Displaying 20 results from an estimated 10000 matches similar to: "Adding math symbols to axis labels"
2009 Jun 16
2
Statistically detecting thresholds...
Rers:
I have some ecological data (stream velocity vs. % cover of submerged
weeds) that shows strong evidence of a thresholding step-function, e.g.
below some velocity, % cover ranges from 0% to 100% (with no apparent
relationship to velocity within this range of velocities), but above a
certain "threshold" velocity, the % cover does not appear to exceed,
say, 10%. There are good
2010 Jan 17
2
For loops in R
Hello.
I've just started using R and am trying to figure out if the two codes
snippets below have the same output
gBest<-floor(runif(popsize,min=1,max=top))
velocity[i,j]<<-.4* velocity[i,j] + 1 * runif(1) * (pbestsVar[i,j] -
popVar[i,j]) + 1 * runif(1) * (archiveVar[gBest,j] - popVar[i,j])
and
for (i in 1:popsize) {
for (j in 1:maxvar) {
gBest<-sample(top,size=1)
2006 Jun 10
1
Math symbols for labels in Perspective plots
Hi ..
I would like to have math symbols in perspective plots
i tried : persp(x,y,z,xlab=expression(phi))
but it plots it as phi.
Thanks.
Harsh
__________________________________________________
[[alternative HTML version deleted]]
2011 Mar 18
1
predict lm doubt
Hello,
does anyone knows this predict is not resulting?
# lm predict
dfTestes3sitesCriptic$Velocity_corrected <- ifelse
(dfTestes3sitesCriptic$Season == "A" & dfTestes3sitesCriptic$BeforeAfter ==
"Before", (dfTestes3sitesCriptic$Velocity * mVel3ABefAfter), (ifelse
(dfTestes3sitesCriptic$Season == "Sp" & dfTestes3sitesCriptic$BeforeAfter ==
2008 Jul 01
2
Graph Order in xyplot
I have constructed a Trellis style xyplot.
lengthf <- factor(length)
xyplot(SLI$velocity ~ SLI$width | SLI$lengthf, layout = c(2,7), xlab =
"Width (cm)", ylab = "Velocity (m/s^2)", col = "black")
This produces a lovely little plot. However, the grouping factor(lengthf)
isn't in the right order. My values range from 2-28 and the 2 graph on the
bottom left and
2009 Jun 17
2
Difference beetwen element in the same column
Hi, i have this file
pressure,k,eps,zeta,f,velocity:0,velocity:1,velocity:2,vtkValidPointMask,Point
Coordinates:0,Point Coordinates:1,Point Coordinates:2,vtkOriginalIndices
0.150545,0.000575811,0.0231277,0.000339049,-0.0193008,0.00318629,-6.24066e-07,5.39599e-05,^A,7,0,0,0
0.150546,0.000782719,0.0226157,0.000497957,-0.0192084,0.00367781,5.09813e-06,5.90689e-05,^A,7,0.0003035,0.000225,1
2005 May 24
1
How to get special (Hershey) font symbols into plot axis labels? [Revisited]
Dear R users,
I would like to use sub- and super-script in axis labels. I assume this
is best done using Hershey symbols. When trying to find information on
using Hershey font symbols in axis labels, I came across the following
discussion thread:
http://maths.newcastle.edu.au/~rking/R/help/02a/1857.html
Have Hershey font implementations moved on since then?
Thanks,
Sander.
--
2003 Sep 26
3
Std. errors of intercept and slope
Dear all,
I have the following output generated by linear regression. Since there is
only one regression intercept and one slope for one set of data, what is the
meaning of std. error for intercept and that of slope? Thanks in advance.
Sincerely,
Minghua
> data(thuesen)
> attach(thuesen)
> lm(short.velocity~blood.glucose)
Call:
lm(formula = short.velocity ~ blood.glucose)
2012 Feb 29
2
function for filtering and deleting vector entries
Dear helpers
I have two data sets saved as vectors (temperature and velocity). Now I need
to "take out" a span of temperature and its corresponding velocity in the
other vector. How can I achieve that?
