Displaying 15 results from an estimated 15 matches similar to: "Help reproducing a contour plot"
2012 Sep 07
7
Producing a table with mean values
Hi All,
I have a data set wit three size classes (pico, nano and micro) and 12
different sites (Seamounts). I want to produce a table with the mean and
standard deviation values for each site.
Seamount Pico Nano Micro Total_Ch
1 Off_Mount 1 0.0691 0.24200 0.00100 0.31210
2 Off_Mount 1 0.0938 0.00521 0.02060 0.11961
3 Off_Mount 1 0.1130 0.20000 0.06620 0.37920
4 Off_Mount 1
2012 Sep 11
4
Maintaining specific order when using aggregate or change order on axis
Hi All,
I'm using the following code to produce some stacked bar graphs.
*setwd("C:\\Users\\Tinus\\Documents\\NMMU\\R\\Seamounts")*
*SChla <- read.csv("SM_Chla_data.csv")*
*
*
*#Extract mean values from data file*
*
*
*Coral <- SChla[185:223,] #Reduce SChla to Coral only*
*coral <- with(Coral , aggregate(cbind(Pico, Nano, Micro),
list(Depth),FUN=mean))*
1998 Nov 16
1
PB Mandeville can't be reached
# Peter B. Mandeville kindly offered to send me code for Hotelling's T^2
# Test. Unfortunately there seems to be no route to his machine.
# So i'm trying to reach him via the Mailing List.
------------------------------------------------------------------------
Sir,
this morning i recieved your message about the availability of the code
for Hotelling's Test. I hurried to find out
2006 Nov 03
4
read file problem
R-help,
I have the following file I want to import to R (some lines
removed)
Calibrated CTD data for station:00280001
Calibrated:23/8 2001, Salinity Unsmoothed, Fluorescence Uncalibrated
Maximum observed depth: 36 m
QUAL has one digit for each of pressure, temp., sal. and fluor.
QUAL=1:Uncal., QUAL=2:OK, QUAL=6:Interp., QUAL=9:No data
1998 Nov 16
0
Re: Hotelling corrected
By accident, I left out the lines defining n1 and n2. Here it is as a
function.
Peter B.
hotelling <- function(d1,d2){
k <- ncol(d1)
n1 <- nrow(d1)
n2 <- nrow(d2)
xbar1 <- apply(d1,2,mean)
xbar2 <- apply(d2,2,mean)
dbar <- xbar2-xbar1
v <- ((n1-1)*var(d1)+(n2-1)*var(d2))/(n1+n2-2)
t2 <- n1*n2*dbar%*%solve(v)%*%dbar/(n1+n2)
f <-
2005 Jun 21
1
test for equality of two data sets with multidimensional variables
Hello there,
I have two data sets with 14 variables each, and wish to do the test
for equality of their covariance matrices and mean vectors. Normally
these tests should be done by chi square test (box provided) and
Hotelling's T square test respectively. Which R functions could do
this kind of test? I just find some functions could do for one
dimension, but no for multidimension. Some one
2011 Sep 02
5
Hessian Matrix Issue
Dear All,
I am running a simulation to obtain coverage probability of Wald type
confidence intervals for my parameter d in a function of two parameters
(mu,d).
I am optimizing it using "optim" method "L-BFGS-B" to obtain MLE. As, I
want to invert the Hessian matrix to get Standard errors of the two
parameter estimates. However, my Hessian matrix at times becomes
2019 May 06
4
Proposal to add preprocessor warning for unused command line macros
This is a proposal for either adding a new, or updating an existing
command line option such that a diagnostic can optionally be produced
for unused -D macros.
Long-lived large projects with thousands of files and many
contributors have a tendency to accumulate build options over time. As
time passes some build options like macros become replaced, obsolete,
or simply no longer used.
At the same
2002 Jan 23
3
MANOVA extension of paired t-test?
I would like to test the hypothesis that the difference between pairs, for
several variables, is zero. This is easily done separately for each
variable with:
lm(Y ~ rep(0, nrow(Y)))
where Y is a matrix whose columns are the differences for each variable
between pair members.
However, I would like to get an overall probability across all variables
from a Wilks or Pillai-Bartlett statistic as in
2007 May 21
0
How to conduct a hypothesis test : Ho:|E(X)|=|E(Y)|<->H1:otherwise NOT R question
Dear R-list,
I am sorry for my shortage of stat knowlege. I want know how to conduct a
hypothesis test : Ho:|E(X)|=|E(Y)|<->H1:otherwise.
Actually, in my study, X and Y is two observations of bias,
where bias=u^hat-u, u is a parameter I concerned. Given X=(u^hat_xi - u) and
Y=(u^hat_yi - u), I want to know which bias is smaller, or the absolute
expection of which is smaller. Due to limit
2003 Oct 18
2
Oceanographic lattice plots?
R 1.8.0 on Windows XP Professional. A huge THANK YOU to the R Team for
this marvelous software.
I am making lattice plots of oceanographic data. The usual layout does not
conform to plotting conventions that marine scientists use when depth is
the independent variable. Under those conventions, plots are made with the
origin at the upper left, depth on the vertical axis (increasing as it
2020 Feb 04
2
RFC: Add a preprocessor to yaml2obj (and other YAML tools)
?The idea itself is indeed good.
Regarding to escaping: I think we should have it.
Imagine the following example (I've took it from D73828).
--- !ELF
FileHeader:
Class: ELFCLASS[[BITS]]
Data: ELFDATA2LSB
Type: ET_EXEC
Machine: EM_386
# RUN: yaml2obj %s --docnum=4 -D BITS=32 -o %t-32bit.o
# RUN: yaml2obj %s --docnum=4 -D BITS=64 -o %t-64bit.o
Without escaping it would
2020 Feb 03
2
RFC: Add a preprocessor to yaml2obj (and other YAML tools)
I am adding -D k=v to yaml2obj, similar to clang -D. This makes it easy
to generate {32-bit,64-bit} x {big-endian,little-endian} tests.
--- !ELF
FileHeader:
Class: ELFCLASS[[BITS]]
Data: ELFDATA2[[ENCODE]]
Type: ET_DYN
Machine: EM_X86_64
# RUN: yaml2obj -D BITS=32 -D ENCODE=LSB %s -o %t.32le
# RUN: yaml2obj -D BITS=32 -D ENCODE=MSB %s -o %t.32le
# RUN: yaml2obj
2007 Feb 27
14
Stop browser from "form filling" fields.
Hi all,
I have a user login form which the browser keeps populating because of
its form fill feature. So when anyone goes to log in it shows the
previous login''s username and password. How can I stop the browser
from populating a text field?
Thanks in advance.
Cheers,
Diego
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2018 Jan 16
1
Letters group Games-Howell post hoc in R
Hello everybody,
I use the sweetpotato database included in R package:
data(sweetpotato) This dataset contains two variables: yield(continous
variable) and virus(factor variable).
Due to Levene test is significant I cannot assume homogeneity of variances
and I apply Welch test in R instead of one-way ANOVA followed by Tukey
posthoc.
Nevertheless, the problems come from when I apply posthoc