Python numpy.logspace()用法及代碼示例

關於：
numpy.logspace(開始，停止，num = 50，端點= True，基數= 10.0，dtype =無)：以對數刻度平均間隔間隔返回數字間隔。
參數：

-> start    : [float] start(base ** start) of interval range.
-> stop     : [float] end(base ** stop) of interval range
-> endpoint : [boolean, optional]If True, stop is the last sample. By default, True
-> num      : [int, optional] No. of samples to generate
-> base     : [float, optional] Base of log scale. By default, equals 10.0
-> dtype    : type of output array

返回：

-> ndarray

代碼1：解釋logspace()的使用

# Python Programming illustrating 
# numpy.logspace method 
  
import numpy as geek 
  
# base = 11 
print("B\n", geek.logspace(2.0, 3.0, num=5, base = 11)) 
  
# base = 10 
print("B\n", geek.logspace(2.0, 3.0, num=5)) 
  
# base = 10, dtype = int 
print("B\n", geek.logspace(2.0, 3.0, num=5, dtype = int))

輸出：

B
 [  121.           220.36039471   401.31159963   730.8527479   1331.        ]
B
 [  100.           177.827941     316.22776602   562.34132519  1000.        ]
B
 [ 100  177  316  562 1000]

代碼2：使用matplotlib模塊的numpy.logspace()的圖形表示-pylab

# Graphical Represenation of numpy.logspace() 
import numpy as geek 
import pylab as p 
  
# Start = 0 
# End = 2 
# Samples to generate = 10 
x1 = geek.logspace(0, 1, 10) 
y1 = geek.zeros(10) 
  
# Start = 0.1 
# End = 1.5 
# Samples to generate = 12 
x2 = geek.logspace(0.1, 1.5, 12) 
y2 = geek.zeros(12) 
  
p.plot(x1, y1+0.05, 'o') 
p.xlim(-0.2, 18) 
p.ylim(-0.5, 1) 
p.plot(x2, y2, 'x')

輸出：

注意：
這些NumPy-Python程序不會在onlineID上運行，因此請在您的係統上運行它們以進行探索

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