import numpy as np
import matplotlib.pyplot as pltfig, axis = plt.subplots(2, 2)
fig.tight_layout()
titles = ['$Constant$', '$Linear$', '$Power 2$', '$Power 3$']
xs = np.linspace(-10, 10, 100)
for power, (ax, title) in enumerate(zip(axis.flat, titles), 1):
coeffs = np.random.uniform(-5, 5, power)
poly = np.poly1d(coeffs)
ax.plot(xs, poly(xs))
ax.set_title(title)
plt.Figure((2, 1.5))
xs = np.linspace(-10, 10, 100)
coeffs = np.array([2, 3, 4])
ys = np.dot(coeffs, [xs**2, xs**1, xs**0])
plt.plot(xs, ys)
jedinice_vektor = np.arange(5)
print(jedinice_vektor)
print('Umnožak', np.dot(jedinice_vektor, jedinice_vektor))[0 1 2 3 4]
Umnožak 30
vektor_red = np.arange(5).reshape(1, 5)
print(vektor_red)[[0 1 2 3 4]]
vektor_stupac = np.arange(0, 50, 10).reshape(5, 1)
print(vektor_stupac)[[ 0]
[10]
[20]
[30]
[40]]
print(np.dot(vektor_stupac, vektor_red))[[ 0 0 0 0 0]
[ 0 10 20 30 40]
[ 0 20 40 60 80]
[ 0 30 60 90 120]
[ 0 40 80 120 160]]
vektor_red = np.arange(5).reshape(5, 1)
vektor_stupac = np.arange(5).reshape(1, 5)
print(vektor_red)
print(vektor_stupac)[[0]
[1]
[2]
[3]
[4]]
[[0 1 2 3 4]]
print(np.dot(vektor_stupac, vektor_red))[[30]]
print(np.dot(vektor_red, vektor_stupac))[[ 0 0 0 0 0]
[ 0 1 2 3 4]
[ 0 2 4 6 8]
[ 0 3 6 9 12]
[ 0 4 8 12 16]]