# `compare.deposit`

The function [`compare.deposit`](#digger.compare.deposit) calculates the root mean squared error of observed and simulated deposit thickness.

An example of using this functionality is provided in the file `digger/examples/post-run/synthetic/setpostprocess.py`.
```{literalinclude} ../../../../../examples/post-run/synthetic/setpostprocess.py
:language: python
:start-after: Block 10 Start
:end-before: Block 10 End
```

:::{attention}
This code snippet is not fully self-sufficient. This snippet relies on simulation output files. To reproduce the example, execute the file `digger/examples/post-run/synthetic/setpostprocess.py` from within the directory in which it is located. **Before** the script is executed either the example simulation must be run or the file `digger/data/synthetic_output.zip` must be unzipped and the resulting directory (`_output`) must be placed within `digger/examples/post-run/synthetic/`.
:::

This code returns the root mean squared error of the difference between observed and simulated deposits.