【Python】np.linspace用法介绍
np.linspace主要用来创建等差数列。 参数:
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)
参数含义:
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
使用例子:
>>> 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)
