feedback: Feedback of a Partially Specified System

In LoopAnalyst: A Collection of Tools to Conduct Levins' Loop Analysis

Description

Computes the qualitative feedback of a partially specified system; where qualitative means direction: increases, decreases, no change, or ambiguous.

Usage

feedback(C)

Arguments

C	A (-1, 0 1) square matrix.

Details

The supplied matrix is validated as a square (-1, 0, 1) matrix, and the sign-corrected product of system-spanning sets of disjunct loops is summed over all levels of feedback, and the result returned. Ambiguous results are returned as NA.

Value

-1, 0, 1, or NA

Author(s)

Alexis Dinno https://www.alexisdinno.com/LoopAnalyst/

References

Puccia, C. J. and Levins, R. (1986) Qualitative Modeling of Complex Systems: An Introduction to Loop Analysis and Time Averaging. Cambridge: Harvard University Press.

See Also

make.cm.

Examples

## compute the feedback of a system
data(submatrix)
feedback(submatrix)

LoopAnalyst documentation built on May 2, 2019, 5:14 a.m.