SARMAX.refinement

Object of class<code>Dimora</code>, i.e. <code>BASS.generalized</code>, codeBASS.standard or codeGG.model.

Non-seasonal part of the SARIMA model

arima_order

seasonal_order

Period of the seasonal part of the ARIMA model. Default value is 1 (daily data).

period

Logical "T" and "F", "T" for some graphs to be shown

display

This function allows to refine results obtained with a model of the <code>Dimora</code> class through a SARIMAX model, (Guseo et. al., 2007). The function <code>predict_SARMAX.refinement</code> is aviable for this procedure.

The implemented methods are: Bass model, Generalized Bass model (with rectangular shock, exponential shock, mixed shock and harmonic shock, 1 to 3 shocks available), Dynamic market potential model, and UCRCD model. The Bass model consists of a simple differential equation that describes the process of how new products get adopted in a population, the Generalized Bass model is a generalization of the Bass model with a function x(t), capturing the changing speed of diffusion. In some real processes the market potential may be not constant over time and a dynamic market potential model is needed. The Guseo-Guidolin model is a specification of this situation. The UCRCD model (Unbalanced Competition and Regime Change Diachronic) is a diffusion model used to capture the dynamics of competition between two products within the same market.

Zanghi Federico

DIMORA

Diffusion Models R Analysis

SARMAX.refinement function

<dl><dt>fit</dt>
<dd>Object of class<code>Dimora</code>, i.e. <code>BASS.generalized</code>, codeBASS.standard or codeGG.model.</dd><dt>arima_order</dt>
<dd>Non-seasonal part of the SARIMA model</dd><dt>seasonal_order</dt>
<dd>Seasonal part of the SARIMA model</dd><dt>period</dt>
<dd>Period of the seasonal part of the ARIMA model. Default value is 1 (daily data).</dd><dt>display</dt>
<dd>Logical "T" and "F", "T" for some graphs to be shown</dd></dl>

Arguments

Zanghi Federico <a href="/link/federico.zanghi.11%40gmail.com?package=DIMORA&version=0.2.0" data-mini-rdoc="DIMORA::federico.zanghi.11@gmail.com">federico.zanghi.11@gmail.com</a>

Author

SARMAX refinement of a Dimora model. — SARMAX.refinement

<dl>

<dt>fit</dt>
<dd>Object of class<code>Dimora</code>, i.e. <code>BASS.generalized</code>, codeBASS.standard or codeGG.model.</dd>

<dt>arima_order</dt>
<dd>Non-seasonal part of the SARIMA model</dd>

<dt>seasonal_order</dt>
<dd>Seasonal part of the SARIMA model</dd>

<dt>period</dt>
<dd>Period of the seasonal part of the ARIMA model. Default value is 1 (daily data).</dd>

<dt>display</dt>
<dd>Logical "T" and "F", "T" for some graphs to be shown</dd>

</dl>

Zanghi Federico <a href='mailto:federico.zanghi.11@gmail.com'>federico.zanghi.11@gmail.com</a>

SARMAX.refinement: SARMAX refinement of a `Dimora` model.

Description

Usage

Arguments

Author

See Also