Idr Idr - 11 months ago 90
Python Question

Shift all indices in NumPy array

I have a numpy array like this:


and want to create an array where the value in index 0 is in index 1, index 1 is in index 2, etc.

The output I want is:


I'm guessing there's an easy way to do this without iterating through the full array. How can I do this in a numPythonic way?


You can use

y = numpy.roll(x, 1)
y[0] = 0


y = numpy.r_[0, x[:-1]]