Solved Task 2c+d
This commit is contained in:
parent
0074722ad3
commit
60db5aa861
|
@ -15,10 +15,10 @@ Example: A = np.array([[1,2,-1],[4,-2,6],[3,1,0]])
|
|||
@author: knaa
|
||||
"""
|
||||
import numpy as np
|
||||
import timeit
|
||||
|
||||
# Aufgabe 2a
|
||||
def Serie8_Aufg2(A):
|
||||
unknown = 0
|
||||
|
||||
|
||||
A = np.copy(A) #necessary to prevent changes in the original matrix A_in
|
||||
A = A.astype('float64') #change to float
|
||||
|
@ -55,7 +55,7 @@ def Serie8_Aufg2(A):
|
|||
|
||||
|
||||
if __name__ == '__main__':
|
||||
# Beispiel
|
||||
# Beispiel aus Skript
|
||||
# A = np.array([[1, 2, -1], [4, -2, 6], [3, 1, 0]])
|
||||
# b = np.array([
|
||||
# [9],
|
||||
|
@ -63,7 +63,7 @@ if __name__ == '__main__':
|
|||
# [9]
|
||||
# ])
|
||||
|
||||
# Example from Task 1
|
||||
# Beispiel aus Aufgabe 1
|
||||
A = np.array([
|
||||
[1, -2, 3],
|
||||
[-5, 4, 1],
|
||||
|
@ -77,6 +77,7 @@ if __name__ == '__main__':
|
|||
|
||||
[Q,R]=Serie8_Aufg2(A)
|
||||
|
||||
# Aufgabe 2b
|
||||
n = len(b) - 1
|
||||
QTb = Q.T @ b
|
||||
result = [0 for i in range(n+1)]
|
||||
|
@ -93,4 +94,27 @@ if __name__ == '__main__':
|
|||
|
||||
print("\nQ:\n", Q)
|
||||
print("\nR:\n", R)
|
||||
print("\Result:\n", result)
|
||||
print("\Result:\n", result)
|
||||
|
||||
# Aufgabe 2c
|
||||
t1 = timeit.repeat("Serie8_Aufg2(A)", "from __main__ import Serie8_Aufg2, A", number=100)
|
||||
t2 = timeit.repeat("np.linalg.qr(A)", "from __main__ import np, A", number=100)
|
||||
avg_t1 = np.average(t1) / 100
|
||||
avg_t2 = np.average(t2) / 100
|
||||
|
||||
print("Geschwindigkeit mit 3x3 Matrix:")
|
||||
print("Benötigte Zeit mit eigener Funktion:", avg_t1)
|
||||
print("Benötigte Zeit mit Numpy:", avg_t2)
|
||||
|
||||
# Aufgabe 2d
|
||||
Test = np.random.rand(100,100)
|
||||
t1 = timeit.repeat("Serie8_Aufg2(Test)", "from __main__ import Serie8_Aufg2, Test", number=100)
|
||||
t2 = timeit.repeat("np.linalg.qr(Test)", "from __main__ import np, Test", number=100)
|
||||
avg_t1 = np.average(t1) / 100
|
||||
avg_t2 = np.average(t2) / 100
|
||||
|
||||
print("Geschwindigkeit mit 100x100 Matrix:")
|
||||
print("Benötigte Zeit mit eigener Funktion:", avg_t1)
|
||||
print("Benötigte Zeit mit Numpy:", avg_t2)
|
||||
|
||||
# Die von Numpy zur Verfügung gestellt Funktion ist wesentlich effizienter.
|
Loading…
Reference in New Issue