Simple reshape of numpy array: error: 'total size of new array must be unchanged'












3














Here is a very straightforward version of the problem i am having reshaping a 40*1 array into a 20*2 array. What is going wrong here?



import numpy as np
x=np.linspace(1,20,40)
#confirm length is 40
print(np.shape(x))
#reshape to 2*20
print(np.reshape(x,2,20))
#returns error: 'total size of new array must be unchanged'









share|improve this question
























  • let me know if my answer helps
    – seralouk
    Nov 22 '18 at 22:58












  • You haven't read the docs closely enough
    – Nils Werner
    Nov 22 '18 at 22:58










  • @seralouk yes, it answers my question exactly. thanks!
    – HMReliable
    Nov 22 '18 at 23:00
















3














Here is a very straightforward version of the problem i am having reshaping a 40*1 array into a 20*2 array. What is going wrong here?



import numpy as np
x=np.linspace(1,20,40)
#confirm length is 40
print(np.shape(x))
#reshape to 2*20
print(np.reshape(x,2,20))
#returns error: 'total size of new array must be unchanged'









share|improve this question
























  • let me know if my answer helps
    – seralouk
    Nov 22 '18 at 22:58












  • You haven't read the docs closely enough
    – Nils Werner
    Nov 22 '18 at 22:58










  • @seralouk yes, it answers my question exactly. thanks!
    – HMReliable
    Nov 22 '18 at 23:00














3












3








3


1





Here is a very straightforward version of the problem i am having reshaping a 40*1 array into a 20*2 array. What is going wrong here?



import numpy as np
x=np.linspace(1,20,40)
#confirm length is 40
print(np.shape(x))
#reshape to 2*20
print(np.reshape(x,2,20))
#returns error: 'total size of new array must be unchanged'









share|improve this question















Here is a very straightforward version of the problem i am having reshaping a 40*1 array into a 20*2 array. What is going wrong here?



import numpy as np
x=np.linspace(1,20,40)
#confirm length is 40
print(np.shape(x))
#reshape to 2*20
print(np.reshape(x,2,20))
#returns error: 'total size of new array must be unchanged'






python numpy reshape numpy-ndarray






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share|improve this question













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edited Nov 22 '18 at 23:18









seralouk

5,66522338




5,66522338










asked Nov 22 '18 at 22:55









HMReliable

185




185












  • let me know if my answer helps
    – seralouk
    Nov 22 '18 at 22:58












  • You haven't read the docs closely enough
    – Nils Werner
    Nov 22 '18 at 22:58










  • @seralouk yes, it answers my question exactly. thanks!
    – HMReliable
    Nov 22 '18 at 23:00


















  • let me know if my answer helps
    – seralouk
    Nov 22 '18 at 22:58












  • You haven't read the docs closely enough
    – Nils Werner
    Nov 22 '18 at 22:58










  • @seralouk yes, it answers my question exactly. thanks!
    – HMReliable
    Nov 22 '18 at 23:00
















let me know if my answer helps
– seralouk
Nov 22 '18 at 22:58






let me know if my answer helps
– seralouk
Nov 22 '18 at 22:58














You haven't read the docs closely enough
– Nils Werner
Nov 22 '18 at 22:58




You haven't read the docs closely enough
– Nils Werner
Nov 22 '18 at 22:58












@seralouk yes, it answers my question exactly. thanks!
– HMReliable
Nov 22 '18 at 23:00




@seralouk yes, it answers my question exactly. thanks!
– HMReliable
Nov 22 '18 at 23:00












1 Answer
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3














You do not use the function as you should use it.



Simply use this:



np.reshape(x,(2,20))


Documentation here



Full code:



import numpy as np
x=np.linspace(1,20,40)
#confirm length is 40
print(np.shape(x))
print(np.reshape(x,(2,20)))





share|improve this answer





















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    1 Answer
    1






    active

    oldest

    votes








    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    3














    You do not use the function as you should use it.



    Simply use this:



    np.reshape(x,(2,20))


    Documentation here



    Full code:



    import numpy as np
    x=np.linspace(1,20,40)
    #confirm length is 40
    print(np.shape(x))
    print(np.reshape(x,(2,20)))





    share|improve this answer


























      3














      You do not use the function as you should use it.



      Simply use this:



      np.reshape(x,(2,20))


      Documentation here



      Full code:



      import numpy as np
      x=np.linspace(1,20,40)
      #confirm length is 40
      print(np.shape(x))
      print(np.reshape(x,(2,20)))





      share|improve this answer
























        3












        3








        3






        You do not use the function as you should use it.



        Simply use this:



        np.reshape(x,(2,20))


        Documentation here



        Full code:



        import numpy as np
        x=np.linspace(1,20,40)
        #confirm length is 40
        print(np.shape(x))
        print(np.reshape(x,(2,20)))





        share|improve this answer












        You do not use the function as you should use it.



        Simply use this:



        np.reshape(x,(2,20))


        Documentation here



        Full code:



        import numpy as np
        x=np.linspace(1,20,40)
        #confirm length is 40
        print(np.shape(x))
        print(np.reshape(x,(2,20)))






        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Nov 22 '18 at 22:57









        seralouk

        5,66522338




        5,66522338






























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