numpy.arange¶

numpy.
arange
([start, ]stop, [step, ]dtype=None)¶ Return evenly spaced values within a given interval.
Values are generated within the halfopen interval
[start, stop)
(in other words, the interval including start but excluding stop). For integer arguments the function is equivalent to the Python builtin range function, but returns an ndarray rather than a list.When using a noninteger step, such as 0.1, the results will often not be consistent. It is better to use
linspace
for these cases.Parameters: start : number, optional
Start of interval. The interval includes this value. The default start value is 0.
stop : number
End of interval. The interval does not include this value, except in some cases where step is not an integer and floating point roundoff affects the length of out.
step : number, optional
Spacing between values. For any output out, this is the distance between two adjacent values,
out[i+1]  out[i]
. The default step size is 1. If step is specified, start must also be given.dtype : dtype
The type of the output array. If
dtype
is not given, infer the data type from the other input arguments.Returns: arange : ndarray
Array of evenly spaced values.
For floating point arguments, the length of the result is
ceil((stop  start)/step)
. Because of floating point overflow, this rule may result in the last element of out being greater than stop.See also
Examples
>>> np.arange(3) array([0, 1, 2]) >>> np.arange(3.0) array([ 0., 1., 2.]) >>> np.arange(3,7) array([3, 4, 5, 6]) >>> np.arange(3,7,2) array([3, 5])