Derivatives, Symbolic and Numeric in Python

[MuhammadAkbar-ijlm]

your explanation with python. makes math become fun and easily to understand to people who like programming. :d

[tomjerry]

Why you have taken 2.0?
Can i take any number instead of 2.0 in this derivative?

[alice-gvue]

Thanks, that is what I was looking for, especially how to plot the derivative!

[noedelacruz]

Great explanation, this video really helped me.

[billh]

Ok but can you make it from scratch instead of a library import that does it for you? Really would love to see how to actually do it.

[alexanderminakov]

After you got the symbolyic derivative (analytic, exact), how can you evaluate it at a numeric point, say at 2.0? That is, how do you transform it from sympy.core.numbers.One back to usual numbers?

[viveksingal]

Thanks. Very helpful. May I ask how we can effectively arrive at critical numbers of a derivative function using python?

[Mbear]

How would you calculate the second derivative numerically?

[tute]

thanks a lot for the video!! it was really easy to follow

[hansmuller]

what to do if i need derivate of a function that contains a imported function from openCV?

[theamazingagares]

i have a probleme with the script i got this error : module script is not callable for the line with x= sp. symbol('x')
i don't get the probleme some body can help plz ?

[makisJacob]

I am using Python 3 and Pycharm. I faced an error when I tried y=np.linspace(-3, 3)
plt.plot(y, f(y), label='Function') so I changed it into x=np.linspace(-3, 3)
plt.plot(x, f(x), label='Function') and it worked! I don't understand how did you overcome this error since y and f(y) weren't declared before in your code ...

[michaliskoumpanakis]

I have a function that has 3 variables and when I calculate let's say derivative(f, x) the result is a function F(x, yz).So I need to put x, y, z as input to show something numerical and not only x.I am talking about partial derivatives.How can I define it and print it?Thank you

[mitchellfolbe]

for pycharm last line needs added 'plt.show()' for graph to appear

[jackelinehernandez]

Please help!! I alredy use your code, and it was all fine util "plt.plot(y, f(y)) give an error... i dont know how to solve it!!!

[shankarfierce]

This is really helpful ! Could you please explain on how i could parse the equation of something like 3-5 ln t to differentiate.

[yehjiannrong]

Please Help me, thanks
from sympy import Symbol, Derivative
import numpy as np
x=Symbol('x')
y=2*np.power(x, 4)-3*np.power(x, 2)+2*x-20
y2=y.diff(x)
print(y2.__class__)
#When x has a value of -1, what is the value of the derivative?
f=Derivative((y, x, -1)).doit()
print(f)

[frankelindddd]

What if there might be two turning points and I am not sure where they are close to?

[theamazingagares]

hi there i have another probleme
this method seems to not support the derivative of an exponential function how to proceed in that case cause i have this error" symbol object has no attribut exp"
thanks

[awwesomemoment]

How can i enter the equation but through input, rather than inserting it through the code?