MATLAB: Error loading TreeBagger from .MAT file in deployed app.

Question

Hiya =)

I've been browsing the forums looking for information on this… When run in MatLab my app works fine. But when it is deployed, I get this message:

Warning: Variable 'model' originally saved as a TreeBagger cannot be instantiated as an object and will be read in as a uint32.

I have a deployed app that trains models and stores them out using save() with '-struct' semantics. Another deployed app loads and uses these models regularly.

Note that my TreeBagger is actually a field within the struct (maybe this is significant):

model.meta    % a whole bunch of info
model.model   % the TreeBagger object

I have come across the following article that may explain the behaviour. It discusses saving (but not loading?) of user-defined objects:

<http://www.mathworks.com.au/support/solutions/en/data/1-BU9EU7/index.html?product=ML&solution=1-BU9EU7>

This is where I am confused. The TreeBagger object is not really user-defined as such. It's part of a rather expensive toolbox, and would presumably define its own saveobj and loadobj methods if it needed to…

Do I need to follow the linked article and hack the TreeBagger class, or is there a simple solution?

Thanks in advance!

-g-

Answer 1

This might help. Different class, same Toolbox:

<http://www.mathworks.com/support/solutions/en/data/1-C2PQWJ/index.html?product=CO&solution=1-C2PQWJ>