numpy.linspace¶

numpy.
linspace
(start, stop, num=50, endpoint=True, retstep=False, dtype=None, axis=0)[source]¶ Return evenly spaced numbers over a specified interval.
Returns num evenly spaced samples, calculated over the interval [start, stop].
The endpoint of the interval can optionally be excluded.
Changed in version 1.16.0: Nonscalar start and stop are now supported.
Parameters:  start : array_like
The starting value of the sequence.
 stop : array_like
The end value of the sequence, unless endpoint is set to False. In that case, the sequence consists of all but the last of
num + 1
evenly spaced samples, so that stop is excluded. Note that the step size changes when endpoint is False. num : int, optional
Number of samples to generate. Default is 50. Must be nonnegative.
 endpoint : bool, optional
If True, stop is the last sample. Otherwise, it is not included. Default is True.
 retstep : bool, optional
If True, return (samples, step), where step is the spacing between samples.
 dtype : dtype, optional
The type of the output array. If
dtype
is not given, infer the data type from the other input arguments.New in version 1.9.0.
 axis : int, optional
The axis in the result to store the samples. Relevant only if start or stop are arraylike. By default (0), the samples will be along a new axis inserted at the beginning. Use 1 to get an axis at the end.
New in version 1.16.0.
Returns:  samples : ndarray
There are num equally spaced samples in the closed interval
[start, stop]
or the halfopen interval[start, stop)
(depending on whether endpoint is True or False). step : float, optional
Only returned if retstep is True
Size of spacing between samples.
See also
Examples
>>> np.linspace(2.0, 3.0, num=5) array([2. , 2.25, 2.5 , 2.75, 3. ]) >>> np.linspace(2.0, 3.0, num=5, endpoint=False) array([2. , 2.2, 2.4, 2.6, 2.8]) >>> np.linspace(2.0, 3.0, num=5, retstep=True) (array([2. , 2.25, 2.5 , 2.75, 3. ]), 0.25)
Graphical illustration:
>>> import matplotlib.pyplot as plt >>> N = 8 >>> y = np.zeros(N) >>> x1 = np.linspace(0, 10, N, endpoint=True) >>> x2 = np.linspace(0, 10, N, endpoint=False) >>> plt.plot(x1, y, 'o') [<matplotlib.lines.Line2D object at 0x...>] >>> plt.plot(x2, y + 0.5, 'o') [<matplotlib.lines.Line2D object at 0x...>] >>> plt.ylim([0.5, 1]) (0.5, 1) >>> plt.show()