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# Introduction

Model Builder is a graphical ODE simulator. It allows the user to define, simulate and analyze arbitrary systems of Ordinary Diferential Equations.
Purpose
ModelBuilder was created to be a generic interface to people that need to simulated Ordinary Differential Equations (ODE) models and analyze their output.
For that purpose I wrote a (hopefully) nice frontend to the LSODA ODE solving library, so that the model equations can be written directly in the main window and the parameters for the numerical integration can also be set easily.
Features

- Equation-based model definition. No need to learn to program to define and run your models. Just type-in you differential equations
- Graphic output of simulation. You can save the graphics in the most common formats: png, svg, pdf, etc.
- Spreadsheet view of the results. From the spreadsheet you can make customized plots from your variables. You can also export your data to a .csv text file
- Latex rendering of your system of equations. Check you equation in clear mathematical notation.
- Intuitive graphical interface.
- Free software. Licensed under the GPL
- Portable. Run wherever Python runs.
- Uncertainty analysis module. Implements a straightforward interface for the Bayesian Melding method.
- Sensitivity analysis. Find out how sensitive your model is to variations in parameter values.