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MixfMRI (version 0.1-0)

Mixture fMRI Clustering Analysis

Description

Utilizing model-based clustering (unsupervised) for functional magnetic resonance imaging (fMRI) data. The developed methods (Chen and Maitra (2018, manuscript)) include 2D and 3D clustering analyses (for p-values with voxel locations) and segmentation analyses (for p-values alone) for fMRI data where p-values indicate significant level of activation responding to stimulate of interesting. The analyses are mainly identifying active voxel/signal associated with normal brain behaviors. Analysis pipelines (R scripts) utilizing this package (see examples in 'inst/workflow/') is also implemented with high performance techniques.

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Install

install.packages('MixfMRI')

Monthly Downloads

247

Version

0.1-0

License

Mozilla Public License 2.0

Issues

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Maintainer

Wei-Chen Chen

Last Published

April 26th, 2018

Functions in MixfMRI (0.1-0)

LRT

Likelihood ratio tests
Simulations

Generate datasets for MixfMRI simulations
Print Objects

Print fclust related outputs
algorithm

Main algorithms implemented in fclust
Plotting

Main plotting function
Main functions

Main MixfMRI function
MixfMRI Control

Sets of controls in MixfMRI
Example Datasets

Example datasets in MixfMRI
MixfMRI-package

fMRI Clustering Analysis
initial

Main initialization functions
Likelihood Mixture Tests with Identity Cov Matrix or Only p-values

Likelihood Mixture Tests with Identity Cov Matrix or Only p-values
Density function of p-values

Density function of p-values
False Discovery Rates for Spatial Signals

False Discovery Rates for Spatial Signals using Benjamini and Heller (2007)
Generalized Cluster-Based Analysis (CBA) Method

Generalized Cluster-Based Analysis (CBA) Method
Covariance Matrices

Covariance Matrices
Compute Q values

Q-values using Benjamini and Hochberg (1995)
Summarized Overlap

Summarized Overlap
Covariance Matrices of Logit ETA

Covariance Matrices of Logit ETA
Compute Statistics for Log Odds Ratio of Posterior Probability

Compute Statistics for Log Odds Ratio of Posterior Probability
General Internal Functions

All General Internal Functions and Datasets
Smoothing

Generate datasets with smoothing for MixfMRI simulations