How do I access and modify Python arrays using boolean operators?

Question

I would like to know how to execute the following MATLAB statement in Python:

X(0.80 < X & X < 1) = 1;

The statement says Put 1 in the indices where the value of X is between 0.8 and 1

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I'm looking for a solution in NumPy arrays of Python lists.

Thank.

I tried:

X[X > 0.8 and X < 1]

but he says: ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()

+3

Chiba 03 June 15 at 16:18

1 answer

chrisaycock · Accepted Answer · 2015-06-03T16:21:29+0000

This is an order-of-work issue, so use parentheses:

X[(X > 0.8) & (X < 1)]

Note that I am also using ampersand instead of and

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