IRIS Toolbox Reference Manual

# Steady-state file language

Steady-state (sstate) files are a complementary tool to solve and analyse the steady states of more complex models. They allow you to create steady-state files independent of the original model files, and write the steady-state equations in different ways, manipulate their structure or order, split the problem into subblocks, and combine numerical and symbolic solutions. Using then the sstate objects, you can compile and run stand-alone steady-state m-file functions based on your steady-state files.

#### Input parameters

- `!input` - List of input parameters or variables.
- `!growthnames` - Pattern for creating growth names.

#### Equations and assignments

- `!equations` - Block of equations or assignments.
- `!growthnames2imag` - Pattern for creating growth names.
- `!solvefor` - List of variables for which the current equations block will be solved.
- `!symbolic` - Attempt to solve the current equations block symbolically using the Symbolic Maths Toolbox.

#### Variables with steady state restricted to be positive

- `!log_variables` - Restrict the steady state of some of the variables to be positive.
- `!all_but` - Inverse list of variables with positive steady states.

#### Getting on-line help on sstate file language

    help sstatelang
    help sstatelang/keyword

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