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How do I compute derivative using Numpy?
...d choice.
Here is an example using SymPy
In [1]: from sympy import *
In [2]: import numpy as np
In [3]: x = Symbol('x')
In [4]: y = x**2 + 1
In [5]: yprime = y.diff(x)
In [6]: yprime
Out[6]: 2⋅x
In [7]: f = lambdify(x, yprime, 'numpy')
In [8]: f(np.ones(5))
Out[8]: [ 2. 2. 2. 2. 2.]
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How can I plot with 2 different y-axes?
...that each set of points has its own (different) y-axis (i.e., in positions 2 and 4 on the figure) but the points appear superimposed on the same figure.
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~x + ~y == ~(x + y) is always false?
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237
Assume for the sake of contradiction that there exists some x and some y (mod 2n) such that
~...
How to avoid overflow in expr. A * B - C * D
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120
This seems too trivial I guess.
But A*B is the one that could overflow.
You could do the follo...
How to join two sets in one line without using “|”
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320
You can use union method for sets: set.union(other_set)
Note that it returns a new set i.e it ...
Version of Apache installed on a Debian machine
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Try apachectl -V:
$ apachectl -V
Server version: Apache/2.2.9 (Unix)
Server built: Sep 18 2008 21:54:05
Server's Module Magic Number: 20051115:15
Server loaded: APR 1.2.7, APR-Util 1.2.7
Compiled using: APR 1.2.7, APR-Util 1.2.7
... etc ...
If it does not work for you, run th...
How do you connect localhost in the Android emulator? [duplicate]
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Use 10.0.2.2 to access your actual machine.
As you've learned, when you use the emulator, localhost (127.0.0.1) refers to the device's own loopback service, not the one on your machine as you may expect.
You can use 10.0.2.2 to acce...
Difference between break and continue statement
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21 Answers
21
Active
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List comprehension: Returning two (or more) items for each item
Is it possible to return 2 (or more) items for each item in a list comprehension?
6 Answers
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