What's the best classification model for this recommendation engine? Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern) 2019 Moderator Election Q&A - Questionnaire 2019 Community Moderator Election ResultsRecommended Language/Framework for Building a New Recommendation EngineRecommendation engine with mahoutCreating Data model for mahout recommendation engineBuilding Recommendation engine with Pythonusing movielens dataset build recommendation engineSVD for recommendation engineJob Recommendation EngineClassification model for recommender system?

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What's the best classification model for this recommendation engine?



Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)
2019 Moderator Election Q&A - Questionnaire
2019 Community Moderator Election ResultsRecommended Language/Framework for Building a New Recommendation EngineRecommendation engine with mahoutCreating Data model for mahout recommendation engineBuilding Recommendation engine with Pythonusing movielens dataset build recommendation engineSVD for recommendation engineJob Recommendation EngineClassification model for recommender system?










1












$begingroup$


I'm not a data scientist but I'm trying to implement a recommendation engine on my company. My application runs on PHP but I'll use Python to process this data.



My company is an online school, with 40 online courses as of now. I have a CSV file with around 30k users preferences, and it looks like this:



Dataframe



0 means that user is not subscribed (I consider here that he has no interest), while 1 means subscribed (interested).



My idea is to compare one single user array such as [0,1,0,0,0,1,1...] with all this data and return a grade for each course with the probability of interest for this user.



I was thinking of using a Multinomial Logistic Regression, but as far as I know (and I don't know much) it would return me a binary result, right?



What classification model would you recommend me to use? Ideally, my result should be something like:



[0.95, 0.1, 0.54, 0.3, 0.87...]



Cheers!










share|improve this question









$endgroup$




bumped to the homepage by Community 22 mins ago


This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.










  • 1




    $begingroup$
    Formulate the problem as a Collaborative filtering task.
    $endgroup$
    – Fadi Bakoura
    May 21 '18 at 14:52










  • $begingroup$
    Thanks @FadiBakoura, will research on this and let you know.
    $endgroup$
    – grpaiva
    May 21 '18 at 18:03











  • $begingroup$
    Can you include more information about the user? (sex, age ...) An user single with 18 years old may like a course that another 50 years old do not like ...
    $endgroup$
    – Intruso
    Aug 20 '18 at 13:50










  • $begingroup$
    Seems like a prediction problem, not one of classification, so a neural network? Have you tried loading this data into Orange3? Seems you could test out your models pretty quickly. Orange3 uses Scikit, so once you find your workflow, you can use Python. By the way, if it is a neural network solution, TensorFlow has PHP bindings, so you could do the whole thing in PHP. Both may save you time.
    $endgroup$
    – davmor
    Nov 18 '18 at 11:10
















1












$begingroup$


I'm not a data scientist but I'm trying to implement a recommendation engine on my company. My application runs on PHP but I'll use Python to process this data.



My company is an online school, with 40 online courses as of now. I have a CSV file with around 30k users preferences, and it looks like this:



Dataframe



0 means that user is not subscribed (I consider here that he has no interest), while 1 means subscribed (interested).



My idea is to compare one single user array such as [0,1,0,0,0,1,1...] with all this data and return a grade for each course with the probability of interest for this user.



I was thinking of using a Multinomial Logistic Regression, but as far as I know (and I don't know much) it would return me a binary result, right?



What classification model would you recommend me to use? Ideally, my result should be something like:



[0.95, 0.1, 0.54, 0.3, 0.87...]



Cheers!










share|improve this question









$endgroup$




bumped to the homepage by Community 22 mins ago


This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.










  • 1




    $begingroup$
    Formulate the problem as a Collaborative filtering task.
    $endgroup$
    – Fadi Bakoura
    May 21 '18 at 14:52










  • $begingroup$
    Thanks @FadiBakoura, will research on this and let you know.
    $endgroup$
    – grpaiva
    May 21 '18 at 18:03











  • $begingroup$
    Can you include more information about the user? (sex, age ...) An user single with 18 years old may like a course that another 50 years old do not like ...
    $endgroup$
    – Intruso
    Aug 20 '18 at 13:50










  • $begingroup$
    Seems like a prediction problem, not one of classification, so a neural network? Have you tried loading this data into Orange3? Seems you could test out your models pretty quickly. Orange3 uses Scikit, so once you find your workflow, you can use Python. By the way, if it is a neural network solution, TensorFlow has PHP bindings, so you could do the whole thing in PHP. Both may save you time.
    $endgroup$
    – davmor
    Nov 18 '18 at 11:10














1












1








1


1



$begingroup$


I'm not a data scientist but I'm trying to implement a recommendation engine on my company. My application runs on PHP but I'll use Python to process this data.



