Programmatically add column names to numpy ndarray

Question

I\'m trying to add column names to a numpy ndarray, then select columns by their names. But it doesn\'t work. I can\'t tell if the problem occurs when I add the names, or late

Answer 1

Unfortunately, I don't know what is going on when you try to add the field names, but I do know that you can build the array you want directly from the file via

data = np.genfromtxt(csv_file, delimiter=',', names=True)

EDIT:

It seems like adding field names only works when the input is a list of tuples:

data = np.array(map(tuple,data), [(n, 'float64') for n in csv_names])