Convert a 1D array to a 2D array in numpy

You want to reshape the array.

B = np.reshape(A, (-1, 2))

where -1 infers the size of the new dimension from the size of the input array.

Related Posts:

  1. numpy matrix vector multiplication
  2. Understanding NumPy’s einsum
  3. Using numpy to build an array of all combinations of two arrays
  4. What are the differences between numpy arrays and matrices? Which one should I use?
  5. ValueError: setting an array element with a sequence
  6. What is the purpose of meshgrid in Python / NumPy?
  7. Numpy ValueError: setting an array element with a sequence. This message may appear without the existing of a sequence?
  8. numpy: Invalid value encountered in true_divide
  9. How do I create an empty array/matrix in NumPy?
  10. How does numpy.newaxis work and when to use it?
  11. data type not understood
  12. Convert pandas dataframe to NumPy array
  13. How to count the occurrence of certain item in an ndarray?
  14. size of NumPy array
  15. Singular matrix issue with Numpy
  16. ValueError: all the input arrays must have same number of dimensions
  17. ValueError: setting an array element with a sequence
  18. Using Numpy Vectorize on Functions that Return Vectors
  19. Is there a NumPy function to return the first index of something in an array?
  20. How to get element-wise matrix multiplication (Hadamard product) in numpy?
  21. Numpy/Python Array Value error
  22. initialize a numpy array
  23. load csv into 2D matrix with numpy for plotting
  24. How to access the ith column of a NumPy multidimensional array?
  25. Dump a NumPy array into a csv file
  26. Python: find position of element in array
  27. Inverse of a matrix using numpy
  28. numpy with python: convert 3d array to 2d
  29. Create 3D array using Python
  30. Python: slicing a multi-dimensional array
  31. How to remove specific elements in a numpy array
  32. Add single element to array in numpy
  33. How to have an array of arrays in Python
  34. How to normalize a 2-dimensional numpy array in python less verbose?
  35. Make list of arrays in python
  36. How to fix “TypeError: len() of unsized object”
  37. TypeError: Invalid dimensions for image data when plotting array with imshow()
  38. Numpy.dot TypeError: Cannot cast array data from dtype(‘float64’) to dtype(‘S32’) according to the rule ‘safe’
  39. How to get the unit vector from a numpy array
  40. Good ways to “expand” a numpy ndarray?
  41. numpy-equivalent of list.pop?
  42. Efficiently sorting a numpy array in descending order?
  43. How to plot an array in python?
  44. TypeError: only integer arrays with one element can be converted to an index 3
  45. How to create a numpy array of all True or all False?
  46. How to create a numpy array of lists?
  47. Removing nan values from an array
  48. Python 3: Multiply a vector by a matrix without NumPy
  49. Root mean square of a function in python
  50. Numpy – add row to array
  51. Is there any numpy group by function?
  52. Mean Squared Error in Numpy?
  53. How to normalize a NumPy array to within a certain range?
  54. numpy array concatenation error: 0-d arrays can’t be concatenated
  55. inverting image in Python with OpenCV
  56. How to print the full NumPy array, without truncation?
  57. Sorting arrays in NumPy by column
  58. Conditional indexing with Numpy ndarray
  59. Numpy matrix to array
  60. How to declare an array in Python?
  61. How to define a two-dimensional array?
  62. TypeError: only integer scalar arrays can be converted to a scalar index with 1D numpy indices array
  63. TypeError: list indices must be integers or slices, not str
  64. ImportError: DLL load failed: The specified module could not be found
  65. ImportError: DLL load failed: The specified module could not be found
  66. Import Error: No module named numpy
  67. numpy max vs amax vs maximum
  68. TypeError: only size-1 arrays can be converted to Python scalars (matplotlib)
  69. What exactly does numpy.exp() do? [closed]
  70. How to make a flat list out of a list of lists
  71. Difference between import numpy and import numpy as np
  72. why numpy.ndarray is object is not callable in my simple for python loop
  73. numpy division with RuntimeWarning: invalid value encountered in double_scalars
  74. python numpy ValueError: operands could not be broadcast together with shapes
  75. How to fix ‘Object arrays cannot be loaded when allow_pickle=False’ for imdb.load_data() function?
  76. Most efficient way to find mode in numpy array
  77. ValueError: operands could not be broadcast together with shapes (5,) (30,)
  78. ValueError: Unknown label type: ‘continuous’
  79. Transpose/Unzip Function (inverse of zip)?
  80. TypeError: unhashable type: ‘numpy.ndarray’
  81. How to fix IndexError: invalid index to scalar variable
  82. Could not install packages due to a “Environment error :[error 13]: permission denied : ‘usr/local/bin/f2py'”
  83. numpy division with RuntimeWarning: invalid value encountered in double_scalars
  84. Converting list to numpy array
  85. How do I read CSV data into a record array in NumPy?
  86. How do you do natural logs (e.g. “ln()”) with numpy in Python?
  87. How do I read CSV data into a record array in NumPy?
  88. Plotting a 2D heatmap with Matplotlib
  89. How to normalize a NumPy array to a unit vector?
  90. Should I use np.absolute or np.abs?
  91. What does numpy.random.seed(0) do?
  92. ImportError: numpy.core.multiarray failed to import
  93. Factorial in numpy and scipy
  94. What does the c underscore expression `c_` do exactly?
  95. ImportError: Missing required dependencies [‘numpy’]
  96. How can I plot a confusion matrix? [duplicate]
  97. Unable to plot Double Bar, Bar plot using pyplot for ndarray
  98. Error: all the input array dimensions except for the concatenation axis must match exactly
  99. ImportError: numpy.core.multiarray failed to import
  100. Python List vs. Array – when to use?

Leave a Comment

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)