tsIbm

A dataset containing the first four generations of yearly IBM general-purpose
computers installations in the USA.

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

tsIbm function

A data frame with 24 observations and 4 variables<dl>
<dt>SIU1</dt>
<dd>1st generation</dd><dt>SIU2</dt>
<dd>2nd generation (starts 6 years after first generation)</dd><dt>SIU3</dt>
<dd>3rd generation (starts 11 years after first generation)</dd><dt>SIU4</dt>
<dd>4th generation (starts 16 years after first generation)</dd></dl>

Format

Time series: Sales of IBM Computers — tsIbm

A data frame with 24 observations and 4 variables<dl>
<dt>SIU1</dt>
<dd>1st generation</dd>

<dt>SIU2</dt>
<dd>2nd generation (starts 6 years after first generation)</dd>

<dt>SIU3</dt>
<dd>3rd generation (starts 11 years after first generation)</dd>

<dt>SIU4</dt>
<dd>4th generation (starts 16 years after first generation)</dd>

</dl>

tsIbm: Time series: Sales of IBM Computers

Description

Arguments

Format

References