On 7/5/06, Mathew Yeates <[EMAIL PROTECTED]> wrote:
> What is the typical way of doing the following
> starting with a 0 matrix, set all values to 1 when a certain condition
> is met, set to -1 when another condition is met, left alone if neither
> condition is met.
This works on recent versions of numpy:
>> x = asmatrix(zeros((2,2)))
>> x
matrix([[0, 0],
[0, 0]])
>> y = asmatrix(rand(2,2))
>> y
matrix([[ 0.85219404, 0.48311427],
[ 0.41026966, 0.2184193 ]])
>> x[y > 0.5] = 1
>> x[y < 0.5] = -1
>> x
matrix([[ 1, -1],
[-1, -1]])
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