# Numerical simulations in `tunacell`

¶

## Using the script¶

When installed using pip, a `tunasimu`

executable is provided to run
numerical simulations and save results on local directories. These
files can be used to try `tunacell`

’s analysis tools.

Such a command comes with various parameters, that will printed upon call:

```
$ tunasimu -h
```

There is a list of (optional) parameters.

## What are these simulations about?¶

`ou`

is the value of the Ornstein-Uhlenbeck random process simulated
in each cell, `int_ou`

is the integrated value of the random process reset
to zero at each cell birth, `exp_int_ou`

is the exponential of the later
value. One can think of the Ornstein-Uhlenbeck as instantaneous growth rate of
the cell, and thus `exp_int_ou`

can be associated to cell length.