My company is an online school, with 40 online courses as of now. I have a CSV file with around 30k users preferences, and it looks like this:



Dataframe



0 means that user is not subscribed (I consider here that he has no interest), while 1 means subscribed (interested).



My idea is to compare one single user array such as [0,1,0,0,0,1,1...] with all this data and return a grade for each course with the probability of interest for this user.



I was thinking of using a Multinomial Logistic Regression, but as far as I know (and I don't know much) it would return me a binary result, right?



What classification model would you recommend me to use? Ideally, my result should be something like:



[0.95, 0.1, 0.54, 0.3, 0.87...]



Cheers!










share|improve this question









$endgroup$




I'm not a data scientist but I'm trying to implement a recommendation engine on my company. My application runs on PHP but I'll use Python to process this data.



My company is an online school, with 40 online courses as of now. I have a CSV file with around 30k users preferences, and it looks like this:



Dataframe



0 means that user is not subscribed (I consider here that he has no interest), while 1 means subscribed (interested).



My idea is to compare one single user array such as [0,1,0,0,0,1,1...] with all this data and return a grade for each course with the probability of interest for this user.



I was thinking of using a Multinomial Logistic Regression, but as far as I know (and I don't know much) it would return me a binary result, right?



What classification model would you recommend me to use? Ideally, my result should be something like:



[0.95, 0.1, 0.54, 0.3, 0.87...]



Cheers!







python recommender-system multiclass-classification






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked May 21 '18 at 14:34









grpaivagrpaiva

61




61





bumped to the homepage by Community 22 mins ago


This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.







bumped to the homepage by Community 22 mins ago


This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.









  • 1




    $begingroup$
    Formulate the problem as a Collaborative filtering task.
    $endgroup$
    – Fadi Bakoura
    May 21 '18 at 14:52










  • $begingroup$
    Thanks @FadiBakoura, will research on this and let you know.
    $endgroup$
    – grpaiva
    May 21 '18 at 18:03











  • $begingroup$
    Can you include more information about the user? (sex, age ...) An user single with 18 years old may like a course that another 50 years old do not like ...
    $endgroup$
    – Intruso
    Aug 20 '18 at 13:50










  • $begingroup$
    Seems like a prediction problem, not one of classification, so a neural network? Have you tried loading this data into Orange3? Seems you could test out your models pretty quickly. Orange3 uses Scikit, so once you find your workflow, you can use Python. By the way, if it is a neural network solution, TensorFlow has PHP bindings, so you could do the whole thing in PHP. Both may save you time.
    $endgroup$
    – davmor
    Nov 18 '18 at 11:10













  • 1




    $begingroup$
    Formulate the problem as a Collaborative filtering task.
    $endgroup$
    – Fadi Bakoura
    May 21 '18 at 14:52










  • $begingroup$
    Thanks @FadiBakoura, will research on this and let you know.
    $endgroup$
    – grpaiva
    May 21 '18 at 18:03











  • $begingroup$
    Can you include more information about the user? (sex, age ...) An user single with 18 years old may like a course that another 50 years old do not like ...
    $endgroup$
    – Intruso
    Aug 20 '18 at 13:50










  • $begingroup$
    Seems like a prediction problem, not one of classification, so a neural network? Have you tried loading this data into Orange3? Seems you could test out your models pretty quickly. Orange3 uses Scikit, so once you find your workflow, you can use Python. By the way, if it is a neural network solution, TensorFlow has PHP bindings, so you could do the whole thing in PHP. Both may save you time.
    $endgroup$
    – davmor
    Nov 18 '18 at 11:10








1




1




$begingroup$
Formulate the problem as a Collaborative filtering task.
$endgroup$
– Fadi Bakoura
May 21 '18 at 14:52




$begingroup$
Formulate the problem as a Collaborative filtering task.
$endgroup$
– Fadi Bakoura
May 21 '18 at 14:52












$begingroup$
Thanks @FadiBakoura, will research on this and let you know.
$endgroup$
– grpaiva
May 21 '18 at 18:03





$begingroup$
Thanks @FadiBakoura, will research on this and let you know.
$endgroup$
– grpaiva
May 21 '18 at 18:03













$begingroup$
Can you include more information about the user? (sex, age ...) An user single with 18 years old may like a course that another 50 years old do not like ...
$endgroup$
– Intruso
Aug 20 '18 at 13:50




$begingroup$
Can you include more information about the user? (sex, age ...) An user single with 18 years old may like a course that another 50 years old do not like ...
$endgroup$
– Intruso
Aug 20 '18 at 13:50












