Difference between revisions of "Gamefmri:AlphaSim"

Revision as of 17:11, 24 July 2008

AlphaSim is used to do a monte carlo simulation to estimate false discovery rates.

The command we use based on the slice prescription for the gamefmri project is:

 AlphaSim -nxyz 64 64 24 -dxyz 3.75 3.75 4 -iter 10000 -pthr .001 -fwhm 4 

I need to do even more iterations here.

 AlphaSim -nxyz 64 64 24 -dxyz 3.75 3.75 4 -iter 100000 -pthr .001 -fwhm 4 -quiet -fast

AlphaSim -nxyz 64 64 24 -dxyz 3.75 3.75 4

-iter 100000 -pthr .001 -fwhm 4 -quiet -fast

++ AlphaSim: AFNI version=AFNI_2008_02_01_1144 (Jul 3 2008) [32-bit] ++ Authored by: B. Douglas Ward ++ default NN connectivity being used

Program: AlphaSim Author: B. Douglas Ward Initial Release: 18 June 1997 Latest Revision: 10 Jan 2008

Data set dimensions: nx = 64 ny = 64 nz = 24 (voxels) dx = 3.75 dy = 3.75 dz = 4.00 (mm)

Gaussian filter widths: sigmax = 1.70 FWHMx = 4.00 sigmay = 1.70 FWHMy = 4.00 sigmaz = 1.70 FWHMz = 4.00

Cluster connection = Nearest Neighbor Threshold probability: pthr = 1.000000e-03

Number of Monte Carlo iterations = 100000

Cl Size Frequency CumuProp p/Voxel Max Freq Alpha

     1       8754479    0.942821  0.00100385        482    1.000000
     2        484826    0.995034  0.00011330      62539    0.995180
     3         40988    0.999449  0.00001466      31987    0.369790
     4          4503    0.999934  0.00000215       4377    0.049920
     5           543    0.999992  0.00000032        542    0.006150
     6            60    0.999999  0.00000005         60    0.000730
     7            10    1.000000  0.00000001         10    0.000130
     8             2    1.000000  0.00000000          2    0.000030
     9             0    1.000000  0.00000000          0    0.000010
    10             1    1.000000  0.00000000          1    0.000010