Search found 430 matches

by marek [BayesFusion]
Sun Apr 03, 2022 4:20 pm
Forum: SMILE
Topic: problem with my HBN
Replies: 5
Views: 3454

Re: problem with my HBN

Hi Nira, I'm afraid there is no good answer to your question, as the answer depends on the domain knowledge and what you want to accomplish. Imagine somebody is asking you: What do I put in the Excel cells? What equations and what numbers? These questions are similar to what you have asked. The answ...
by marek [BayesFusion]
Sat Apr 02, 2022 6:25 pm
Forum: GeNIe
Topic: discretize equation node for DBN
Replies: 3
Views: 2233

Re: discretize equation node for DBN

Hi Bahman, Sorry for the delay. As I suggested in my previous answer, we support our software but not really modeling effort, which requires domain knowledge and is always time consuming. We can do this for you on a consulting basis if this is something that would interest you. Let me just answer yo...
by marek [BayesFusion]
Sat Apr 02, 2022 6:12 pm
Forum: SMILE
Topic: problem with my HBN
Replies: 5
Views: 3454

Re: problem with my HBN

Hi Nira, I don't see any problems with it except for that it is in a very initial stage of construction. The grey arcs tell you that you need to look at the definition in the child nodes (I explained it in another query and it is also explained in GeNIe manual, section "Structural analysis"...
by marek [BayesFusion]
Sat Apr 02, 2022 6:04 pm
Forum: SMILE
Topic: HBN
Replies: 1
Views: 2442

Re: HBN

Hi Nira, A discrete node can have continuous parents. In that case, the discretization that you specify in the Discretization tab will be used to creating the CPT for the child node. Please look at the section "Hybrid models" in the chapter "Equation-based and hybrid models" in G...
by marek [BayesFusion]
Sat Apr 02, 2022 6:03 pm
Forum: SMILE
Topic: Hybrid BN
Replies: 5
Views: 3736

Re: Hybrid BN

Hi Nour, SMILE has everything that GeNIe has, so it certainly implements hybrid networks. Grey color denotes arcs that are not necessary in the sense of having no impact on the child variable. Whenever you create a new arc, it will have grey color because the CPT in the node contains (identical) uni...
by marek [BayesFusion]
Sat Apr 02, 2022 5:56 pm
Forum: SMILE
Topic: question
Replies: 1
Views: 2522

Re: question

Hi Nira,

Yes, this is correct. You will need to discretize the continuous variables in your data set (please make sure that they match the states in the network!). SMILE's implementation of the EM algorithm will work for mixture of discrete and continuous variables.

I hope this helps,

Marek
by marek [BayesFusion]
Fri Apr 01, 2022 10:23 pm
Forum: GeNIe
Topic: How to set evidence to a binomial equation node by external counters of successes
Replies: 4
Views: 2399

Re: How to set evidence to a binomial equation node by external counters of successes

HI Paolo, I'm not 100% sure if I understand your question completely but I have modified your model (added a third set of variables) and created an additional node through which you can enter evidence. I'm attaching this model. Does this do what you wanted? If not, which I suspect is the case, what ...
by marek [BayesFusion]
Thu Mar 24, 2022 10:24 am
Forum: GeNIe
Topic: discretize equation node for DBN
Replies: 3
Views: 2233

Re: discretize equation node for DBN

Hi Bahman, You are correct -- I used the CPT created by automatic discretization for copying and pasting into the discrete nodes into the DBN. You can do the same for any dynamic model -- you just need to reflect on the correct structure, i.e., what influences what. You can get this information from...
by marek [BayesFusion]
Thu Mar 24, 2022 10:14 am
Forum: GeNIe
Topic: query about noisyMAX algorithm
Replies: 9
Views: 3258

Re: query about noisyMAX algorithm

The problem is quite simple and quite independent of whether the node Effect is a NoisyOR or is just a regular chance variable. P(E) is equal to: P(E)=P(E|AB)P(AB)+P(E|A~B)P(A~B)+P(E|~AB)P(~AB)+P(E|~A~B)P(~A~B) In the first case, i.e., without the Ancestor, A and B are independent of each other and ...
by marek [BayesFusion]
Wed Mar 23, 2022 7:44 pm
Forum: GeNIe
Topic: sensitivity to parameters
Replies: 2
Views: 1758

Re: sensitivity to parameters

Hi Yan, You are pretty much right. The paper of Coupe and van der Gaag looks at this problem precisely the way we do. GeNIe calculates the derivative of the posterior probability in question taken over each individual parameter. The algorithm GeNIe's implementation is based on is described in Kjærul...
by marek [BayesFusion]
Tue Mar 22, 2022 2:44 pm
Forum: GeNIe
Topic: is it a Usual DBN?
Replies: 3
Views: 1790

Re: is it a Usual DBN?

Hi Bahman, Generally, a continuous (equation) variable can contain any function from the list of functions supported by GeNIe (please look at the manual or the tree of functions on the right-hand side in node definition. Conditional functions include If(), Choose() and Switch(). I believe that you w...
by marek [BayesFusion]
Sat Mar 19, 2022 11:24 am
Forum: GeNIe
Topic: is it a Usual DBN?
Replies: 3
Views: 1790

Re: is it a Usual DBN?

Hi Bahman, When I look at the table of the variables in this model, I am also getting confused: Something is funny here, even though it does seem to be a DBN. We are quite surely dealing with N different temporal models (different devices?) that don't interact with each other outside of the initial ...
by marek [BayesFusion]
Fri Mar 18, 2022 1:38 pm
Forum: GeNIe
Topic: problem with unrolling DBN
Replies: 4
Views: 2041

Re: problem with unrolling DBN

Hi Bahman, Most definitely, you can edit the unrolled network any way you please. You can also edit the equations. We do not support equations in DBNs yet but it is a matter of time -- we just haven't had time to do that but we will most certainly return to this issue. Essentially, we need to extend...
by marek [BayesFusion]
Tue Mar 15, 2022 10:35 pm
Forum: SMILE
Topic: inference alogorithm with forward operation
Replies: 1
Views: 2709

Re: inference alogorithm with forward operation

Hi Bahman, You should be able to create a network like the one in the picture using SMILE. It may be a challenging network in terms of the number of parameters and perhaps inference but well, SMILE is very, very fast, so you may not even notice the time that it takes to update this network. If the s...
by marek [BayesFusion]
Thu Mar 10, 2022 1:23 pm
Forum: GeNIe
Topic: how to interprete the result of sensitivity analysis
Replies: 4
Views: 2126

Re: how to interprete the result of sensitivity analysis

Hi Yan, First of all, if you want your results to be repeatable, please set the random number seed to something that is not zero. A zero seed pretty much uses the computer clock as the seed to the random number generators. The parameters will change when you change the seed (zero seed means that you...