AFNI program: 3dANOVA2

Program:          3dANOVA2 
Author:           B. Douglas Ward 
Initial Release:  09 Dec 1996 
Latest Revision:  02 Dec 2002 

This program performs two-factor ANOVA on 3D data sets 

Usage: 
3dANOVA2 
-type k          type of ANOVA model to be used:                      
                    k=1  fixed effects model  (A and B fixed)         
                    k=2  random effects model (A and B random)        
                    k=3  mixed effects model  (A fixed, B random)     
                                                                      
-alevels a                     a = number of levels of factor A       
-blevels b                     b = number of levels of factor B       
-dset 1 1 filename             data set for level 1 of factor A       
                                        and level 1 of factor B       
 . . .                           . . .                                
                                                                      
-dset i j filename             data set for level i of factor A       
                                        and level j of factor B       
 . . .                           . . .                                
                                                                      
-dset a b filename             data set for level a of factor A       
                                        and level b of factor B       
                                                                      
[-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.)                                                 
                                                                      
[-ftr prefix]                F-statistic for treatment effect         
[-fa prefix]                 F-statistic for factor A effect          
[-fb prefix]                 F-statistic for factor B effect          
[-fab prefix]                F-statistic for interaction              
[-amean i prefix]            estimate mean of factor A level i        
[-bmean j prefix]            estimate mean of factor B level j        
[-xmean i j prefix]          estimate mean of cell at level i of      
                                factor A, level j of factor B         
[-adiff i j prefix]          difference between levels i and j of     
                                factor A                              
[-bdiff i j prefix]          difference between levels i and j of     
                                factor B                              
[-xdiff i j k l prefix]      difference between cell mean at A=i,B=j  
                                and cell mean at A=k,B=l              
[-acontr c1 ... ca prefix]   contrast in factor A levels              
[-bcontr c1 ... cb prefix]   contrast in factor B levels              
[-xcontr c11 ... c1b c21 ... c2b  ...  ca1 ... cab  prefix]           
                             contrast in cell means                   
                                                                      
                                                                      
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 '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'.