import matplotlib.pyplot as plt
import numpy as np
from mpl_toolkits import mplot3d
from matplotlib.ticker import LinearLocator, FormatStrFormatter
def f(x, y):
    return (x**3+x**2+y**2++2*x*y+-10*x+2*y)

x = np.linspace(-6, 6, 20)
y = np.linspace(-6, 6, 20)
X, Y = np.meshgrid(x, y)
Z = f(X, Y)




fig = plt.figure()
ax = plt.axes(projection='3d')
ax.set_title('Grafiko pavadinimas');
ax.set_xlabel('x asis')
ax.set_ylabel('y asis')
ax.set_zlabel('z asis');


ax.view_init(10, 70)
plotas = ax.plot_surface(X, Y, Z,  cmap="magma")
fig.colorbar(plotas, shrink=0.5, aspect=20) #color bar properties


ticks = np.linspace(-6,6,26)
ticks2=np.linspace(-150, 300, 26)
ax.set_yticks(ticks)
ax.set_xticks(ticks)
ax.set_zticks(ticks2)
xlabels=[""]*26
xlabels[25]=10
xlabels[12]=0
xlabels[0]=-10
ylabels=[""]*26
ylabels[25]=10
ylabels[12]=0
ylabels[0]=-10
zlabels=[""]*26
zlabels[0]=-100
zlabels[6]=-50
zlabels[25]=250
zlabels[12]=0
zlabels[18]=100
ax.set_zticklabels(zlabels)
ax.set_xticklabels(xlabels)
ax.set_yticklabels(ylabels)
plt.show()