@mdim: How do I write read function without a FileStorage object. Previously I used both FileStorage and FileNode class to read xml/yaml from file. For example, with the above AP (as per you mentioned) I can read variable data using:
```cpp
double ALPHA = (double)fn["alpha"];
```
but how can I read Matrices into a cv::Mat as I cannot do a 
```cpp
cv::Mat ALPHAMAT = (double)fn["learnt_mat"];
```