How can I convert radians to degrees with Python?
In the math module, I could only find math.cos(x), with cos/sin/tan/acos/asin/atan. This returns the answer in radians. How can I get the answer in degrees?
math
How did Python implement the built-in function pow()?
I have to write a program to calculate a**b % c where b and c are both very large numbers. If I just use a**b % c, it’s really slow. Then I found that the built-in function pow() can do this really fast by calling pow(a, b, c).
I’m curious to know how does Python implement this? Or where could I find the source code file that implement this function?
C and Python – different behaviour of the modulo (%) operation
I have found that the same mod operation produces different results depending on what language is being used.
Algorithm to find which number in a list sum up to a certain number
I have a list of numbers. I also have a certain sum. The sum is made from a few numbers from my list (I may/may not know how many numbers it’s made from). Is there a fast algorithm to get a list of possible numbers? Written in Python would be great, but pseudo-code’s good too. (I can’t yet read anything other than Python 😛 )
How do I compute derivative using Numpy?
How do I calculate the derivative of a function, for example
How can you determine a point is between two other points on a line segment?
Let’s say you have a two dimensional plane with 2 points (called a and b) on it represented by an x integer and a y integer for each point.
How to make scipy.interpolate give an extrapolated result beyond the input range?
I’m trying to port a program which uses a hand-rolled interpolator (developed by a mathematician colleage) over to use the interpolators provided by scipy. I’d like to use or wrap the scipy interpolator so that it has as close as possible behavior to the old interpolator.
Why do “Not a Number” values equal True when cast as boolean in Python/Numpy?
When casting a NumPy Not-a-Number value as a boolean, it becomes True, e.g. as follows.
Round float to x decimals?
Is there a way to round a python float to x decimals? For example:
Python and Powers Math
I’ve been learning Python but I’m a little confused. Online instructors tell me to use the operator ** as opposed to ^ when I’m trying to raise to a certain number. Example: