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Ezra Harris
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Hidden Markov Model Matlab Code Download



I want to train a Hidden Markov model for a time series. I tried using Matlab but it is discrete in nature. Can anyone share some good libraries for building continuous HMM on time series. As I am new to HMM, it would be thankful if a code snippet for creating HMM for a time series from the library is shared




Hidden Markov Model Matlab Code Download



There is a Matlab library for continuous HMMs (Gaussian assumption) developed by K. Murphy. Here is the documentation which includes examples (codes snippets) and here is the most recent version of the codes to download.


FIGURE 3. Results summary for the Amplitude Envelope HMM. The right column shows the overall temporal statistics estimated from the continuous data without considering task structure. The fractional occupancy (A), Lifetimes (B) and Interval times (C) are shown. The middle column shows the group level results of the GLM analysis computed from the task-evoked fractional occupancies. (D) Shows the mean change in occupancy across all trials relative to baseline. Periods of significant change are indicated by a solid line at the bottom of the plot color-coded to state. (E) The result of the differential contrast between the Face and Scrambled Face stimuli. (F) The results of the differential contrast between the Famous and Unfamiliar face stimuli. (G) The mean activation maps for the six states extracted from the HMM observation models. The activation in each state is z-transformed.


EconPapers FAQ Archive maintainers FAQ Cookies at EconPapers The RePEc blog The RePEc plagiarism page HSC SoftwareFrom Hugo Steinhaus Center, Wroclaw University of TechnologyContact information at EDIRC.Bibliographic data for series maintained by Rafal Weron (Obfuscate( 'pwr.wroc.pl', 'rafal.weron' )).Access Statistics for this software series.Track citations for all items by RSS feedIs something missing from the series or not right? See the RePEc data check for the archive and series. ENERGIES_9_621_FIGS: MATLAB codes and data for plotting figures from "Automated variable selection and shrinkage for day-ahead electricity price forecasting" Bartosz Uniejewski, Jakub Nowotarski and Rafał Weron (2018-09-09) ENERGIES_9_621_CODES: MATLAB codes for computing electricity spot price forecasts from "Automated variable selection and shrinkage for day-ahead electricity price forecasting" Bartosz Uniejewski, Jakub Nowotarski and Rafał Weron (2018-09-09) HOLTWINTERS: MATLAB function to compute forecasts of the Holt-Winters exponential smoothing model Rafał Weron (2017-04-28) SCAR: MATLAB function to compute day-ahead predictions of the electricity spot price using the Seasonal Component AutoRegressive (SCAR) model Jakub Nowotarski and Rafał Weron (2016-07-23) SCAR_EXAMPLE: MATLAB codes and data for "On the importance of the long-term seasonal component in day-ahead electricity price forecasting" Jakub Nowotarski and Rafał Weron (2016-07-23) AKS_Simulation: Standalone application for simulating cellular automata Agnieszka Kowalska-Styczen (2016-02-24) QRA: MATLAB function to compute interval forecasts using Quantile Regression Averaging (QRA) Jakub Nowotarski (2014-07-30) AWC_HURST: MATLAB function to compute the Hurst exponent using the Average Wavelet Coefficient (AWC) method Rafał Weron (2014-06-21) DESEASONALIZE: MATLAB function to remove short and long term seasonal components (new implementation) Rafał Weron (2014-01-06) The World According to Spinson (WAS): Standalone application for simulating agent-based models Piotr Przybyla, Katarzyna Sznajd-Weron and Rafał Weron (2013-05-08) LTSC_EXAMPLE: MATLAB example script and data for "Robust estimation and forecasting of the long-term seasonal component of electricity spot prices" Jakub Nowotarski and Rafał Weron (2013-04-27) LTSCWAVE: MATLAB function to estimate and forecast the long-term seasonal component (LTSC) of an electricity spot price series using wavelet-based methods Jakub Nowotarski, Jakub Tomczyk and Rafał Weron (2013-04-26) LTSCSIMPLE: MATLAB function to estimate and forecast the long-term seasonal component (LTSC) of an electricity spot price series using simple methods Jakub Nowotarski, Jakub Tomczyk and Rafał Weron (2013-04-08) LTSCSIN: MATLAB function to estimate and forecast the long-term seasonal component (LTSC) of an electricity spot price series using sine-based methods Jakub Nowotarski, Jakub Tomczyk and Rafał Weron (2013-04-08) FQBIED: MATLAB functions for "Inference for vast dimensional elliptical distributions" Yves Dominicy, Hiroaki Ogata and David Veredas (2012-10-10) E_HMM: MATLAB function to calculate Electromagnetic Field (EMF) intensity using a Hidden Markov Model (HMM) filter Joanna Janczura and Rafał Weron (2012-04-15) RUNNINGMEDIAN: MATLAB function to compute a running median of a time series Rafał Weron (2012-04-15) HMM_EST: MATLAB function to estimate parameters of a 2-state Hidden Markov Model (HMM) Joanna Janczura (2012-04-14) VAR_AND_ES: SHAZAM code for computing VaR and Expected Shortfall Ibrahim Onour (2012-04-04) CI_WEIBULLTAIL: MATLAB function to test for 'dragon kings' in Weibull-type tails Joanna Janczura and Rafał Weron (2012-03-03) CI_POWERTAIL: MATLAB function to test for 'dragon kings' vs. 