scipys quadrature function complains about perfectly sane lambda? Question: I have 2 versions of a snippet one works one doesn’t, this works: f = lambda x : x * 2.0 * pi print(scipy.integrate.quadrature(f, 0.0, 1.0)) This fails: f = lambda x : math.exp(x * 2.0 * pi)` print(scipy.integrate.quadrature(f, 0.0, 1.0)) With error: TypeError: only size-1 …
Playful cat and keyboard Question: Problem: The keyboard on the screen of the mobile application consists of: 26 capital Latin letters, 10 digits 4 navigation keys: up, down, right and left. The application is open on a tablet, on which an unpredictable and consistent cat walks. The unpredictability of the cat is that all its …
How to find best fit line using PCA in Python? Question: I have this code that does it using SVD. But I want to know how to do the same using PCA. Online all I can find is that they are related, etc, but not sure how they are related and how they are different …
Sympy not simplifying polygamma Question: I have a python script that finds the derivative of a function, within which is the gamma function. When substituting values in, instead of finding the digamma of the values and returning it as a float, sympy only returns polygamma (0, 1.05) or whatever the output is. Below is my …
Python 3 matrix calculator Question: I have an issue with this code, It works wrong on option 7 at least is the main problem, It should do the matrix modify and save new value like 2A(A s 2) should be saved on A and maybe because it doesn’t update to new value it gives wrong …
bad operand type when using np.linalg.lstsq in python Question: I am trying to use np.linalg.lstsq to solve a problem, I started with simple arrays to solve the equation: CX = D where C = [[66.31835487 67.46962851 58.22702243] [67.46962851 68.65912117 59.24895075] [58.22702243 59.24895075 51.56007083]] D [0.01144368 0.01164468 0.01004645] ` I used: x = – np.linalg.lstsq(C, D, …
Split number into chunks according to rank Question: A very practical task. I have a number of items that need to be distributed into several stores, according to store rank. So the higher the rank, the more items store will get, so store with rank 1 will get most items and store with rank 100 …
How can I partition `itertools.combinations` such that I can process the results in parallel? Question: I have a massive quantity of combinations (86 choose 10, which yields 3.5 trillion results) and I have written an algorithm which is capable of processing 500,000 combinations per second. I would not like to wait 81 days to see …
Calculating probability distribution of an image? Question: I want to find the probability distribution of two images so I can calculate KL Divergence. I’m trying to figure out what probability distribution means in this sense. I’ve converted my images to grayscale, flattened them to a 1d array and plotted them as a histogram with bins …
How to create an Python function able to find the smallest multiple of 8 to handle batch jobs? Question: Lets say the function will receive an list of IDs like: ids = [15, 16, 17] In this scenario the desired OUTPUT should be: 24 Because the ranges will be: 1 to 24 25 to 48 …
