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You can try this import pandas as pd import numpy as np filename = ‘datacsv’ df1 = pdread_csv(filename) #convert dataframe to matrix conv_arr= df1values #split matrix into 3 columns each into 1d array arr1 = npdelete(conv_arr[12]axis=1) arr2 = npdelete(conv_arr[02]axis=1) arr3 = npdelete(conv_arr[01]axis=1) #converting into 1D array.

Error in Python script "Expected 2D array, got 1D array

@stackoverflowuser2010 I’d guess the last line clfpredict() since X is already twodimensional (useless reshape notwithstanding) – Mark Dickinson Aug 7 ’17 at 1908 @MarkDickinson Yes the last line is – JonTargaryen Aug 7 ’17 at 1909 2 @JonTargaryen the reshape is in the right place but you are discarding the result Assign the result back to X –.

python From ND to 1D arrays Stack Overflow

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ravel() returns a view when the 1D elements are contiguous in memory but would return a copy if for example a were made from slicing another array using a nonunit step size (eg a = x[2]) If you want a copy rather than a view use In [15] c = aflatten() If you just want an iterator use npndarrayflat In [20] d = aflat In [21] d Out[21] In.