Numpy

常见函数说明

• np.linspace 主要用来创建 等差数列

注意

numpy.linspace(start, stop, num=50, endpoint=True, retstep=False, dtype=None, axis=0)

Return evenly spaced numbers over a specified interval.(在start和stop之间返回均匀间隔的数据)

Returns num evenly spaced samples, calculated over the interval [start, stop].

(返回的是 [start, stop]之间的均匀分布)

The endpoint of the interval can optionally be excluded.

Changed in version 1.16.0: Non-scalar start and stop are now supported. (可以选择是否排除间隔的终点)

重要

start:返回样本数据开始点

stop:返回样本数据结束点

num:生成的样本数据量，默认为50

endpoint：True则包含stop；False则不包含stop

retstep：If True, return (samples, step), where step is the spacing between samples.(即如果为True则结果会给出数据间隔)

dtype：输出数组类型

axis：0(默认)或-1