$begingroup$
Seems like a prediction problem, not one of classification, so a neural network? Have you tried loading this data into Orange3? Seems you could test out your models pretty quickly. Orange3 uses Scikit, so once you find your workflow, you can use Python. By the way, if it is a neural network solution, TensorFlow has PHP bindings, so you could do the whole thing in PHP. Both may save you time.
$endgroup$
– davmor
Nov 18 '18 at 11:10





$begingroup$
Seems like a prediction problem, not one of classification, so a neural network? Have you tried loading this data into Orange3? Seems you could test out your models pretty quickly. Orange3 uses Scikit, so once you find your workflow, you can use Python. By the way, if it is a neural network solution, TensorFlow has PHP bindings, so you could do the whole thing in PHP. Both may save you time.
$endgroup$
– davmor
Nov 18 '18 at 11:10











1 Answer
1






active

oldest

votes


















0












$begingroup$

Without more information about your dataset, it's impossible to recommend one particular classifier over another.



If you want your classifier to return a vector of probabilities, then if you're using the sklearn library, you could use the predict_proba method.



Here's an example:



from sklearn.datasets import load_digits
digits = load_digits(2)
from sklearn.linear_model import LogisticRegression
preds = LogisticRegression().fit(digits.data, digits.target).predict_proba(digits.data)
print([i[1] for i in preds])





share|improve this answer









$endgroup$












  • $begingroup$
    Thanks for your answer @Lupacante! What I don't get here is that when I print digits.data.shape and digits.target.shape I get: (360, 64) and (360,). Shouldn't the target shape be something like(64,)? My dataset's shape looks like this: (27920, 46) and (46,). I'm getting an error: ValueError: Found input variables with inconsistent numbers of samples: [27920, 46]
    $endgroup$
    – grpaiva
    May 21 '18 at 18:02











  • $begingroup$
    The predictors and target from the training set should have the same number of rows. The first number in the tuple returned by shape gives you the number of rows, so (360, 64) and (360,) is exactly what we'd expect.
    $endgroup$
    – marco_gorelli
    May 22 '18 at 8:16











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1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









0












$begingroup$

Without more information about your dataset, it's impossible to recommend one particular classifier over another.



If you want your classifier to return a vector of probabilities, then if you're using the sklearn library, you could use the predict_proba method.



Here's an example:



from sklearn.datasets import load_digits
digits = load_digits(2)
from sklearn.linear_model import LogisticRegression
preds = LogisticRegression().fit(digits.data, digits.target).predict_proba(digits.data)
print([i[1] for i in preds])





share|improve this answer









$endgroup$












  • $begingroup$
    Thanks for your answer @Lupacante! What I don't get here is that when I print digits.data.shape and digits.target.shape I get: (360, 64) and (360,). Shouldn't the target shape be something like(64,)? My dataset's shape looks like this: (27920, 46) and (46,). I'm getting an error: ValueError: Found input variables with inconsistent numbers of samples: [27920, 46]
    $endgroup$
    – grpaiva
    May 21 '18 at 18:02











  • $begingroup$
    The predictors and target from the training set should have the same number of rows. The first number in the tuple returned by shape gives you the number of rows, so (360, 64) and (360,) is exactly what we'd expect.
    $endgroup$
    – marco_gorelli
    May 22 '18 at 8:16















0












$begingroup$

Without more information about your dataset, it's impossible to recommend one particular classifier over another.



If you want your classifier to return a vector of probabilities, then if you're using the sklearn library, you could use the predict_proba method.



Here's an example:



from sklearn.datasets import load_digits
digits = load_digits(2)
from sklearn.linear_model import LogisticRegression
preds = LogisticRegression().fit(digits.data, digits.target).predict_proba(digits.data)
print([i[1] for i in preds])





share|improve this answer









$endgroup$












  • $begingroup$
    Thanks for your answer @Lupacante! What I don't get here is that when I print digits.data.shape and digits.target.shape I get: (360, 64) and (360,). Shouldn't the target shape be something like(64,)? My dataset's shape looks like this: (27920, 46) and (46,). I'm getting an error: ValueError: Found input variables with inconsistent numbers of samples: [27920, 46]
    $endgroup$
    – grpaiva
    May 21 '18 at 18:02











  • $begingroup$
    The predictors and target from the training set should have the same number of rows. The first number in the tuple returned by shape gives you the number of rows, so (360, 64) and (360,) is exactly what we'd expect.
    $endgroup$
    – marco_gorelli
    May 22 '18 at 8:16













0












0








0





$begingroup$

Without more information about your dataset, it's impossible to recommend one particular classifier over another.



