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Function Reference


Data Preprocessing
GARCH Modeling
Model Specification
Model Visualization
Multiple Time Series
Lag Operator Polynomials
Statistics and Tests
Stochastic Differential Equations
Utilities

Data Preprocessing

hpfilterHodrick-Prescott filter for trend and cyclical components

GARCH Modeling

garchfitEstimate ARMAX/GARCH model parameters
garchpredForecast ARMAX/GARCH model responses
garchsimSimulate ARMAX/GARCH model responses

Model Specification

garchgetGet ARMAX/GARCH model specification parameters
garchsetSet ARMAX/GARCH model specification parameters

Model Visualization

garchplotPlot ARMAX/GARCH model responses

Multiple Time Series

vgxarConvert VARMA model to VAR model
vgxcountCount VARMAX model parameters
vgxdispDisplay VARMAX model parameters and statistics
vgxgetGet VARMAX model specification parameters
vgxinferInfer VARMAX model innovations
vgxloglikVARMAX model loglikelihoods
vgxmaConvert VARMA model to VMA model
vgxplotPlot VARMAX model responses
vgxpredForecast VARMAX model responses
vgxprocGenerate VARMAX model responses from innovations
vgxqualTest VARMAX model for stability/invertibility
vgxsetSet VARMAX model specification parameters
vgxsimSimulate VARMAX model responses
vgxvarxEstimate VARX model parameters

Lag Operator Polynomials

LagOp classCreate lag operator polynomial (LagOp) object
filterApply lag operator polynomial to filter time series
isEqLagOpDetermine if two LagOp objects are same mathematical polynomial
isNonZeroFind lags associated with nonzero coefficients of LagOp objects
isStableDetermine stability of lag operator polynomial
minusLag operator polynomial subtraction
mldivideLag operator polynomial left division
mrdivideLag operator polynomial right division
mtimesLag operator polynomial multiplication
plusLag operator polynomial addition
reflectReflect lag operator polynomial coefficients around lag zero
toCellArrayConvert lag operator polynomial object to cell array

Statistics and Tests

adftestAugmented Dickey-Fuller test for unit root
aicbicAkaike and Bayesian information criteria
archtestEngle test for residual heteroscedasticity
autocorrSample autocorrelation
crosscorrSample cross-correlation
kpsstestKPSS test for stationarity
lbqtestLjung-Box Q-test for residual autocorrelation
lmctestLeybourne-McCabe stationarity test
lmtestLagrange multiplier test of model specification
lratiotestLikelihood ratio test of model specification
parcorrSample partial autocorrelation
pptestPhillips-Perron test for one unit root
vratiotestVariance ratio test for random walk
waldtestWald test

Stochastic Differential Equations

bmBrownian motion models
cevConstruct constant elasticity of variance models (objects of class CEV)
cirCox-Ingersoll-Ross mean-reverting square root diffusion models
diffusionConstruct diffusion-rate model components
driftConstruct drift-rate model components
gbmCreate GBM model
hestonCreate Heston model
hwvCreate HWV model
interpolateBrownian interpolation of stochastic differential equations
sdeCreate SDE model from user-specified functions
sdeddoCreate sdeddo model from Drift and Diffusion objects
sdeldConstruct stochastic differential equation from linear drift-rate models
sdemrdConstruct stochastic differential equation from mean-reverting drift-rate models
simByEulerEuler simulation of stochastic differential equations (SDEs)
simBySolutionSimulate approximate solution of diagonal-drift HWV and GBM processes
simulateSimulate multivariate stochastic differential equations (SDEs)
ts2funcConvert time series arrays to functions of time and state

Utilities

garcharConvert ARMA model to AR model
garchcountCount ARMAX/GARCH model parameters
garchdispDisplay ARMAX/GARCH model parameters and statistics
garchinferInfer ARMAX/GARCH model innovations
garchmaConvert ARMA model to MA model
lagmatrixCreate matrix of lagged time series
price2retConvert prices to returns
ret2priceConvert returns to prices
  


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