import numpy as np
import matplotlib.pyplot as plt
x = np.linspace(1,1.50,10)
print(x.round(2))
y= np.arange(-10,10,1)
print(y)
a= 3
c=1
lin = 2*x
quad=3*x**2 +1*x
deriv = 2*x-5
l = '2x'
q=  ' x**2'
d=  ' 2x-5 '


#leg = [l,q,d]
#plt.plot(lin)
#plt.plot(quad)
#plt.plot(deriv)
#plt.legend(leg, loc='upper left')
#plt.show()

x=np.arange(-10,10,1)
a=3
c=1

eq = a*x**2 +c*x
deriv  = 2*a*x+c

plt.plot(eq)
plt.plot(deriv)
plt.show()


fig = plt.gcf()
fig.show()
fig.canvas.draw()
i=1
x=np.arange(-1,0.5,0.2)
a=0.5
c=0.1
for i in range(10):

    plt.cla()
    plt.clf()
    plt.plot(eq) # plot  equation
    plt.plot(deriv)
    # update canvas immediately
    plt.xlim([-20, 40])
    plt.ylim([-20, 100])
    fig.canvas.draw()
    plt.pause(0.5)
    x=np.arange(-10+i,10+i,1)
    eq = a*x**2 +c*x
    deriv  = 2*a*x+c
    i+=1