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anonymous
 5 years ago
Is there a way for me to access only certain elements in a 2D array, for example the vertical elements only or the first elements in a set of ordered pairs, in Python?
anonymous
 5 years ago
Is there a way for me to access only certain elements in a 2D array, for example the vertical elements only or the first elements in a set of ordered pairs, in Python?

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.02D arrays? you mean lists of lists, or python's array module, or do you mean numpy's arrays?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0lists of lists: A = [[1,0,0], [0,1,0], [0,0,1]] if you only want to get out the 'columns' then you can transpose it using list comprehensions.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0or you can simply loop: col2 = [] for row in A: col2.append(row[1]) # gets out the elements in the 2nd "column"

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0list comprehensions: col2 = [row[1] for row in A]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0sets of ordered pairs? you mean Python's native set() ?
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