NetLogo 7.0.0-beta2:

matrix:forecast-continuous-growth

matrix:forecast-continuous-growth data-list

Reports a four-element list of the form:

[ forecast constant  growth-rate  R2 ]. Whereas matrix:forecast-compound-growth assumes discrete time with Y growing by a given proportion each finite period of time (e.g., a month or a year), matrix:forecast-continuous-growth assumes that Y is compounded continuously (e.g., each second or fraction of a second). The constant and growth-rate are the parameters of the trend-line

Y = constant * e(growth-rate * t)

matrix:forecast-continuous-growth is the “calculus” analog of matrix:forecast-compound-growth. The two will normally yield similar (but not identical) results, as shown in the example below. growth-rate may, of course, be negative.

NOTE: The continuous growth forecast is achieved by taking the ln of Y. (See matrix:regress, below.) Because it is impossible to take the natural log of zero or a negative number, matrix:forecast-continuous-growth will result in an error if it finds a zero or negative number in data-list.

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