Displaying 20 results from an estimated 84 matches for "toxically".
2010 Oct 04
2
Plot for Binomial GLM
Hi i would like to use some graphs or tables to explore the data and make
some sensible guesses of what to expect to see in a glm model to assess if
toxin concentration and sex have a relationship with the kill rate of rats.
But i cant seem to work it out as i have two predictor
variables~help?Thanks.:)
Here's my data.
>
2011 Aug 04
1
Multiple endpoint (possibly group sequential) sample size calculation
Hello everyone,
I need to do a sample size calculation. The study two arms and two endpoints. The two arms are two different cancer drugs and the two endpoints reflect efficacy (based on progression free survival) and toxicity.
Until now, I have been trying to understand this in terms of a one-arm design, where the acceptable rate of efficacy might be 0.40, the unacceptable rate of efficacy
2009 Feb 20
0
Spearman-Karber method for toxicity data
Dear all,
I tried help.search("karber") and RSiteSearch("karber") and RSiteSearch("*karber*") to find whether the (trimmed) Spearman-Karber method for LD50 evaluation in toxicity data (e.g. according to Hamilton 1977) has been implemented in R. Or does this method feature under a different name? Of course logit and probit are doable, but Spearman-Karber seems to
2012 Jan 13
0
New package ‘bcrm’ to implement Bayesian continuous reassessment method designs
Dear R users,
I am pleased to announce the release of a new packaged called `bcrm?
(version 0.1), now available on CRAN.
The package implements a wide range of Bayesian continuous reassessment
method (CRM) designs to be used in Phase I dose-escalation trials. The
package is fully documented and highlights include
? A choice of 1-parameter working models or the 2-parameter logistic
model.
2012 Jan 13
0
New package ‘bcrm’ to implement Bayesian continuous reassessment method designs
Dear R users,
I am pleased to announce the release of a new packaged called `bcrm?
(version 0.1), now available on CRAN.
The package implements a wide range of Bayesian continuous reassessment
method (CRM) designs to be used in Phase I dose-escalation trials. The
package is fully documented and highlights include
? A choice of 1-parameter working models or the 2-parameter logistic
model.
2007 Apr 23
1
data recoding problem
Hi R experts,
I have a data recoding problem I cant get my head around - I am not that
great at the subsetting syntax. I have a dataset of longitudinal
toxicity data (for multistate modelling) for which I want to also want
to do a simple Kaplan-Meier curve of the time to first toxic event.
The data for 2 cases presently looks like this (one with an event, the
other without), with id representing
2004 Apr 26
2
Looking for help in calculating percentiles
Hi All:
I am working with a dataset on Arsenic toxicity, and I am trying to
calculate the 20th, 40th, 60th, 80th, and highest percentiles for a
variable, dietary Moisture (variable name dMoist).
The inbuilt function quantile(dMoist) would print 0, 25th, 50th, 75th, and
100th percentile. Does there exist a function that can calculate xth
percentile (where x = 10th, 20th, ... etc) values?
2009 Jul 28
5
Summarising Data for Forrest Plots
I tried to post this a few times last week and it seems to have got stuck somehow so I'm trying from a different email in the hope that works. If somehow this has appeared on the list 20 tiems and I never saw any of them I apologize ;-)
I'm basically an R-newbie. But I am VERY computer literate. But this has me stumped...
All the examples for using the rmeta package to create a
2010 May 02
2
Calculation error
Dear Rxperts,
Running the following code:
=======================================================
twlo=10; twhi=20; wt=154; vd=0.5; cl=0.046; tau=6; t=3; F=1;
wtkg <- wt/2.2 # convert lbs to kg
vd.pt <- wtkg * vd # compute weight-based vd (L)
cl.pt <- wtkg * cl # compute CL (L/hr)
k <- cl.pt/vd.pt # compute k (hr^-1)
cave <-
2012 Oct 18
3
svyplot and svysmooth with hexbin
Hi all-
So sorry to bother you all with something pretty basic.
I am trying to add the lines method output from svysmooth to a svyplot with style="grayhex". However, the line either appears in the wrong place or if I am running in R Studio it causes the system to crash.
