readme

##DiST codes and examples
##repository prepared by Jie Peng on  March 2019; jiepeng@ucdavis.edu
##Ref: Wong, R.K.W., T.C.M. Lee, D. Paul, and J. Peng. Fiber direction estimation, smoothing and tracking in diffusion MRI (2016). The Annals of Applied Statistics, 10(3): 1137-1156.

##R package needed:
1. dwi.internals2 (source codes included) 
2. quadprog, rgenoud, doParallel, cluster (download from cran)

##DiST codes:
1. dwi_basics.R: some basic functions 
2. dwi_fit.R: functions for direction estimation and smoothing
3. dwi_track.R: functions for fiber tracking  
4. sim-curve-new.R: codes for simulation

##example scripts:
1. single_task_estimation.R: scripts for voxel-wise direction estimation
2. single_task_smoothing.R: scripts for direction smoothing
3. single_task_tracking.R: scripts for fiber tracking 

##data:
1. pre_estimation.Rdata: voxel-wise estimation of the simulation example (sim-curve-new.R), used as inputs for direction smoothing 
2. smoothing.Rdata: direction smoothing results of the simulation example, used as inputs for fiber tracking
3. tracking.Rdata: tracking results of the simulation example.