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

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Loop analysis makes qualitative predictions of variable change in a system of causally interdependent variables, where "qualitative" means sign only (i.e. increases, decreases, non change, and ambiguous). This implementation includes output support for graphs in .dot file format for use with visualization software such as graphviz (graphviz.org). 'LoopAnalyst' provides tools for the construction and output of community matrices, computation and output of community effect matrices, tables of correlations, adjoint, absolute feedback, weighted feedback and weighted prediction matrices, change in life expectancy matrices, and feedback, path and loop enumeration tools.

Author
Alexis Dinno <alexis.dinno@pdx.edu>
Date of publication
2015-07-08 10:14:04
Maintainer
Alexis Dinno <alexis.dinno@pdx.edu>
License
GPL-2
Version
1.2-4
URLs

View on CRAN

Man pages

cem.corr
Compute the Tables of Correlations for a Community Effect...
cem.levins
Community Effect Matrix For A Four-Variable Trophic Model
cm.dambacher
A Ten-Variable Trophic Model Of Danish Shallow Lakes
cm.DLR
Model of Two Mosquito Life Stages With Predation and...
cm.levins
Model of A Resource, An Herbivore, And Two Predators
enumerate.loops
Enumerates all Loops in a (-1, 0, 1) Matrix
enumerate.paths
Enumerates all Paths from i to j in a Community Matrix
feedback
Feedback of a Partially Specified System
graph.cem
Graph a Community Effect Matrix
graph.cm
Graph a Community Matrix
make.adjoint
Compute the Adjoint of the Negative Community Matrix
make.cem
Compute the Community Effect Matrix
make.clem
Compute the Change in Life Expectancy Matrix
make.cm
Interactively Make a Community Matrix
make.T
Compute the Absolute Feedback Matrix of a Community Matrix
make.wfm
Compute the Weighted Feedback Matrix
out.cm
Output a Community Matrix or Community Effect Matrix in...
save.cm
Save a Community Matrix
submatrix
A Five-Variable Sub-Matrix of the First Five Variables of...
validate.cem
Validate a Community Effect Matrix
validate.cm
Validate a Community Matrix
weighted.predictions
Compute the Matrix of Weighted Predictions

Files in this package

LoopAnalyst
LoopAnalyst/NAMESPACE
LoopAnalyst/data
LoopAnalyst/data/submatrix.rda
LoopAnalyst/data/cm.DLR.rda
LoopAnalyst/data/cem.levins.rda
LoopAnalyst/data/cm.levins.rda
LoopAnalyst/data/cm.dambacher.rda
LoopAnalyst/R
LoopAnalyst/R/make.cm.R
LoopAnalyst/R/cem.corr.R
LoopAnalyst/R/weighted.predictions.R
LoopAnalyst/R/make.wfm.R
LoopAnalyst/R/feedback.R
LoopAnalyst/R/graph.cm.R
LoopAnalyst/R/validate.cem.R
LoopAnalyst/R/make.adjoint.R
LoopAnalyst/R/validate.cm.R
LoopAnalyst/R/make.clem.R
LoopAnalyst/R/enumerate.loops.R
LoopAnalyst/R/make.cem.R
LoopAnalyst/R/make.T.R
LoopAnalyst/R/enumerate.paths.R
LoopAnalyst/R/save.cm.R
LoopAnalyst/R/graph.cem.R
LoopAnalyst/R/out.cm.R
LoopAnalyst/MD5
LoopAnalyst/DESCRIPTION
LoopAnalyst/man
LoopAnalyst/man/enumerate.loops.Rd
LoopAnalyst/man/save.cm.Rd
LoopAnalyst/man/feedback.Rd
LoopAnalyst/man/submatrix.Rd
LoopAnalyst/man/make.cm.Rd
LoopAnalyst/man/cem.corr.Rd
LoopAnalyst/man/validate.cem.Rd
LoopAnalyst/man/graph.cem.Rd
LoopAnalyst/man/cm.levins.Rd
LoopAnalyst/man/make.wfm.Rd
LoopAnalyst/man/cm.dambacher.Rd
LoopAnalyst/man/make.adjoint.Rd
LoopAnalyst/man/make.T.Rd
LoopAnalyst/man/enumerate.paths.Rd
LoopAnalyst/man/cm.DLR.Rd
LoopAnalyst/man/make.clem.Rd
LoopAnalyst/man/make.cem.Rd
LoopAnalyst/man/out.cm.Rd
LoopAnalyst/man/cem.levins.Rd
LoopAnalyst/man/weighted.predictions.Rd
LoopAnalyst/man/validate.cm.Rd
LoopAnalyst/man/graph.cm.Rd