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 # Example 04: Retrieve Data from FFT MTF 

 Last update: 16.07.2025 

Ex 4: A sample file (…\\Sequential\\Objectives\\Cooke 40 degree field.zos) is loaded and a new FFT MTF analysis window is opened. The maximum frequency and sampling is modified. Results are retrieved and the data series are plotted; the OpticStudio FFT MTF plot is recreated.

```
Input:      Sequential\Objectives\Cooke 40 degree field.zos
<p>Output:     Graph (Matlab, Python)
API\e04_pull_data_from_FFTMT.txt (C++, C#)
</p>
```

[C#](page_ex04_cs.xhtml)

[C++](page_ex04_cpp.xhtml)

[Mathematica](page_ex04_nb.xhtml)

[Matlab](page_ex04_m.xhtml)

[Python](page_ex04_py.xhtml)