Where can I find some usable implementation of Hidden Markov Models with multivariate observation sequences ?

More Hao Wang's questions See All

What are the hottest research topics in deep learning ?

04 May 2019 5,030 1 View

What are the hottest research topics in computer graphics ?

What is the list of the most heavily researched problems in computer graphics ?

04 May 2019 5,793 3 View

How do you evaluate graph visualization results ?

04 May 2019 2,779 3 View

Which school has the best computer graphics program ?

I keep being asked which university has the best computer graphics program in America ? I don't know. U has a quite good program, but I heard UNC ranks #1 from a U student back in my school...

02 March 2019 4,987 1 View

Is it possible to create an IoT-based big data solution ?

Is it possible to create a distributed framework similar to Hadoop on sensor networks ? For example, computation clients are pushed to each sensor.

02 March 2019 4,454 3 View

What should you do if a conference doesn't send you reviews?

I'm experiencing this problem twice with conferences organized by the same university - I never received the reviews when they rejected my papers. In my communications with the conference...

02 March 2019 8,625 4 View

How to check algorithmically whether a series of paragraphs form a coherent article?

Suppose I have a series of paragraphs, how do I know when put together, these paragraphs form a coherent article?

01 February 2013 3,233 2 View

Which dimensionality reduction approaches use only distance matrices?

I know Multidimensional Scaling uses only a distance matrix, but Self-Organizing Map requires coordinates of points in the original space. What are some other dimensionality reduction techniques,...

31 December 2012 4,971 2 View

Where can I find Self-Organizing Maps implementation that supports sparse matrices?

I've noticed in R we have SOM in package class and SOM in package kohonen, but these packages do not support sparse matrices.

31 December 2012 6,549 0 View

What is a good clustering algorithm on hybrid dataset composed of both numerical and categorical data?

I need to do clustering on a dataset composed of both numerical and categorical data. What algorithms do you recommend ?

10 November 2012 6,812 16 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

Why should we choose deep learning to machine learning? Why is CNN better for image classification? Can I get Typical Answer?

What Characteristics makes CNN work better?

03 March 2021 1,458 4 View

What are some of the research gaps in machine learning and artificial intelligence in africa?

i would to know some of the research gaps in the artificial intelligence field in most african countries.

03 March 2021 6,145 3 View

Anyone plz suggest relevant topic for research in image processing+Deep learning.?

I have selected brain tumor images ...but now found that already lots of research done n this topic.

03 March 2021 5,774 3 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

1. What is the impact of having different scales in a survey? and how can we solve this problem before and after data collection (Literature)?

1. What is the impact of having different scales in a survey? and how can we solve this problem before and after data collection (Literature-based reflection)? Thank you for your time and for...

03 March 2021 2,870 3 View

What degree of missing data in a particular case/participant results in Expectation-Maximisation no longer working?

I'm dealing with a mediation model and am using the PROCESS module in SPSS. Due to SPSS and PROCESS being limited in the imputation methods - being unable to handle multiple imputation - the other...

02 March 2021 4,362 1 View

How to normalise data on OPM package from R Studio ?

Good afternoon, I recently used OmniLog from BIOLOG for my experimentations : I tested the metabolism of different strains on 2 types of plates. I have 16 strains of 3 different groups...

02 March 2021 3,584 1 View

David B Keator

Hi,

Here's one for Matlab that I've used in the past: http://barzilouik.free.fr/cnam/DEA_STIC_opt_CONCEPT_APP_MULTIMED_2005/UV_PetitOral/ScrapBook/data/20050217202203/

If you have too few observations and too many hidden states, you can get singular matrices. Another reason might be a poor initialization. You can try a different initialization. You could also try adjusting the prior. If your matrix is singular then a different toolbox won't help...

Dave

Hao Wang

Thanks, David. I tried different initialization methods in RHmm, but still it didn't work. My observation sequences are sequences of vectors summing up to one. Do you think this is a problem?

Pedro Koob

Hi M. Wang,

I have the same problem as you, and I would like to know how did you solve yours.

Thanks in advance.

Muhammad Azam

Me too having the same problem but could not find the solution of this problem. Help needed !!