Model Building (liesel.model)#
This is an overview of the most important building blocks for setting up your model
We usually import
liesel.model as follows:
import liesel.model as lsl
The model building workflow in Liesel consists of two steps:
Set up the nodes and variables that make up your model.
This document provides an overview of the most important classes for model building. You find more guidance on how to use them in the respective API documentation and in the tutorials.
Nodes and Variables#
The fundamental building blocks of your model graph are given by just four classes. Each of these building blocks is documented with examples, so make sure to check them out.
A variable in a statistical model, typically with a probability distribution.
To set up
Var objects, Liesel provides two helper functions:
Helper function that returns an observed
Helper function that returns a parameter
Var objects with these functions makes sure that the respective
Var.parameter flags are correctly set. This in
turn ensures that the
Var.log_prob of an observed variable will be included
Model.log_lik and the
Var.log_prob of a parameter variable
will be included in the
Build and plot your model#
The most important class here is the
A graph builder, used to set up a
A model with a static graph.
Plots the variables of a Liesel model.
Plots the nodes of a Liesel model.