Yes, it can be annoying that diff repr's to D. Sometimes, I do D =
diff to make expressions copy and paste correctly.
Aaron Meurer
Sent from my iPod touch.
On Jan 12, 2010, at 8:55 PM, smichr <smi...@gmail.com> wrote:
I suceeded to run the code.
f = Function('f')
x = Symbol('x')
diff(f(x),x)
D(f(x), x)
How about second derivatives ?
I mean
diff(D(f(x), x),x)
Is there any way to get the answer ?
If you replace the "D" with "diff" in your example it would work:
D(f(x),x)
Traceback (most recent call last):
File "<interactive input>", line 1, in <module>
NameError: name 'D' is not defined
D=diff
D(f(x),x)
D(f(x), x)
Either of these work, too:
from sympy import *
f=Function('f')
x=Symbol('x')
diff(f(x),x,2) # list the number of times that you want to
differentiate wrt x after the x
D(f(x), x, x)
diff(f(x),x,x) # or just list the x that many times
D(f(x), x, x)
/c
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