Cost function for Sudoku











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I am trying to create a cost function in Python for my 9x9 Sudoku grid (shown below):



 m = m

 vals = np.arange(1,10)

 for i in range(0,9):   #to do the same for columns 

      m[:,i] = np.random.choice(vals,size=9,replace=False)

 print(m.astype(int))


I need the cost function to return a 1 if duplication in the columns so that I can then sum these to get an overall score for the grid, before implementing a loop to randomly sample from 1 to 9 until the score reaches 0 and hence is solved.



My current attempt is below:



 for j in (1,9):

 if m[1,j] == m[:,j]:

    return 1

 return 0


I am looking to try it for 1 column first then expand as I get more confident with the code.



This is just the first condition for my cost function but as I'm new to Python this is causing an issue to implement. Can anyone show me along the right lines please.






python python-3.x sudoku







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  • 2




    what have you tried as cost function? (post the code please). where did you get stuck? please also post your grid as code here (and not as image).
    – hiro protagonist
    Nov 8 at 11:24












  • Made changes to original post.
    – Hew.r
    Nov 8 at 11:43















up vote
-5
down vote

favorite












I am trying to create a cost function in Python for my 9x9 Sudoku grid (shown below):



 m = m

 vals = np.arange(1,10)

 for i in range(0,9):   #to do the same for columns 

      m[:,i] = np.random.choice(vals,size=9,replace=False)

 print(m.astype(int))


I need the cost function to return a 1 if duplication in the columns so that I can then sum these to get an overall score for the grid, before implementing a loop to randomly sample from 1 to 9 until the score reaches 0 and hence is solved.



My current attempt is below:



 for j in (1,9):

 if m[1,j] == m[:,j]:

    return 1

 return 0


I am looking to try it for 1 column first then expand as I get more confident with the code.



This is just the first condition for my cost function but as I'm new to Python this is causing an issue to implement. Can anyone show me along the right lines please.






python python-3.x sudoku







share|improve this question









New contributor




Hew.r is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
















  • 2




    what have you tried as cost function? (post the code please). where did you get stuck? please also post your grid as code here (and not as image).
    – hiro protagonist
    Nov 8 at 11:24












  • Made changes to original post.
    – Hew.r
    Nov 8 at 11:43













up vote
-5
down vote

favorite









up vote
-5
down vote

favorite











I am trying to create a cost function in Python for my 9x9 Sudoku grid (shown below):



 m = m

 vals = np.arange(1,10)

 for i in range(0,9):   #to do the same for columns 

      m[:,i] = np.random.choice(vals,size=9,replace=False)

 print(m.astype(int))


I need the cost function to return a 1 if duplication in the columns so that I can then sum these to get an overall score for the grid, before implementing a loop to randomly sample from 1 to 9 until the score reaches 0 and hence is solved.



My current attempt is below:



 for j in (1,9):

 if m[1,j] == m[:,j]:

    return 1

 return 0


I am looking to try it for 1 column first then expand as I get more confident with the code.



This is just the first condition for my cost function but as I'm new to Python this is causing an issue to implement. Can anyone show me along the right lines please.






python python-3.x sudoku







share|improve this question









New contributor




Hew.r is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











I am trying to create a cost function in Python for my 9x9 Sudoku grid (shown below):



 m = m

 vals = np.arange(1,10)

 for i in range(0,9):   #to do the same for columns 

      m[:,i] = np.random.choice(vals,size=9,replace=False)

 print(m.astype(int))


I need the cost function to return a 1 if duplication in the columns so that I can then sum these to get an overall score for the grid, before implementing a loop to randomly sample from 1 to 9 until the score reaches 0 and hence is solved.



My current attempt is below:



 for j in (1,9):

 if m[1,j] == m[:,j]:

    return 1

 return 0


I am looking to try it for 1 column first then expand as I get more confident with the code.



This is just the first condition for my cost function but as I'm new to Python this is causing an issue to implement. Can anyone show me along the right lines please.






python python-3.x sudoku




python python-3.x sudoku






share|improve this question









New contributor




Hew.r is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|improve this question









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Hew.r is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









share|improve this question




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edited Nov 8 at 14:51









Alan Birtles

7,332733




7,332733






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asked Nov 8 at 11:22









Hew.r

13




13




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New contributor





Hew.r is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






Hew.r is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.








  • 2




    what have you tried as cost function? (post the code please). where did you get stuck? please also post your grid as code here (and not as image).
    – hiro protagonist
    Nov 8 at 11:24












  • Made changes to original post.
    – Hew.r
    Nov 8 at 11:43














  • 2




    what have you tried as cost function? (post the code please). where did you get stuck? please also post your grid as code here (and not as image).
    – hiro protagonist
    Nov 8 at 11:24












  • Made changes to original post.
    – Hew.r
    Nov 8 at 11:43








2




2




what have you tried as cost function? (post the code please). where did you get stuck? please also post your grid as code here (and not as image).
– hiro protagonist
Nov 8 at 11:24






what have you tried as cost function? (post the code please). where did you get stuck? please also post your grid as code here (and not as image).
– hiro protagonist
Nov 8 at 11:24














Made changes to original post.
– Hew.r
Nov 8 at 11:43




Made changes to original post.
– Hew.r
Nov 8 at 11:43

















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