nelder_mead | A Python easy implementation of the Nelder-Mead method | Code Coverage Tools library
kandi X-RAY | nelder_mead Summary
kandi X-RAY | nelder_mead Summary
The Nelder-Mead is the one of derivative-free optimization method. This method is called simplex method or ameba method.
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- Minimize the problem
- Calculate optimal solution
- Evaluate the function
- Return the centroid of the grid
- Generate a point
- Expand a point to a point
- Return True if point is inside self
- Return the point outside of the ellipse
- Reflect a point
- Optimizes the model
nelder_mead Key Features
nelder_mead Examples and Code Snippets
Community Discussions
Trending Discussions on nelder_mead
QUESTION
I did an experiment in which people had to give answers to moral dilemmas that were either personal or impersonal. I now want to see if there is an interaction between the type of dilemma and the answer participants gave (yes or no) that influences their reaction time.
For this, I computed a Linear Mixed Model using the lmer()
-function of the lme4-package.
My Data looks like this:
ANSWER
Answered 2021-Feb-26 at 18:25You say
logRT is the average logarithmized reaction time across all those 4 dilemmas.
If I'm interpreting this correctly — i.e., each subject has the same response for all of the times they are observed — then this is the proximal cause of your problem. (I know I've seen this exact problem before, but I don't know where — here? r-sig-mixed-models@r-project.org
?)
QUESTION
newbie here
I'm trying to minimize a function in Julia with optim.jl. The function works, but when I try to optimize it it gives me this error message:
...ANSWER
Answered 2021-Jan-06 at 12:19You can replicate your error via:
QUESTION
I am trying to find how one variable (EVI
) may predict a binary outcome (an_larv_bin
) using glmer
from lme4
package. The code I input is:
ANSWER
Answered 2020-Jun-26 at 12:55data:
QUESTION
I am analysing data (included below) using lme4
's glmer
function in R.
The model I am building consists of a Poisson-distributed response variable (obs
), one random factor (area
), one continuous offset (duration
), five continuous fixed effects (can_perc
, can_n
, time
, temp
, cloud_cover
) and one binomial fixed effect factor (burnt
).
Before fitting the model I checked for collinearity and removed any collinear variables.
The initial model is:
...ANSWER
Answered 2018-Dec-21 at 20:12tl;dr This looks like a case of complete separation; you have no positive outcomes at all in your "burned" condition. You don't necessarily need to worry about this - the AIC comparisons should still be reasonably robust - but you might want to understand what's going on before you proceed. This problem (and remedies) are discussed in a relevant section of the GLMM FAQ (and there are a variety of relevant questions/answers on CrossValidated).
How do I know? Here are the coefficients:
QUESTION
Dear users of the language julia. I have a problem when using the optimize
function of the Optim package. What is the error of the code below?
ANSWER
Answered 2018-Jun-01 at 06:40The reason of your problem is that your definition of pdf_weibull
is incorrect. Here is a corrected definition:
QUESTION
I have a data frame with 5 variables: Lot / Wafer / Serial Number / Voltage / Amplification. In this data frame there are 1020 subsets grouped by Serial_number. Each subset has a certain number of measurement data points (Amplification against voltage).
I fit the data with
...ANSWER
Answered 2017-Oct-25 at 16:03The convergence warnings disappeared when I removed all data points <2. I stumbled over this by coincidence..
Probably this is somehow connected to the issue that for each subset within the range from 0 to about 50 all data points are almost exactly the same (and have values of about ~1).
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Install nelder_mead
You can use nelder_mead like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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