mRMRe (version 2.1.2.1)

mim: Accessor function for the 'mim' information in a mRMRe.Data, mRMRe.Filter and mRMRe.Network object

Description

In both mRMRe.Filter and mRMRe.Network objects, a sparse mutual information matrix is computed for the mRMRe procedure and this lazy-evaluated matrix is returned. In the context of a a mRMRe.Data 'mim', the full pairwise mutual information matrix is computed and returned.

Usage

# S4 method for mRMRe.Data
mim(object, prior_weight, continuous_estimator, outX, bootstrap_count)
# S4 method for mRMRe.Filter
mim(object, method)
# S4 method for mRMRe.Network
mim(object)

Arguments

object

a mRMRe.Data, mRMRe.Filter or mRMRe.Network object.

prior_weight

a numeric value [0,1] of indicating the impact of priors (mRMRe.Data only).

continuous_estimator

an estimator of the mutual information between features: either "pearson", "spearman", "kendall", "frequency" (mRMRe.Data only).

outX

a boolean used in the concordance index estimator to keep or throw out ties (mRMRe.Data only).

bootstrap_count

an integer indicating the number of bootstrap resampling used in estimation (mRMRe.Data only).

method

either "mi" or "cor"; the latter will return the correlation coefficients (rho) while the former will return the mutual information (-0.5 * log(1 - (rho^2))).

Author

Nicolas De Jay, Simon Papillon-Cavanagh, Benjamin Haibe-Kains

Examples

set.thread.count(2)
data(cgps)
feature_data <- mRMR.data(data =  data.frame(cgps.ge))

# Calculate the pairwise mutual information matrix
mim(feature_data)
filter <- mRMR.classic("mRMRe.Filter", data = feature_data, target_indices = 3:5,
						feature_count = 2)

# Obtain the sparse (lazy-evaluated) mutual information matrix.
mim(filter)