'black swans' Joanna Janczura and Rafał Weron (2012-03-03) MRS3IR_SIM: MATLAB function to simulate trajectories of a Markov regime-switching (MRS) model with 3 independent regimes Joanna Janczura and Rafał Weron (2011-10-10) MRS3IR_EST: MATLAB function to estimate parameters of a Markov regime-switching (MRS) model with 3 independent regimes Joanna Janczura and Rafał Weron (2011-10-10) MRS3_PLOT: MATLAB function to plot calibration results for a Markov regime-switching (MRS) model with 3 regimes Joanna Janczura and Rafał Weron (2011-10-10) MRS2_PLOT: MATLAB function to plot calibration results for a Markov regime-switching (MRS) model with 2 regimes Joanna Janczura and Rafał Weron (2011-10-03) PS2R_EST: MATLAB function to estimate parameters of a 2-regime parameter switching (PS) model Joanna Janczura and Rafał Weron (2011-10-03) PS2R_SIM: MATLAB function to simulate trajectories of a 2-regime parameter switching (PS) model Joanna Janczura and Rafał Weron (2011-10-03) MRS2IR_EST: MATLAB function to estimate parameters of a Markov regime-switching (MRS) model with 2 independent regimes Joanna Janczura and Rafał Weron (2011-10-03) MRS2IR_SIM: MATLAB function to simulate trajectories of a Markov regime-switching (MRS) model with 2 independent regimes Joanna Janczura and Rafał Weron (2011-10-03) GPH: MATLAB function to estimate the Hurst exponent using the Geweke-Porter-Hudak (1983) spectral estimator (periodogram regression method) Rafał Weron (2011-09-30) HURST: MATLAB function to compute the Hurst exponent using R/S Analysis Rafał Weron (2011-09-30) DFA: MATLAB function to compute the Hurst exponent using Detrended Fluctuation Analysis (DFA) Rafał Weron (2011-09-30) STF2HES: MATLAB functions for "FX smile in the Heston model" Agnieszka Janek and Rafał Weron (2010-12-27) SIMGBM: MATLAB function to simulate trajectories of Geometric Brownian Motion (GBM) Rafał Weron (2010-12-27) STF2HES_EX: MATLAB example scripts for "FX smile in the Heston model" Agnieszka Janek and Rafał Weron (2010-12-27) COR: MATLAB function to compute the correlation coefficients Joanna Nowicka-Zagrajek and Rafał Weron (2008-06-27) MFE Toolbox ver. 1.0.1 for MATLAB Rafał Weron, Jakub Jurdziak and Adam Misiorek (2007-11-05) CHRISTOF: MATLAB function to perform Christoffersen's (1998) tests of coverage Rafał Weron (2007-09-09) PERIODOG: MATLAB function to compute and plot the periodogram of a time series Rafał Weron (2006-09-23) SNDE06_EXAMPLE: MATLAB codes and data for "Point and Interval Forecasting of Spot Electricity Prices: Linear vs. Non-Linear Time Series Models" Adam Misiorek, Stefan Trueck and Rafał Weron (2006-07-19) Financial Engineering Toolbox (FET) ver. 2.5 for MATLAB Rafał Weron (1998-12-01) This site is part 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How people look at visual information reveals fundamental information about them; their interests and their states of mind. Previous studies showed that scanpath, i.e., the sequence of eye movements made by an observer exploring a visual stimulus, can be used to infer observer-related (e.g., task at hand) and stimuli-related (e.g., image semantic category) information. However, eye movements are complex signals and many of these studies rely on limited gaze descriptors and bespoke datasets. Here, we provide a turnkey method for scanpath modeling and classification. This method relies on variational hidden Markov models (HMMs) and discriminant analysis (DA). HMMs encapsulate the dynamic and individualistic dimensions of gaze behavior, allowing DA to capture systematic patterns diagnostic of a given class of observers and/or stimuli. We test our approach on two very different datasets. Firstly, we use fixations recorded while viewing 800 static natural scene images, and infer an observer-related characteristic: the task at hand. We achieve an average of 55.9% correct classification rate (chance = 33%). We show that correct classification rates positively correlate with the number of salient regions present in the stimuli. Secondly, we use eye positions recorded while viewing 15 conversational videos, and infer a stimulus-related characteristic: the presence or absence of original soundtrack. We achieve an average 81.2% correct classification rate (chance = 50%). HMMs allow to integrate bottom-up, top-down, and oculomotor influences into a single model of gaze behavior. This synergistic approach between behavior and machine learning will open new avenues for simple quantification of gazing behavior. We release SMAC with HMM, a Matlab toolbox freely available to the community under an open-source license agreement.


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