pathsToBinary: Converts the result from pathRanker into something suitable...

In aiminy/NetPathMiner: NetPathMiner for Biological Network Construction, Path Mining and Visualization

Description

Converts the result from pathRanker into something suitable for pathClassifier or pathCluster.

Usage

pathsToBinary(ypaths)

Arguments

ypaths

The result of pathRanker.

Details

Converts a set of pathways from pathRanker into a list of binary pathway matrices. If the pathways are grouped by a response label then the pathsToBinary returns a list labeled by response class where each element is the binary pathway matrix for each class. If the pathways are from pathRanker then a list wiht a single element containing the binary pathway matrix is returned. To look up the structure of a specific binary path in the corresponding ypaths object simply use matrix index by calling ypaths[[ybinpaths\$pidx[i,]]], where i is the row in the binary paths object you wish to reference.

Value

A list with the following elements.

paths	All paths within ypaths converted to a binary string and concatenated into the one matrix.
y	The response variable.
pidx	An matrix where each row specifies the location of that path within the ypaths object.

Author(s)

Timothy Hancock and Ichigaku Takigawa

See Also

Other Path clustering & classification methods: pathClassifier, pathCluster, plotClassifierROC, plotClusterMatrix, plotPathClassifier, plotPathCluster, predictPathClassifier, predictPathCluster

Examples

	## Prepare a weighted reaction network.
	## Conver a metabolic network to a reaction network.
 data(ex_sbml) # bipartite metabolic network of Carbohydrate metabolism.
 rgraph <- makeReactionNetwork(ex_sbml, simplify=TRUE)

	## Assign edge weights based on Affymetrix attributes and microarray dataset.
 # Calculate Pearson's correlation.
	data(ex_microarray)	# Part of ALL dataset.
	rgraph <- assignEdgeWeights(microarray = ex_microarray, graph = rgraph,
		weight.method = "cor", use.attr="miriam.uniprot", 
		y=factor(colnames(ex_microarray)), bootstrap = FALSE)

	## Get ranked paths using probabilistic shortest paths.
 ranked.p <- pathRanker(rgraph, method="prob.shortest.path", 
					K=20, minPathSize=6)
	
	## Convert paths to binary matrix. 
	ybinpaths <- pathsToBinary(ranked.p)
	p.cluster <- pathCluster(ybinpaths, M=3)
	plotClusters(ybinpaths, p.cluster, col=c("red", "green", "blue") )
 

aiminy/NetPathMiner documentation built on May 12, 2019, 3:38 a.m.