Analysis of Dose-Response Curves.
Analysis of dose-response data is made available through a suite of flexible and versatile model fitting and after-fitting functions.
Questions tagged [drc]
84 questions
0
votes
1 answer
R, drc package's drm() function display negative hillslope. even though the graph describe to increasing feature
I used to analysis the results by GraphPad Prism. these days I try to analysis by using R & drc packages.
When I try drm(...., fct.LL4()) I find the hill slope (b factor) is negative value even though the graph is increasing.
Surprisingly the…
Cato
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- 2
0
votes
1 answer
No glance method for objects of class drc error
I am trying to fit growth models on longitudinal data using the Gompertz function in the drc package. To generate models on several countries simultaneously, I nested the data and used the map function from tidyverse. The modeling step using…
0
votes
1 answer
How to specify all levels for R{stats} predict() function in non linear mixed model after model fit with package medrc
I have 3 trials (trial: e1, e2, e3), 2 products/trial (products: A, B), 5 rates/product (.1,1,10,100,1000), total of 6 curves (curve: c1,...,c6).
After fitting a non linear mixed model, I want to plot all the curves and the curves resulting from the…
Danilo G.
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- 7
0
votes
1 answer
Calculating ED50 in LL.4 model (drc package)
I have a dataset with conccentrations, mycelium growth and two populations. I fitted LL.4 model (checked with mselect)
##LL.4 model of the data
FD7_LL4<-drm(Growth ~ Concentration, Treatment, data=FD7,
fct = LL.4(),
pmodels=list(~Treatment-1,…
0
votes
1 answer
Call a function argument stored in a list
I need to test a suite of argument conditions in order to find the best model (using the drc package). That is, I'd like to store function arguments in a list and then call them into the drm() function. The drc package has a function (mselect()) to…
TheSciGuy
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0
votes
0 answers
Unnest nested tidydrc models
Problem
I've been using a tidy wrapper for the drc package—tidydrc— to build growth curves which produces a tidy version of the normal output (best for ggplot). However, due to the inherit nesting of the models, I can't run simple drc functions…
TheSciGuy
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- 22
0
votes
2 answers
Apply string values from a list to a default drc function
I'm running several models and functions with the models. I need to apply values from a list to a default R function, e.g., modelFit()
My idea is to run the same function to several models and compile the results after.
I'm trying to use loops and…
Danilo G.
- 80
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- 7
0
votes
1 answer
Best way to calculate the IC50 with limit contraints in drc::drm()
I have a data like this
df<- structure(list(Conc = c(0.03125, 0.0625, 0.125, 0.25, 0.5, 1,
0.03125, 0.0625, 0.125, 0.25, 0.5, 1, 0.03125, 0.0625, 0.125,
0.25, 0.5, 1, 0.03125, 0.0625, 0.125, 0.25, 0.5, 1, 0.03125,
0.0625, 0.125, 0.25, 0.5, 1,…
Learner
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- 15
0
votes
1 answer
"Undefined columns selected" error message but head(data) shows names?
I am trying to work through some example code from a published paper and uploaded dataset. The data and code is from the package drcSeedGerm
I am trying to run this sample…
Phyto
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- 2
0
votes
1 answer
Implementing Draco 3D data Compression in Angular 7 to compress .STL files?
Is there any possible way to implement Draco 3D compression in Angular 7?
or suggest me with some examples.
Thanks.
aryaa
- 67
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- 10
0
votes
0 answers
R: functionalizing ggplot workflow (drc modelling) leads to error
I have a particular ggplot workflow, which I have to stick to due to constraints in the drc package (Christian Ritz), so the workflow is in a way non-standard.
Functions used in this…
Deb.M
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- 8
0
votes
1 answer
Error when re-arranging data for fitting the event-time model
I have mean germination data (3 replicates of n=50 seeds each) that I am re-arranging to fit the event-time model in R package DRC (Ritz et al. 2013). Some of my counts become negative which I think is why when I try to use the drm function I get an…
Dustin
- 183
- 7
0
votes
1 answer
What is pmodels in drc package
Sorry if it's a dumb question, but I am having trouble figuring out how to use pmodels in the drc package. I've searched everywhere online and all I can find is the definition, which is: "a data frame with a many columns as there are parameters in…
TW Wong
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- 1
0
votes
1 answer
R package NAMESPACE
I am documenting an R function. The structure of my R file is as below:
#'Report the modeling result
#'
#' @param higher_rank A string.
#' @param lower_rank A string.
#' @param method A string.
#' @return modeling result of the accumulation of…
yearntolearn
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0
votes
1 answer
How to plot a model drc package?
Script:
lettuce
m0<-drm(weight~conc, data = lettuce, fct = LL.3())
summary(m0)
modelFit(m0)
plot(m0)
I want to know how to plot the exact value of conc in the axis x with their corresponding value in y and how to plot the (r²).
