Description Usage Arguments Value Note Author(s) See Also Examples

This function calculates the values of diffusion curves that can be of `"bass"`

,
`"gompertz"`

, `"gsgompertz"`

or `"weibull"`

type, given some parameters.

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`n` |
number of periods to calculate values for. |

`w` |
vector of curve parameters (see note). If argument curve is used, this is ignored. |

`type` |
diffusion curve to use. This can be "bass", "gompertz" and "gsgompertz". If argument curve is used, this is ignored. |

`curve` |
if provided |

Returns a matrix of values with each row being a period.

`w`

needs to be provided for the Bass curve in the order of
`"p", "q", "m"`

, where "p" is the coefficient of innovation, "q" is the
coefficient of imitation and "m" is the market size coefficient.

For the Gompertz curve, vector `w`

needs to be in the form of
`("a", "b", "m")`

. Where "a" is the x-axis displacement coefficient, "b"
determines the growth rate and "m" sets, similarly to Bass model, the
market potential (saturation point).

For the Shifted-Gompertz curve, vector `w`

needs to be in the form of
`("a", "b", "c", "m")`

. Where "a" is the x-axis displacement
coefficient, "b" determines the growth rate, "c" is the shifting parameter
and "m" sets, similarly to Bass model, the market potential (saturation
point).

For the Weibull curve, vector `w`

needs to be in the form of
`("a", "b", "m")`

. Where "a" is the scale parameter, "b" determines the
shape. Together, "a" and "b" determine the stepness of the curve. The "m"
parameter sets the market potential (saturation point).

Oliver Schaer, [email protected],

Nikoloas Kourentzes, [email protected]

`diffusion`

for fitting a diffusion curve.

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