Displaying 20 results from an estimated 3000 matches similar to: "Boxplots using percentiles?"
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
2005 Oct 04
6
boxplot statistics
I have read and reread the boxplot and the boxplot stats page, and I
still cannot understand how and what boxplot shows. I realize that
this might be due to me not knowing enough statistics, but anyway...
First, how does boxplot determine the size of the box? And is the line
inside the box the mean or the median (or something completely
different?) And how does it determine how long out the
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
2009 Jul 12
2
box and whisker (PR#13821)
In a Box and Whisker plot, I thought that when there are outliers both abov=
e and below the whiskers, then the whiskers should both be the same length =
(plus or minus 1.5 times the inter-quartile range).
If you look at the plot for SilwoodWeather on p.155 of The R Book you will =
see that for November (month =3D 11) the upper whisker is shorter than the =
lower, while for other months with
2011 Feb 24
1
Boxplot not doing what I think it should
My box plot below is drawing its upper whisker all the way to the last point, instead of showing the point as an outlier. Am I misunderstanding, or is it a bug?
Help(boxplot) states for the parameter ?range? that ?this determines how far the plot whiskers extend out from the box. If range is positive, the whiskers extend to the most extreme data point which is no more than range times the
2010 Jun 04
1
Boxplot: what is shown by default?
hi,
i'm using /"boxplot()"/ to show some data:
x <- c(0.99, 0.97, 0.91, 0.72, 1.00, 0.99, 1.02, 0.90, 0.91, 0.90, 1.02,
0.90, 1.35, 1.01, 0.92)
boxplot(x)
is it correct when i say: /"Boxes represent interquartile ranges (IQRs);
bold horizontal lines, medians; whiskers, lowest and highest values
still within 1.5 x IQR; open circles, outliers."?
/thanks in advance
2005 Oct 18
1
A two-part question about box-percentile plots, bpplot(): (1) yaxt="n" doesn't seem to work (2) how to display mean values
Dear List,
I have a two-part question related to bpplot(), a box-percentile plot
function in the Hmisc package.
Take the example given in the Help for bpplot(), for instance.
(1) How does one set but not draw the y-axis? What I did was,
bpplot(... , yaxt="n"), but that apparently does not work (though it
works for boxplot()).
(2) How does one display the mean value of each variable
2003 Jan 29
2
calling sweave function from latex
System info:
Mandrake 9.0
R Version 1.6.1
ESS 5.1.21
Emacs 21.2.1
-------------------
Colleagues
I've been calling R-code embedded in my LaTex document using Sweave, but
would like to make things more convenient. At present as I understand it
you first process the R chunks of code using the Sweave function
called from within R to process a "precursor file" e.g. foo.sw to get a
2003 Jan 29
2
calling sweave function from latex
System info:
Mandrake 9.0
R Version 1.6.1
ESS 5.1.21
Emacs 21.2.1
-------------------
Colleagues
I've been calling R-code embedded in my LaTex document using Sweave, but
would like to make things more convenient. At present as I understand it
you first process the R chunks of code using the Sweave function
called from within R to process a "precursor file" e.g. foo.sw to get a
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 -
2008 Apr 11
2
Questions related to plotting boxplots of time series data
List,
I have looked through several R books and searched the web to find
answers to my questions with no results. I have a ensembles of time
series data (essentially from Monte Carlo simulations) which I would
like to summarize as a time series of boxplots. I don't know how to do
this and I am not sure how I should structure the data to get what I
want. Another related question: while
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
2006 Apr 02
2
Boxplot
bonjour,
je voudrais savoir s'il serait possible de sugg?rer aux d?veloppeurs
de R de proposer une option suppl?mentaire pour les moustaches, ?
savoir les placer sur d1 et d9 comme c'est pr?conis? dans les
programmes du secondaire en France, option du style boxplot
(serie,range=91) par exemple...
i would like to know if it is possible to have (with the agrement of
developpers)
2008 May 16
1
Lattice box percentile plot
Dear Nabble.
I am trying to draw a box percentile plot with trellis using the panel in
Hmisc. I really want to colour the plots in. I can alter several of features
of the plot by changing the trellis par settings but I just can’t fill the
shape in.
Here is some example code which alters line colour and dot symbol:
require(lattice)
require(Hmisc)
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
2007 Feb 12
6
Boxplot: quartiles/outliers
For boxplot(), is it possible to pass in a parameter to change the default
way that the 1st and 3rd quartiles are computed? (specifically, I'd like to
use type 6 described in the quantile function).
Also, what are the options for how outliers are computed, and how can one
change them?
Thank you
[[alternative HTML version deleted]]
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)
2010 Dec 17
3
box-and-whisker plots based on summary not data
Hi,
Is it possible to produce box-and-whisker plots given that I have the
median, interquartile and 5/95th centile values, but not the data from
which they come? It seems that it ought to be possible to coerce bxp
to do what I want, but I can't quite see how.
Thanks,
Matthew
--
Matthew Vernon, Research Fellow
Ecology and Epidemiology Group,
University of Warwick
2000 Dec 10
1
more boxplot questions
Hello,
I have a couple more questions about boxplots. In the books I've read on
statistics (I'm not a statistics expert but just a poor engineer trying
to help his wife with the analysis of the data she gathered for her
medieval history PhD), I seen two kinds of box plots: one using
quartiles to determine the height of the rectangles and whiskers which
is what the standard R boxplot does,