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+++
title = "Export"
weight = 20
+++
## Export a Datafield
#### Save in various formats
A `Datafield` can be saved in various data formats
through the BornAgain Python method
```python
import bornagain as ba
simulation = ...
result = simulation.simulate()
ba.IOFactory.writeDatafield(result, file_name)
```
where `file_name` must have one of the extensions
- `.txt` --- ASCII file with 2D array [nrow][ncol], layout as in NumPy,
- `.int` --- BornAgain internal ASCII format,
- `.tif` --- 32-bits TIFF file,
to which one may append a second extension that specifies compression:
- `.gz`,
- `.bz2`.
#### Export to NumPy
To extract data from `Datafield` in form of NumPy arrays, use
```python
result = simulation.simulate()
arr_x = result.xCenters() # centers of x bins
arr_i = result.dataArray() # intensities
arr_di = result.errors() # error estimates thereof
```
To save any such array, use the NumPy method
```python
numpy.savetxt("intensity.txt", arr)
```
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