Error loading TreeBagger from .MAT file in deployed app.

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-

[Geoff]

Just need to bump this question again, as I'm really stuck and there's an awful lot at stake for this project! I am flabbergasted at the things that seem to go wrong when you deploy an application! It's almost like starting the development again.

I tried copying the TreeBagger class definition m-file into my deployment directory (it was a long shot), but no luck.

Any suggestions? =(

[Walter Roberson]

You should probably open a support case.

Answer 1

[owr]

This might help. Different class, same Toolbox:

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

[Geoff]

Thank you so much! I spent ages trying to find this information but my searches never turned up anything useful.

Answer 2

[Geoff]

Just for completeness, I'll post the solution from owr's linked article....

The class definition must be imported by including a pragma in my function that calls load(). As follows:

function [model] = loadmodel( filename )
  %#function TreeBagger
  model = load( filename, '-mat' );
end

Yaay!!!

Cheers =)

[zhiqiang gao]

It works. Thanks!