If you want your classifier to return a vector of probabilities, then if you're using the sklearn library, you could use the predict_proba method.



Here's an example:



from sklearn.datasets import load_digits
digits = load_digits(2)
from sklearn.linear_model import LogisticRegression
preds = LogisticRegression().fit(digits.data, digits.target).predict_proba(digits.data)
print([i[1] for i in preds])





share|improve this answer









$endgroup$



Without more information about your dataset, it's impossible to recommend one particular classifier over another.



If you want your classifier to return a vector of probabilities, then if you're using the sklearn library, you could use the predict_proba method.



Here's an example:



from sklearn.datasets import load_digits
digits = load_digits(2)
from sklearn.linear_model import LogisticRegression
preds = LogisticRegression().fit(digits.data, digits.target).predict_proba(digits.data)
print([i[1] for i in preds])






share|improve this answer












share|improve this answer



share|improve this answer










answered May 21 '18 at 14:47









marco_gorellimarco_gorelli

4819




4819











  • $begingroup$
    Thanks for your answer @Lupacante! What I don't get here is that when I print digits.data.shape and digits.target.shape I get: (360, 64) and (360,). Shouldn't the target shape be something like(64,)? My dataset's shape looks like this: (27920, 46) and (46,). I'm getting an error: ValueError: Found input variables with inconsistent numbers of samples: [27920, 46]
    $endgroup$
    – grpaiva
    May 21 '18 at 18:02











  • $begingroup$
    The predictors and target from the training set should have the same number of rows. The first number in the tuple returned by shape gives you the number of rows, so (360, 64) and (360,) is exactly what we'd expect.
    $endgroup$
    – marco_gorelli
    May 22 '18 at 8:16
















  • $begingroup$
    Thanks for your answer @Lupacante! What I don't get here is that when I print digits.data.shape and digits.target.shape I get: (360, 64) and (360,). Shouldn't the target shape be something like(64,)? My dataset's shape looks like this: (27920, 46) and (46,). I'm getting an error: ValueError: Found input variables with inconsistent numbers of samples: [27920, 46]
    $endgroup$
    – grpaiva
    May 21 '18 at 18:02











  • $begingroup$
    The predictors and target from the training set should have the same number of rows. The first number in the tuple returned by shape gives you the number of rows, so (360, 64) and (360,) is exactly what we'd expect.
    $endgroup$
    – marco_gorelli
    May 22 '18 at 8:16















$begingroup$
Thanks for your answer @Lupacante! What I don't get here is that when I print digits.data.shape and digits.target.shape I get: (360, 64) and (360,). Shouldn't the target shape be something like(64,)? My dataset's shape looks like this: (27920, 46) and (46,). I'm getting an error: ValueError: Found input variables with inconsistent numbers of samples: [27920, 46]
$endgroup$
– grpaiva
May 21 '18 at 18:02





$begingroup$
Thanks for your answer @Lupacante! What I don't get here is that when I print digits.data.shape and digits.target.shape I get: (360, 64) and (360,). Shouldn't the target shape be something like(64,)? My dataset's shape looks like this: (27920, 46) and (46,). I'm getting an error: ValueError: Found input variables with inconsistent numbers of samples: [27920, 46]
$endgroup$
– grpaiva
May 21 '18 at 18:02













$begingroup$
The predictors and target from the training set should have the same number of rows. The first number in the tuple returned by shape gives you the number of rows, so (360, 64) and (360,) is exactly what we'd expect.
$endgroup$
– marco_gorelli
May 22 '18 at 8:16




$begingroup$
The predictors and target from the training set should have the same number of rows. The first number in the tuple returned by shape gives you the number of rows, so (360, 64) and (360,) is exactly what we'd expect.
$endgroup$
– marco_gorelli
May 22 '18 at 8:16

















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ValueError: Expected n_neighbors <= n_samples, but n_samples = 1, n_neighbors = 6 (SMOTE) The 2019 Stack Overflow Developer Survey Results Are InCan SMOTE be applied over sequence of words (sentences)?ValueError when doing validation with random forestsSMOTE and multi class oversamplingLogic behind SMOTE-NC?ValueError: Error when checking target: expected dense_1 to have shape (7,) but got array with shape (1,)SmoteBoost: Should SMOTE be ran individually for each iteration/tree in the boosting?solving multi-class imbalance classification using smote and OSSUsing SMOTE for Synthetic Data generation to improve performance on unbalanced dataproblem of entry format for a simple model in KerasSVM SMOTE fit_resample() function runs forever with no result