Thanks, I confused myself. I was looking at org.apache.spark.ml.recommendation.ALS Javadoc. Not sure why it shows up. I didn't notice the Developer API tag, so "fit" it is!
-S ________________________________ From: Sean Owen <sro...@gmail.com> Sent: Wednesday, December 2, 2020 3:51 PM To: Steve Pruitt <bpru...@opentext.com.invalid> Cc: user@spark.apache.org <user@spark.apache.org> Subject: [EXTERNAL] - Re: Spark ML / ALS question There is only a fit() method in spark.ml<https://urldefense.com/v3/__http://spark.ml__;!!Obbck6kTJA!LtadpPpSINZQ3q4vJOXQw0UmOzZShpk98OlNRZWI2LNAXfqDlnNvNbbKRr3kOTt7$>'s ALS http://spark.apache.org/docs/latest/api/scala/org/apache/spark/ml/recommendation/ALS.html<https://urldefense.com/v3/__http://spark.apache.org/docs/latest/api/scala/org/apache/spark/ml/recommendation/ALS.html__;!!Obbck6kTJA!LtadpPpSINZQ3q4vJOXQw0UmOzZShpk98OlNRZWI2LNAXfqDlnNvNbbKRgVXjH-W$> The older spark.mllib interface has a train() method. You'd generally use the spark.ml<https://urldefense.com/v3/__http://spark.ml__;!!Obbck6kTJA!LtadpPpSINZQ3q4vJOXQw0UmOzZShpk98OlNRZWI2LNAXfqDlnNvNbbKRr3kOTt7$> version. On Wed, Dec 2, 2020 at 2:13 PM Steve Pruitt <bpru...@opentext.com.invalid> wrote: I am having a little difficulty finding information on the ALS train(…) method in spark.ml<https://urldefense.com/v3/__http://spark.ml__;!!Obbck6kTJA!LtadpPpSINZQ3q4vJOXQw0UmOzZShpk98OlNRZWI2LNAXfqDlnNvNbbKRr3kOTt7$>. Its unclear when to use it. In the java doc, the parameters are undocumented. What is difference between train(..) and fit(..). When would do you use one or the other? -S
