mystic | constrained non-convex optimization
kandi X-RAY | mystic Summary
kandi X-RAY | mystic Summary
The `mystic` framework provides a collection of optimization algorithms and tools that allows the user to more robustly (and easily) solve hard optimization problems. All optimization algorithms included in `mystic` provide workflow at the fitting layer, not just access to the algorithms as function calls. `mystic` gives the user fine-grained power to both monitor and steer optimizations as the fit processes are running. Optimizers can advance one iteration with `Step`, or run to completion with `Solve`. Users can customize optimizer stop conditions, where both compound and user-provided conditions may be used. Optimizers can save state, can be reconfigured dynamically, and can be restarted from a saved solver or from a results file. All solvers can also leverage parallel computing, either within each iteration or as an ensemble of solvers. Where possible, `mystic` optimizers share a common interface, and thus can be easily swapped without the user having to write any new code. `mystic` solvers all conform to a solver API, thus also have common method calls to configure and launch an optimization job. For more details, see `mystic.abstract_solver`. The API also makes it easy to bind a favorite 3rd party solver into the `mystic` framework. Optimization algorithms in `mystic` can accept parameter constraints, either in the form of penaties (which "penalize" regions of solution space that violate the constraints), or as constraints (which "constrain" the solver to only search in regions of solution space where the constraints are respected), or both. `mystic` provides a large selection of constraints, including probabistic and dimensionally reducing constraints. By providing a robust interface designed to enable the user to easily configure and control solvers, `mystic` greatly reduces the barrier to solving hard optimization problems. `mystic` is in active development, so any user feedback, bug reports, comments, or suggestions are highly appreciated. A list of issues is located at with a legacy list maintained at
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Top functions reviewed by kandi - BETA
- Create a hypercube
- Calculate the maximum value of a sequence
- Count the number of elements n
- Increment the value by n
- Plot a model
- Draw a contour
- Draw a trajectory
- Prepend a monitor to the end of this monitor
- Eliminate a given cutoff
- Calculate the difference between cost and cost function
- Implements expected moments
- Calculate the minimum function
- Calculate the differencing residuals
- Internal single step
- Calculate sparsity
- Minimization of fmin
- Run one step
- R impose expected standard deviation
- Minimized version of the minimum function
- Collapse a plotter
- Compute convergence
- Create a hypercube plot
- Create a hypercube from a file
- R Return the minimum value of a function
- Minimization function
- Calculate the minimum cost function
- Simplify constraints
mystic Key Features
mystic Examples and Code Snippets
Community Discussions
Trending Discussions on mystic
QUESTION
I got up and running with Visual Studio 2022 Preview for a couple of days now.
Got the first shock, there is no Startup.cs. Thats ok, a bit of reading, I know Startup is removed.
Today got another slap. I see no using statements. Here it is.
I just created a brand new .NET 6 web app and as I hover over the WebApplication class, I realized it stays in Microsoft.AspNetCore.Builder namespace. And the generated Program.cs class looks like this.
So where is the using Microsoft.AspNetCore.Builder;
statement?
Whats the magic? Why is .net becoming mystical by the day?
The full Program.cs file is as follows.
...ANSWER
Answered 2022-Mar-15 at 17:03C# 10.0 introduces a new feature called global using directive (global using ;
) which allows to specify namespaces to be implicitly imported in all files in the compilation. .NET 6 RC1 has this feature enabled by default in new project templates (see enable
property in your .csproj).
For Microsoft.NET.Sdk.Web
next namespaces should be implicitly imported (plus the ones from Microsoft.NET.Sdk
):
- System.Net.Http.Json
- Microsoft.AspNetCore.Builder
- Microsoft.AspNetCore.Hosting
- Microsoft.AspNetCore.Http
- Microsoft.AspNetCore.Routing
- Microsoft.Extensions.Configuration
- Microsoft.Extensions.DependencyInjection
- Microsoft.Extensions.Hosting
- Microsoft.Extensions.Logging
UPD
To address your questions in comment:
At the moment of writing the generated file containing default imports will be inside the obj
folder named something like ProjectName.GlobalUsings.g.cs
.
To modify default imports you can add Using
element to your .csproj
file. Based on exposed attributes it allows several actions including addition and removal:
QUESTION
I am trying to extraxt the review text from this page.
Here's a condensed version of the html shown in my chrome browser inspector:
...ANSWER
Answered 2022-Feb-24 at 08:09The element you are trying to access and to get it's text is initially out of the visible view. You have first to scroll that element into the view.
