Obrázky, grafy

import matplotlib.pyplot as plt
import numpy as np
import pandas as pd

x = np.linspace(-2,2,100)
y = x**2
z = x**3

plt.plot(x,y)
plt.plot(x,z)

[<matplotlib.lines.Line2D at 0x7f6c0589f200>]

../_images/d4474dfd1eef10910722b1e9af7d6875eb508cf8b59b1c90822089e9bfcc773e.png

fig, ax = plt.subplots(1, figsize = (10,4))
ax.plot(x,y)
ax.plot(x,z)
ax.set(
    title="Nadpis",
    xlabel="Popisek na ose x",
    ylabel="Popisek na ose y",
    xlim = (-1,None),
    ylim = (-2,4)
)

[Text(0.5, 1.0, 'Nadpis'),
 Text(0.5, 0, 'Popisek na ose x'),
 Text(0, 0.5, 'Popisek na ose y'),
 (-1.0, 2.2),
 (-2.0, 4.0)]

../_images/8e62706ad29f4176ee36bc8ba7753ef7012abd81a1996732b7dbdddb4d3a246c.png

plt.plot(x,y,label="parabola")
plt.plot(x,z,label="kubická parabola")
plt.legend()
plt.grid()

../_images/9e6867d4022e8b94551ef28aab4a9a7af1d8213749f8ce7b3bda993e37c08c1a.png

fig,ax = plt.subplots(2,1,sharex=True)
ax[0].plot(x,y,label="parabola")
ax[1].plot(x,z,label="kubická parabola")
for i,j in zip(ax,["kvadratické","kubické"]):
    i.legend()
    i.set(title="Graf "+j+" funkce")

../_images/4e217e82494f7efe28219203edc2f21cbf58ecfc647217f27b94b6c9bf81be3d.png

fig,ax = plt.subplots(3,1,sharex=True)
for i,k in enumerate([2,4,8]):
    ax[i].plot(x,np.sin(k*x),color=f"C{i}",label=rf"$\sin({k}x)$")

plt.suptitle("Grafy některých goniometrických funkcí")    
ax[2].set(xlabel="úhel (rad)")
fig.legend()

<matplotlib.legend.Legend at 0x7f6c0580b6b0>

../_images/6ce6c03c33a20c4ca82b69276d333a8c2f88fa3f8d9cd613b38d540e53f802a3.png

pocet = 100
x = np.random.random(pocet)
sum = np.random.random(pocet)
y = np.exp(3*x)*(1+0.4*sum)
fig, ax = plt.subplots(1)
plt.plot(x,y,".")
#ax.set(yscale="log")

[<matplotlib.lines.Line2D at 0x7f6bfd6b1970>]

../_images/56371bb3070090f0a459ef46c8e005f93a8c2a05b7f7ba60962c68fbf55ad143.png

x = np.linspace(0,1,100)
y = x**2
fig,ax = plt.subplots(1)
ax.plot(x,y)
# ax.set(
#     xlim=(None,None),
#     ylim=(-1,None),
#     title="Můj graf",
#     xlabel="osa x",
#     ylabel="osa y",
# )
# plt.grid()

[<matplotlib.lines.Line2D at 0x7f6bfd5cba70>]

../_images/8ba478a3f5e97d961878cc50d93f38eb431dc15176b4e7fb270a7df3c951482e.png

x = np.linspace(0,1,100)
df = pd.DataFrame(index=x)
df["y1"] = x**2
df["y2"] = x**2+.5
fig,ax = plt.subplots(1)
df.plot(ax=ax)
# ax.set(
#     xlim=(None,None),
#     ylim=(-1,None),
#     title="Můj graf",
#     xlabel="osa x",
#     ylabel="osa y",
# )
# plt.grid()

<Axes: >

../_images/227b9a422fd02b4ae12fa527a4ddb9201190a715b7435a64b01be097f40fda4f.png

Obrázky, grafy#