Messages

1

ActiveX / Re: Is it possible to unselect a state ?

« on: August 04, 2014, 17:23:36  »

Thank you works perfectly !

2

ActiveX / Is it possible to unselect a state ?

« on: July 29, 2014, 16:03:15  »

Hi,

I have entered evidence for a discrete chance node with the simple function SelectState() and then propagated it through the network with the function Propagate(). I wondered if it there is a function that would unselect the state ?

Thanks.

3

ActiveX / How to manipulate posterior marginals ?

« on: July 14, 2014, 11:29:04  »

Hello,

I would like to manipulate posterior marginals of discrete chance nodes, e.g. node.Belief(x). But the access of this method is only for reading purpose whereas I would need one to be for writing also. Is there a way of doing so or to circumvent it ?

Thank you in advance

4

ActiveX / Re: Using invoke function in Matlab

« on: July 10, 2014, 10:48:28  »

You cannot set the subtype to "boolean" unless the node has exactly two states.  In other words, you must first set the number of states for the node.

Thank you for your reply. Adding the line

set(node,'NumberOfStates',2);

just before

set(node,'SubType','hSubtypeBoolean');

works perfectly.

5

ActiveX / Using invoke function in Matlab

« on: July 08, 2014, 17:39:18  »

Hi,

I am using the invoke function in Matlab to handle the objects and their methods in Matlab. For example I have the following code to create a discrete labeled node:

function [ node ] = invokeDiscreteNodeLabeled(LabelCollection,domain,nodename)
%   LabelCollection is a Matlab cell containing the labels for the states
%   of the node
%   domain is the domain of the BN we consider
%   nodename is the name of the node

nstates=length(LabelCollection);
node=invoke(domain,'GetNewNode','hCategoryChance','hKindDiscrete');
set(node,'Name',nodename);
set(node,'Label',nodename);
set(node,'SubType','hSubtypeLabel');
set(node,'NumberOfStates',nstates);
for i=1:nstates
    set(node,'StateLabel',i-1,LabelCollection{i});
end

end

The above code works perfectly but when I try to do the same to create a boolean node I get the following error

Error using Interface.HUGIN_API_ActiveX_Server_7.3.Node/set
Invoke Error, Dispatch Exception:
Source: HAPI
Description: An API function was called with an invalid argument (e.g., a NULL object was passed to a
function that expects a non-NULL argument).

Error in invokeDiscreteBooleanNode (line 7)
set(node,'SubType','hSubtypeBoolean');

The code for the boolean node is the following:

function [ node ] = invokeDiscreteBooleanNode(domain,nodename)
%invokeDiscreteBooleanNode Create a boolean node

node=invoke(domain,'GetNewNode','hCategoryChance','hKindDiscrete');
set(node,'Name',nodename);
set(node,'Label',nodename);
set(node,'SubType','hSubtypeBoolean');

end

Thank you in advance for your answer !