Nortonbass_startvalgen

Fits Norton Bass curve and estimated RMSE

internal

Various diffusion models to forecast new product growth. Currently
the package contains Bass, Gompertz, Gamma/Shifted Gompertz and Weibull curves. See
Meade and Islam (2006) <doi:10.1016/j.ijforecast.2006.01.005>.

Oliver Schaer

diffusion

Forecast the Diffusion of New Products

Nikolaos Kourentzes

Ivan Svetunkov

Nortonbass_startvalgen function

<dl><dt>x</dt>
<dd>matrix with generations</dd>
<dt>gstart</dt>
<dd>optional vector of starting points for the generations</dd>
<dt>flexpq</dt>
<dd>For <code>startvalgen="BB"</code>. Allows parameters p and q to be flexible if set <code>TRUE</code>.</dd>
<dt>startval.met</dt>
<dd><code>"iBM"</code> fits individual Bass model to each generation;
<code>"BB"</code> uses the approach described in Bass and Bass (2004).</dd></dl>

Arguments

Oliver Schaer, <a href="/link/info%40oliverschaer.ch?package=diffusion&version=0.4.0" data-mini-rdoc="diffusion::info@oliverschaer.ch">info@oliverschaer.ch</a>

Author

Fits Norton Bass curve and estimated RMSE — Nortonbass_startvalgen

<dl>

<dt>x</dt>
<dd>matrix with generations</dd>


<dt>gstart</dt>
<dd>optional vector of starting points for the generations</dd>


<dt>flexpq</dt>
<dd>For <code>startvalgen="BB"</code>. Allows parameters p and q to be flexible if set <code>TRUE</code>.</dd>


<dt>startval.met</dt>
<dd><code>"iBM"</code> fits individual Bass model to each generation;
<code>"BB"</code> uses the approach described in Bass and Bass (2004).</dd>

</dl>

Oliver Schaer, <a href='mailto:info@oliverschaer.ch'>info@oliverschaer.ch</a>

Nortonbass_startvalgen: Fits Norton Bass curve and estimated RMSE

Description

Usage

Value

Arguments

Author