Description Usage Arguments Details Value Author(s) References Examples
The main function uses a iterative algorithm. This function calculates the starting values for the algorithm.
1 | StVal(fileDir, m = 20, N.s = 150, V = 67749)
|
fileDir |
fileDir is a file directory containing the original .rda files. |
m |
m is the number of independent components you want. |
N.s |
N.s is the number of subjects. |
V |
V is the number of observed signals. In the fMRI case, it is the number of voxels. |
We used the PVD algorithm by C.M.Crainiceanu et.al to compute starting values for our algorithm.
This function has no returned values, instead it will write the output into .rda files. The W0.rda file contains starting values for W matrix and the appi.rda files are the starting values for S.
Ani Eloyan, Shaojie Chen, Lei Huang, Huitong Qiu
Ciprian M.Crainiceanu, Brian S.Caffo, Sheng Luo, Vadim Zipunikov Population Value Decomposition, A Framework for the Analysis of Image Populations http://biostats.bepress.com/jhubiostat/paper220/
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