Return Value: () function returns the starting point and end point of a fixed step arrangement np.arange, such as [1,2,3,4,5], 1 is the starting point, end 5 is, in steps of 1.
The number of parameters are: np.arange () function into a parameter, two parameters, three parameters of the three cases
1) is a parameter, the parameter value of the end point, starting from the default value of 0, the default value step 1 .
2) When the two parameters, the first parameter as a starting point, the end point of the second parameter, the step a default value.
3) When the three parameters, the first parameter as a starting point, the end point of the second parameter, the third parameter is the step size. Which supports fractional step.
example:
#一个参数 默认起点0，步长为1 输出：[0 1 2]
a = np.arange(3)
#两个参数 默认步长为1 输出[3 4 5 6 7 8]
a = np.arange(3,9)
#三个参数 起点为0，终点为4，步长为0.1 输出[ 0. 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1. 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2. 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9]
a = np.arange(0, 3, 0.1)
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