What is the function of ratioinfo in recommendation action sets?

jhw_ — Mon, 18 Feb 2019 01:44:05 GMT

Hi I'm using recommendation action sets.

There is ratioinfo option in recomAls and recomKnnTrain action . well I can't find information about why ratioinfo affects model I made.

is it for considering bias of user?

please help me!

proc cas;
recommend.recomKnnTrain result=r /
  table='ratings_by_user'
  label='knn3'
  system='movieRecommend'
  similarity='similar_items'                              
  k=20                                                                                                           
  hold='holdout_users'
  rateinfo='avg_user'                                   
  user=False;                                                      
run;

print r;
run;



proc cas;
recommend.recomAls result = r /
    tableU="ratings_by_user"                     
    tableI="ratings_by_item"                  
    system="movieRecommend"
    label="als1"
    casOutU={name="als_u1" replace=true}
    casOutI={name="als_i1" replace=true}
    rateinfo="avg_user"
    maxIter=20                                                   
    hold = "holdout_users"                  
    seed = 1234
    details = True                      
    k=50                                                                        
    /*fconv=1e-6 */
    stagnation = 10                         
    threshold = 0.1 ;                     
run;

Re: What is the function of ratioinfo in recommendation action sets?

joeFurbee — Mon, 08 Apr 2019 18:34:50 GMT

Hi @jhw_,

Do you mean rateinfo vs ratioinfo? If so, you can find more info in SAS Documentation for recomAls Action. rateinfo has the following definition:

specifies the in-memory table that contains the rating summary information. Typically, the table contains the average rating for an item or the average rating by a user. The recomRateinfo action can be used to create these tables.

Moreover recomRateInfo action has the following:

Summarizes rating information.

Hope this is what you were looking for.

topic What is the function of ratioinfo in recommendation action sets? in Developers

What is the function of ratioinfo in recommendation action sets?

Re: What is the function of ratioinfo in recommendation action sets?

rateInfo={castable}