I tried to write a function,which takes a vector entry and then decides
wether to delete the temperature entry or not and simultaneously doing so
with same entry in the velocity
2006 Jul 16
2
CFD Plots in R and Other Things
Dear All,
I am getting some data from fluid dynamics simulations (air mixing in
a pipe, 2D axial symmetry, geometry described by a radial coordinate r
and an axial coordinate z) which I'd like to plot and analyze with R.
Think about slicing the cylinder along its axial direction to get a
set of cross sections which are orthogonal to the z axis.
For each section, I have a set of velocity
2010 Feb 16
1
RODBC missing values in integer columns
Hello,
We are having some strange issues with RODBC related to integer columns.
Whenever we do a sql query the data in a integer column is 150 actual data
points then 150 0's then 150 actual data points then 150 0's. However, our
database actually has numbers where the 0's are filled in. Furthermore,
other datatypes do not have this problem: double and varchar are correct and
do not
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
2009 Oct 19
1
How do I wrap a long mixed text/math expression in an axis label?
I would like to wrap a y-axis label onto two lines. My label is an expression
containing both text and math symbols. I have looked at plotmath,
strsplit(), strwrap(), deparse(), do.call(), substitute() and bquote().
Based on previous posts, I can get plain text to wrap. However, when I try
these methods on my label, the exact string is returned, rather than
evaluating the math symbols.
My
2009 May 03
12
DNAT Question
Hi list,
I have a shorewall installed on 2 interfaces which also has multiple
static public IP. Let''s say I have 1.2.3.4 and 1.2.3.5. I have assigned
nat with:
1.2.3.4 eth0 11.22.33.4 no no
But then I have a situation where I need 11.22.33.44 to connect to a
host in the net zone and appears also to be 1.2.3.5 not only 1.2.3.4.
How to do it? TIA
Willy
2004 Sep 03
1
new user and non parametric test
Hi *
i'm trying to do my statistical analysis with R (on a debianGNULinux)
i've installed R and now i'll try to import my data from .xls
Where to search for non parametric test in R ?
I'm studing neurons velocity and i've to check if after the perfusion
with a factor x the velocity changes but as my variable is not normally
ditributed i've to try with non parametric
2008 Sep 09
1
Linear Modeling the best alternative
I have a data set of mean velocity, discharge, and mean depth. I need
to find out which model best fits them out of log linear, linear, some
other kind of model... Using excel I have found that linear is not
that bad and log10(discharge) vs. the other two variables (I am trying
to predict velocity and depth from discharge) is not that bad either.
How do I test and see which one of these models
2007 Oct 19
2
In a SLR, Why Does the Hat Matrix Depend on the Weights?
I understand that the hat matrix is a function of the predictor variable
alone. So, in the following example why do the values on the diagonal of the
hat matrix change when I go from an unweighted fit to a weighted fit? Is the
function hatvalues giving me something other than what I think it is?
library(ISwR)
data(thuesen)
attach(thuesen)
fit <- lm(short.velocity ~ blood.glucose)
2019 Apr 23
3
SolrCore 'dovecot' is not available due to init failure: fieldType 'text_general' not found in the schema
https://wiki.dovecot.org/Plugins/FTS/Solr
Only offers a solr-7.7.0 solrconfig.xml, does it apply to solr-8.0.0?
On Tue, Apr 23, 2019 at 11:18 AM luckydog xf <luckydogxf at gmail.com> wrote:
> Here is solrconfig.xml, I removed comments.
> --------------------
>
> <?xml version="1.0" encoding="UTF-8"?>
> <config>
>
2018 Feb 06
1
gdistance::shortestPath throws error "not a symmetric matrix"
Hi,
Calling
gdistance::shortestPath
gives me the error
Error in asMethod(object) :
not a symmetric matrix; consider forceSymmetric() or symmpart()
The output of dput(.traceback()) is
pairlist("stop(\"not a symmetric matrix; consider forceSymmetric() or symmpart()\")",
"asMethod(object)",
"as(Laplacian,\"symmetricMatrix\")",
2004 May 03
1
circular correlation
I have a problem that deals with correlating wind velocity to seed
collection data. The problem lies in that I have a wind data set that
is contains 2000+ data points and weed collection data on the order of a
couple hundred. Both data sets were collected for the same time period,
but there is not a one-to-one wind velocity->seed location match. My
understanding of correlation is that you