Also, since you are working in headless mode you should set the window size. The default window size in headless mode is much smaller than we normally use.
And you should use expected conditions explicit waits to access the elements only when they are ready for that.
This should work better:
QUESTION
Hi I am new to mystic so I apologize if I ask similar questions that have been answered before.
Say I have an input x (a list of length n), and a function f(x) that will map the input to a m-dimensional output space. I also have a m-dimensional constraint list that also depends on the input x (say it is g(x)), and I want to make sure the output is less than the constraint for each element of the m-dimensional list. How should I specify this in mystic?
simplified example:
...ANSWER
Answered 2022-Feb-20 at 18:32I'm the mystic
author. The easiest way I'd constrain one function's output with another is by using a penalty (soft constraint).
I'll show a simple case, similar to what I think you are looking for:
QUESTION
Trying to get this ['Team Instinct', 'Team Valor', 'Team Mystic']
To this
...ANSWER
Answered 2022-Feb-03 at 19:56You forgot to return prevValue;
QUESTION
Absolutely no settings/code have changed, this all worked 1 week ago (used exact same buyer login to perform test subscription and it worked), now I'm getting following error:
I have checked the seller account settings and "block non-encrypted payment URLs" setting is turned OFF. (found some google posts suggesting to check this).
Any help greatly appreciated, as you can see PayPal's error is not very helpful in helping to diagnose the problem.
...ANSWER
Answered 2022-Feb-01 at 15:05This is (almost certainly) an issue on PayPal's side.
We're seeing the same error on our end, without code changes either.
Unfortunately, the status page doesn't mention this incident at the moment (2022-02-01 15:00:00 UTC):
https://www.paypal-status.com/product/sandbox
Check that page regularly over the next few hours, as well as the "Incident history" page:
https://www.paypal-status.com/history/sandbox
QUESTION
I have 2 functions defined in my provider file that do similar things ... filter a product list to return products by category name (getByCatName) and by brand name (getByBrandName). I invoke both functions by making similar ref.read calls to the controller file. The catList works as desired by returning the list of products for category clicked. However, the brand name function is returning empty list probably because the brand parameter is not getting passed to the getByBrandName() function. Below are snippets of code that may be helpful to get your help. I have spent 3 days checking and rechecking my code with online research but no luck. I am thinking the filter for products in categories works because I am passing arguments via a ModalRoute (...) navigation routine to desired screen. However, for brand I am not using a navigation routing as it is not applicable here. BrandContent Screen:
...ANSWER
Answered 2022-Jan-21 at 20:10I solved this issue by adding a ref.read() statement to pull the brand clicked from the navRailProvider that controls navigation and displays corresponding brand page. This line of code was missing in my original code (BrandContent.dart). See code snippets below and screenshot of simulator.
BrandContent.dart:
QUESTION
I'm working on an MTG database, I'm trying to get the total value of all cards that a user owns I'm using Sequelize with Postgres. I have 4 tables with associations:
...ANSWER
Answered 2022-Jan-11 at 15:14Sequelize is not intended to execute complex aggregation queries. You either need to use a plain SQL query or at least a SQL subquery inside User.findAll
attributes
option like this:
QUESTION
I'm working with HTML files created by Acrobat, which doesn't use proper HTML entities to escape Unicode characters. I need to include single and double right quotation marks in a regex pattern, but every attempt I've made at escaping these characters has failed in my script...even if it works from a regular PowerShell session.
For example, this find/replace does not work:
...ANSWER
Answered 2021-Dec-02 at 21:35Try using the Unicode values instead of backquoting the literal:
QUESTION
I have an optimalization problem where I want to minimize the quantity -sum(p log(p))dx (entropy) with the constraints sum(p)dx == 1 and sum(p.x)dx == 0.2, where p and x are arrays and dx is a scalar. I tried to implement this using mystic this way:
...ANSWER
Answered 2021-Nov-24 at 21:36I'm the mystic
author. The primary issue is that you've assumed mystic.symbolic
can understand vector notation, and it can't.
QUESTION
I would like to use mystic solver to solve the following nonlinear optimisation problem with nonlinear constraints. Here the code:
...ANSWER
Answered 2021-Nov-13 at 15:52I'm the mystic
author. Penalty functions are essentially soft constraints, so they can be violated. When they are, they will add a penalty to the cost
. If you want to restrict the input values explicitly, then you want a hard constraint... given with the constraints
keyword. So, add the following to ensure that the candidate solutions are always chosen from the positive orthant (i.e. from within your chosen bounds).
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install mystic
You can use mystic 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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