I know this is something to do with Lattice graphics, but for the life of me I can not figure out how. Dr. Lumley
2011 Jul 12
16
The Witcher
hi! i have a small problem with the game, my energy is black and toxicity too.
Can you help me?
2008 Aug 22
1
Help on competing risk package cmprsk with time dependent covariate
Dear R users,
I d like to assess the effect of "treatment" covariate on a disease relapse risk with the package cmprsk.
However, the effect of this covariate on survival is time-dependent
(assessed with cox.zph): no significant effect during the first year of follow-up,
then after 1 year a favorable effect is observed on survival (step
function might be the correct way to say that ?).
2012 Feb 13
2
finding and describing missing data runs in a time series
Hi -
I am trying to find and describe missing data in a time series. For instance, in the library openair, there is a data frame called "mydata":
library(openair)
head(mydata)
date ws wd nox no2 o3 pm10 so2 co pm25
1 1998-01-01 00:00:00 0.60 280 285 39 1 29 4.7225 3.3725 NA
2 1998-01-01 01:00:00 2.16 230 NA NA NA 37 NA NA NA
3 1998-01-01 02:00:00
2022 Sep 16
4
Fwd: [networkupstools/nut] Hide 'Init SSL without certificate database' message for upsc (PR #1662)
Hello all,
Here's a PR I want to ask community about: should NUT clients like upsc
report (log!) or hide the infamous 'Init SSL without certificate database'
message?
On one hand, it is a reminder that the setup is insecure (plaintext
protocol, might be in an externally provided tunnel but we don't know
that). On another, it is fairly annoying and if it does clutter
2022 Sep 16
4
Fwd: [networkupstools/nut] Hide 'Init SSL without certificate database' message for upsc (PR #1662)
Hello all,
Here's a PR I want to ask community about: should NUT clients like upsc
report (log!) or hide the infamous 'Init SSL without certificate database'
message?
On one hand, it is a reminder that the setup is insecure (plaintext
protocol, might be in an externally provided tunnel but we don't know
that). On another, it is fairly annoying and if it does clutter
2007 Sep 11
0
scuba 1.1-8
Version 1.1-8 of package 'scuba' has been uploaded to CRAN.
'scuba' is a package for scuba diving calculations and decompression
models. It supports dive profiles (tables, plotting etc), analysis of dive
profiles using decompression models, gas toxicity calculations, and gas
usage calculations.
New features in version 1.1-8:
. support for dive profiles uploaded from a dive
2012 May 02
0
bcrm package update
Dear all,
Version 0.3 of the bcrm package is now available on CRAN. The package
allows users to fit Bayesian Continuous Reassessment Method Phase I
trial designs. This version has the following new developments from
version 0.1:
* Stopping rules have been added, allowing stopping to be based on a
maximum sample size, the maximum number to be treated at the final MTD
estimate, the precision
2012 May 02
0
bcrm package update
Dear all,
Version 0.3 of the bcrm package is now available on CRAN. The package
allows users to fit Bayesian Continuous Reassessment Method Phase I
trial designs. This version has the following new developments from
version 0.1:
* Stopping rules have been added, allowing stopping to be based on a
maximum sample size, the maximum number to be treated at the final MTD
estimate, the precision
2011 Sep 30
2
isotope superscripts ggplot2
Happy Friday fellow R users.
I need some help - I am trying to make a graph using ggplot 2 of some lead isotope ratios. Normally, the isotope mass number appears as a superscript before the chemical symbol. However, I cannot figure out how to do this ggplot2's axis labels. The closest I have come is using "." In front of the numbers I am superscripting e.g:
ggplot(....
2011 Nov 10
2
ggplot2 - regression statistics how to display on plot
Hello -
So I am trying to use ggplot2 to show a linear regression between two variables, but I want to also show the fit of the line on the graph as well.
I am using ggplot2 for other graphics in what I am working on, so even though this would be a fairly easy thing to do in Excel, I would prefer to do it in R to keep my look and feel, and I think ggplot2 is just cooler.
Here is a sample