Python 中的 numpy.log10()
哎哎哎:# t0]https://www . geeksforgeeks . org/num py-log 10-python/
关于: numpy.log10(arr，out = None，*其中= True，casting = 'same_kind '，order = 'K '，dtype = None，ufunc 'log10') : 这个数学函数帮助用户计算x 的 10 底对数其中 x 属于所有输入数组元素。
参数:
array : [array_like]Input array or object.
out : [ndarray, optional]Output array with same dimensions as Input array,
placed with result.
**kwargs : allows you to pass keyword variable length of argument to a function.
It is used when we want to handle named argument in a function.
where : [array_like, optional]True value means to calculate the universal
functions(ufunc) at that position, False value means to leave the value in the
output alone.
返回:
An array with Base-10 logarithmic value of x;
where x belongs to all elements of input array.
代码 1:工作
# Python program explaining
# log10() function
import numpy as np
in_array = [1, 3, 5, 10**8]
print ("Input array : ", in_array)
out_array = np.log10(in_array)
print ("Output array : ", out_array)
print("\nnp.log10(4**4) : ", np.log10(100**4))
print("np.log10(2**8) : ", np.log10(10**8))
输出:
Input array : [1, 3, 5, 100000000]
Output array : [ 0\. 0.47712125 0.69897 8\. ]
np.log10(4**4) : 8.0
np.log10(2**8) : 8.0
代码 2:图形表示
# Python program showing
# Graphical representation of
# log10() function
import numpy as np
import matplotlib.pyplot as plt
in_array = [1, 2, 3, 4, 5]
out_array = np.log10(in_array)
print ("out_array : ", out_array)
plt.plot(in_array, in_array, color = 'blue', marker = "*")
# red for numpy.log10()
plt.plot(out_array, in_array, color = 'red', marker = "o")
plt.title("numpy.log10()")
plt.xlabel("out_array")
plt.ylabel("in_array")
plt.show()
输出:
out_array : [ 0\. 0.30103 0.47712125 0.60205999 0.69897 ]
参考文献:
