使用scimath在Python中计算以10为底的对数
要使用scimath计算以10为底的对数,在Python的NumPy中使用scimath.log10()方法。该方法返回x值的以10为底的对数。如果x是标量,则返回标量;否则返回数组对象。
要使用log10()在实数x<0时返回NAN,请使用numpy.log10(然而,注意其他情况numpy.log10和这个log10是相同的,即x = 0返回-inf,x = inf返回inf,并且如果x.imag!= 0,那么返回的是复合主值)。第一个参数x是需要求以10为底的对数的值。
步骤
首先,导入所需的库-
import numpy as np
使用array()方法创建一个NumPy数组:
arr = np.array([10**1, -10**1, -10**2, 10**2, -10**3, 10**3])
显示数组-
print("Our Array...\n",arr)
检查尺寸 –
print("\nDimensions of our Array...\n",arr.ndim)
获取数据类型 –
print("\nDatatype of our Array object...\n",arr.dtype)
获取形状 −
print("\nShape of our Array object...\n",arr.shape)
使用scimath计算以10为底的对数,可以使用scimath.log10()方法−
print("\nResult (log10)...\n",np.emath.log10(arr))
示例
import numpy as np
# Creating a numpy array using the array() method
arr = np.array([10**1, -10**1, -10**2, 10**2, -10**3, 10**3])
# Display the array
print("Our Array...\n",arr)
# Check the Dimensions
print("\nDimensions of our Array...\n",arr.ndim)
# Get the Datatype
print("\nDatatype of our Array object...\n",arr.dtype)
# Get the Shape
print("\nShape of our Array object...\n",arr.shape)
# To compute the logarithm base 10 with scimath, use the scimath.log10() method in Python Numpy
print("\nResult (log10)...\n",np.emath.log10(arr))
输出
Our Array...
[ 10 -10 -100 100 -1000 1000]
Dimensions of our Array...
1
Datatype of our Array object...
int64
Shape of our Array object...
(6,)
Result (log10)...
[1.+0.j 1.+1.36437635j 2.+1.36437635j 2.+0.j
3.+1.36437635j 3.+0.j ]