in boxplot(Y~X,notch=T) are
calculated? What do these notches represent exactly? I?d suppose they
are Conficence Intervals for the median, but I?ve also been told they
might show Least Significant Difference (LSD) equivalents.
I would very much appreciate any help from you.
Best regards
Chris.
2011 Apr 17
3
Box plot with 5th and 95th percentiles instead of 1.5 * IQR: problems implementing an existing solution...
Hi all,
I'm just getting started with R and I would appreciate some help. I'm having
trouble creating a boxplot with whiskers at the 95th and 5th percentiles
instead of at 1.5 * IQR. I have read the relevant documentation, and checked
existing mails on this topic. I found a small modification that should work
: https://stat.ethz.ch/pipermail/r-help/2001-November/016817.html and tried
to
2013 Mar 21
2
Displaying median value over the horizontal(median)line in the boxplot
Hi,
set.seed(45)
test1<-data.frame(columnA=rnorm(7,45),columnB=rnorm(7,10)) #used an example probably similar to your actual data
apply(test1,2,function(x) sprintf("%.1f",median(x)))
#columnA columnB
# "44.5"? "10.2"
par(mfrow=c(1,2))
lapply(test1,function(x) {b<-
2008 Apr 21
3
Choice of notch size in R
Is there a way to modify the choice of notch size [1] in R's boxplot
routine from outlining a 5% significance region, to say 1% or lower?
Thanks,
Alex
[1] McGill, Tukey, and Larsen. "Variations of Box Plots", The American
Statistician, Vol. 32, No. 1, 12-16.
2009 Jan 16
3
basic boxplot questions
dear R experts:
I am playing with boxplots for the first time. most of it is
intuitive, although there was less info on the web than I had hoped.
alas, for some odd reason, my R boxplots have some fat black dots, not
just the hollow outlier plots. Is there a description of when R draws
hollow vs. fat dots somewhere?
[and what is the parameter to change just the size of these dots?]
Also, let
2006 Jan 23
1
too-large notches in boxplot (PR #7690)
PR #7690 points out that if the confidence intervals (+/-1.58
IQR/sqrt(n)) in a boxplot with notch=TRUE are larger than the
hinges -- which is most likely to happen for small n and asymmetric
distributions -- the resulting plot is ugly, e.g.:
set.seed(1001)
npts <- 5
X <- rnorm(2*npts,rep(3:4,each=npts),sd=1)
f <- factor(rep(1:2,each=npts))
boxplot(X~f)
boxplot(X~f,notch=TRUE)
I can
2010 May 07
1
How to pass value to an argument in a function which is an argument to the main function
Dear all,
I constructed this function called my.boxplot.stats by replacing fivnum()
with quantile() in function boxplot.stats(). So I can try different quantile
methods in bwplot(). The problem is I couldn't pass different values to the
"type" argument to my.boxplot.stats, which in turn is an argument in
bwplot(). Now I just have to manually change the "type" value in
2006 Mar 22
3
ordering boxplots according to median
Dear R-users,
Does anyone knows how I can order my serie of boxplots from lowest to
highest median (which is much better for visualization purposes).
thanks in advance,
willem
[[alternative HTML version deleted]]
2008 Jan 31
1
how to customize boxplot
Dear List,
I'd like to make boxplots of a large number of observations (+/-
20.000), which are distributed log-normal and right skewed. The
problem is that with standard boxplots a too large number of
observations are displayed as outliers. I also tried to display the
log of the observations, but even then there are to may outliers to my
taste. So I'd like to change the standard IQR box
2006 Oct 05
1
unexpected behavior of boxplot(x, notch=TRUE, log="y")
A function I've been using for a while returned a surprising [to me,
given the data] error recently:
Error in plot.window(xlim, ylim, log, asp, ...) :
Logarithmic axis must have positive limits
After some digging I realized what was going on:
x <- c(10460.97, 10808.67, 29499.98, 1, 35818.62, 48535.59, 1, 1,
42512.1, 1627.39, 1, 7571.06, 21479.69, 25, 1, 16143.85, 12736.96,
2010 May 12
2
Whiskers on the default boxplot {graphics}
How are the lower/upper whiskers defined in the default version of boxplot {graphics}?
I tried help(boxplot) and searching www.rseek.org, but I was unable to determine an absolute answer.
I checked out the definition of boxplot according to Wikipedia (http://en.wikipedia.org/wiki/Box_plot), but it also had several approaches
listed for how the whiskers could be determined, so I'm just
2002 Jul 18
1
boxplot $conf
Hello R-Help,
Could anybody tell me how the boxplot-function calculates the upper
and
lower extremes of the notch contained in $conf which I assume is the
confidence interval? Is it reliable for data which is not normally
distributed? If not, how can I calculate and boxplot a specific
confidence interval for not normally distributed data in R (increasing
the sample size does not normalize the
2005 Jul 10
2
Boxplot in R
I am trying to draw a plot like Matlab does:
The upper extreme whisker represents 95% of the data;
The upper hinge represents 75% of the data;
The median represents 50% of the data;
The lower hinge represents 25% of the data;
The lower extreme whisker represents 5% of the data.
It looks like:
--- 95%
|
|
------- 75%
| |
|-----| 50%
| |
| |
-------
2007 Apr 06
5
Labelling boxplot with fivenumber summary
I am very new to R so forgive me if this seems basic but I have done extensive searching and failed to come up with the answer for myself.
I am trying to label a boxplot I have created with the values for the median, upper and lower quartiles and max and min values. I have been unable to do this or find anything on the net to say how it might be done. Is this possible and if so how? Regards,