Displaying 20 results from an estimated 1100 matches similar to: "boxplot, notches, etc."
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,
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
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.
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
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
2006 Feb 26
2
How to produce notches in bwplot?
Dear r-helpers,
tst <- data.frame(as.numeric(x <- 1:20), f <- rep(c('hi','lo'), times
= 10))
with(tst, bwplot(f ~ x, panel = function(x, y){panel.bwplot(x, y, pch
= '|', stats = boxplot.stats, fill = 8, varwidth = T)}))
I can't figure out from the documentation how to tell stats that I
would like to see notches or (even bands).
Here is what I've
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 Oct 08
1
Strange horns on notched box plots
Hi I'm getting a weird result when I try to switch from a normal box
plot to a notched one. The ends of the box fold down toward the
median giving a horned appearance. Is just the sample itself? It is
small, but the un-notched plot looks okay. Anyway to fix this?
e7=as.vector(c(234,37,98,116,47))
boxplot(e7, plot=TRUE, notch=TRUE)
Thanks very much.
2010 Feb 18
2
Error message when using error.bars(x,add=TRUE)
Hey hey,
I`m analyzing a data set containing the element contentrations of various
samples...
I wanted to construct notched boxplots and got quite ugly results for some
of the boxplots. The notches are often larger then the hinges which resulted
in weird looking edges (even though I`m using a log-boxplot). To avoid this
problem I thought about using "normal" log-boxplots and adding some
2009 Sep 29
2
ggplot2 box plot notches
Dear List,
I just googled to find out if notched box plots are possible with
ggplot2, but couldn't find a answer to it.
boxplot() has the option: notch = TRUE, e.g.: boxplot(mpg$hwy, notch=TRUE)
My example code (taken from the net) is:
require(ggplot2)
qplot(class, hwy, fill=factor(year), data=mpg, geom="boxplot",
position="dodge")+theme_bw()
Thank you for you help!
2009 Mar 25
1
boxplot in subgroups
Hi,
I have data that looks like this:
ASA1 ASA2 C1_C2
C M 9.0225
S S 2.4315
M C 3.4894
M S 4.5282
C M 1.3183
C S 1.3735
S C 1.0488
S M 7.948
M C 4.5827
I need to plot Boxplots for a given ASA1 (either C,S, or M) with
respect to C1_C2. However, instead of one boxplot I want to plot
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
2010 Oct 11
1
MATLAB vrs. R
I need to find the area under a trapezoid for a research-related project. I was able to find the area under the trapezoid in MATLAB using the code:
function [int] = myquadrature(f,a,b)
% user-defined quadrature function
% integrate data f from x=a to x=b assuming f is equally spaced over the interval
% use type
% determine number of data points
npts = prod(size(f));
nint = npts -1; %number of
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.
2006 Jan 08
1
confint/nls
I have found some "issues" (bugs?) with nls confidence intervals ...
some with the relatively new "port" algorithm, others more general
(but possibly in the "well, don't do that" category). I have
corresponded some with Prof. Ripley about them, but I thought I
would just report how far I've gotten in case anyone else has
thoughts. (I'm finding the code
2018 Mar 21
1
Plotting Notched Box Plots Log Scale - Losing bottom portion of box plot
Hello,
I'm using the code below to generate some notched box plots. The issue is
whenever I use log scale, the sides of the bottom part of the box plots
don't plot. I've tried it in RStudio Ver 1.1.419 and R version 3.4.3 and I
get the same result.
The code and link to my data is below.
Thank you for your time
David
MyData <-
2011 Oct 04
1
a question about sort and BH
Hi,
I have two questions want to ask.
1. If I have a matrix like this, and I want to figure out the rows whose
value in the 3rd column are less than 0.05. How can I do it with R.
hsa-let-7a--MBTD1 0.528239197 2.41E-05
hsa-let-7a--APOBEC1 0.507869409 5.51E-05
hsa-let-7a--PAPOLA 0.470451884 0.000221774
hsa-let-7a--NF2 0.469280186 0.000231065
hsa-let-7a--SLC17A5
2006 Jan 19
1
nls profiling with algorithm="port" may violate bounds (PR#8508)
[posted to R-devel, no discussion:
resubmitting it as a bug, just so it gets
logged appropriately]
Sorry to report further difficulties with
nls and profiling and constraints ... the problem
this time (which I didn't check for in my last
round of testing) is that the nls profiler doesn't
seem to respect constraints that have been
set when using the port algorithm.
See test code
2010 Oct 08
1
Trapezoid Rule
Dear R Users,
I've never used R before and my professor has asked us to do some
pretty intense programming (or it's intense to me at least). Here is
the question: Modify the function myquadrature inside the script so
that it returns the quadrature of descrete data using the trapezoidal
rule. Modify the call to the function at the bottom of the script so
that is uses your modifies
2005 Jan 12
4
Finding seasonal peaks in a time series....
I have a seasonal time series. I want to calculate the annual mean
value of the time series at its peak
(say the mean of the three values before the peak, the peak, and the
three values after the peak).
The peak of the time series might change cycle slightly from year to year.
# E.g.,
nPts <- 254
foo <- sin((2 * pi * 1/24) * 1:nPts)
foo <- foo + rnorm(nPts, 0, 0.05)
bar <- ts(foo,