AFNI program: 3dANOVA3

Program:          3dANOVA3 
Author:           B. Douglas Ward 
Initial Release:  29 Jan 1997 
Latest Revision:  19 Jul 2004 

This program performs three-factor ANOVA on 3D data sets.           

Usage: 
3dANOVA3 
-type  k          type of ANOVA model to be used:                     
                         k = 1   A,B,C fixed;          AxBxC          
                         k = 2   A,B,C random;         AxBxC          
                         k = 3   A fixed; B,C random;  AxBxC          
                         k = 4   A,B fixed; C random;  AxBxC          
                         k = 5   A,B fixed; C random;  AxB,BxC,C(A)   
                                                                      
-alevels a                     a = number of levels of factor A       
-blevels b                     b = number of levels of factor B       
-clevels c                     c = number of levels of factor C       
-dset 1 1 1 filename           data set for level 1 of factor A       
                                        and level 1 of factor B       
                                        and level 1 of factor C       
 . . .                           . . .                                
                                                                      
-dset i j k filename           data set for level i of factor A       
                                        and level j of factor B       
                                        and level k of factor C       
 . . .                           . . .                                
                                                                      
-dset a b c filename           data set for level a of factor A       
                                        and level b of factor B       
                                        and level c of factor C       
                                                                      
[-voxel num]                   screen output for voxel # num          
[-diskspace]                   print out disk space required for      
                                  program execution                   
                                                                      
                                                                      
The following commands generate individual AFNI 2 sub-brick datasets: 
  (In each case, output is written to the file with the specified     
   prefix file name.)                                                 
                                                                      
[-fa prefix]                F-statistic for factor A effect           
[-fb prefix]                F-statistic for factor B effect           
[-fc prefix]                F-statistic for factor C effect           
[-fab prefix]               F-statistic for A*B interaction           
[-fac prefix]               F-statistic for A*C interaction           
[-fbc prefix]               F-statistic for B*C interaction           
[-fabc prefix]              F-statistic for A*B*C interaction         
                                                                      
[-amean i prefix]           estimate of factor A level i mean         
[-bmean i prefix]           estimate of factor B level i mean         
[-cmean i prefix]           estimate of factor C level i mean         
[-xmean i j k prefix]       estimate mean of cell at factor A level i,
                               factor B level j, factor C level k     
                                                                      
[-adiff i j prefix]         difference between factor A levels i and j
[-bdiff i j prefix]         difference between factor B levels i and j
[-cdiff i j prefix]         difference between factor C levels i and j
[-xdiff i j k l m n prefix] difference between cell mean at A=i,B=j,  
                               C=k, and cell mean at A=l,B=m,C=n      
                                                                      
[-acontr c1...ca prefix]    contrast in factor A levels               
[-bcontr c1...cb prefix]    contrast in factor B levels               
[-ccontr c1...cc prefix]    contrast in factor C levels               
                                                                      
                                                                      
The following command generates one AFNI 'bucket' type dataset:       
                                                                      
[-bucket prefix]         create one AFNI 'bucket' dataset whose       
                           sub-bricks are obtained by concatenating   
                           the above output files; the output 'bucket'
                           is written to file with prefix file name   


N.B.: For this program, the user must specify 1 and only 1 sub-brick  
      with each -dset command. That is, if an input dataset contains  
      more than 1 sub-brick, a sub-brick selector must be used, e.g.: 
      -dset 2 4 5 'fred+orig[3]'                                      

INPUT DATASET NAMES
-------------------
This program accepts datasets that are modified on input according to the
following schemes:
  'r1+orig[3..5]'                                    {sub-brick selector}
  'r1+orig<100.200>'                                 {sub-range selector}
  'r1+orig[3..5]<100..200>'                          {both selectors}
  '3dcalc( -a r1+orig -b r2+orig -expr 0.5*(a+b) )'  {calculation}
For the gruesome details, see the output of 'afni -help'.