In Matlab, I have a `1*1` struct with 34 fields. every field is a 3d array by itself. A picture of it attached below. 
I want to have a code to find `-9.969209968386869e+36` in **everywhere of this struct** and replace it with `NaN`.
[here is a picture of it](https://i.stack.imgur.com/ASuC6.jpg)

Thank you in advance