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/* créer la table des fréquences des modalités des variables par individu (0 ou 1)*/ 
proc corresp data=essai outf=freqs noprint; 
tables id, voit prof situ age; 
run; 
  
/* créer le tableau disjonctif complet */ 
proc transpose data=freqs out=rfreqs; 
where _type_ eq 'OBSERVED'; 
var count; 
id column; 
by row; 
run;

METHOD = PRINCIPAL, PRINIT, ULS et IMAGE.

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Data CORREL (type = corr) ; 
Input _type_ $ _name_ $ var1 var2 --- varn ; 
Cards ; 
CORR var1 1.0 
CORR var2 cor(var2, var1) 1.0 
CORR vari cor(vari, var1) --- cor(vari, var(i-1)) 1.0 
CORR varn cor(varn, var1) --- cor(vari, var(i-1)) 1.0 
WEIGHT W(var1) W(var2) --- W(vari) W(varn); 
  
proc FACTOR data = CORREL method = principal 
rotate = varimax outstat = RESUL weight ; 
run ;

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data correl(type=corr); 
input _TYPE_ $ 1-6 _NAME_ $ @11 x y z; 
datalines; 
CORR x 1.0 . . 
CORR y .7 1.0 . 
CORR z .5 .4 1.0 
WEIGHT 5 3 1 
; 
proc factor weight; 
run;