Hi All,I have transformed the data into following format: First column is user 
id, and then all the other columns are class ids. For a user only class ids 
that appear in this row have value 1 and others are 0.  I need to crease a 
sparse vector from this. Does the API for creating a sparse vector that can 
directly support this format?  
User id    Product class ids
2622572 145447  1620    13421   28565   285556  293     4553    67261   130     
3646    1671    18806   183576  3286    51715   57671   57476                   
                  

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