Category "math"

Moving window size for time series analysis : Minimum description length and Fractal data dimension

I'm doing the time-series analysis as a hobby and am attempting to discover the optimal window size. After some study, I found 2 techniques that had been mentio

How is math.copysign(x, y) in Python useful?

I was going over the functions of the math module in Python and found the math.copysign (x,y) function. I want to know when someone would use this function. I

WPF Canvas: Rotate a grouped shape

In my WPF application, I am trying to rotate a set of grouped shapes inside a canvas. I am getting grouped shape object TOP/LEFT position using the formulae men

WPF Canvas: Rotate a grouped shape

In my WPF application, I am trying to rotate a set of grouped shapes inside a canvas. I am getting grouped shape object TOP/LEFT position using the formulae men

Classifying cubic bezier curves according to Loop & Blinn 2005

I am trying flatten a bezier path (remove all intersections and replace with end points) as part of the implementation of the rendering algori

Convert 8 points to a rectangle

I draw 4 lines through 8 points on my picturebox which creates a rectangle. float xnum = 0.580481F; float ynum = 0.373782F;

Minimum moves to transform a list so that each element equals its own frequency

Given a sorted array like [1,2,4,4,4]. Each element in the array should occur exactly same number of times as element. For Example 1 should occur 1 time, 2 shou

Python Cartesian plane plot and line

I want to create a cartesian plane in python that looks similar to the attached image, where I have 2 sets of coordinates e.g. (7,7) (17.4,20), and a line going

How can I calculate the tens place value of 2^100 in C++?

How can I calculate the tens place value of 2^100 in C++? I tried this; #include <cmath> #include <iostream> using namespace std; int main(){

Convert Calendar Days to Working Days (and Vice Versa) | 4 Day Work Week

I have values corresponding to 'Calendar Days.' I'd like to convert this to 'Working Days.' In this example, a 'Working Day' is defined by Monday through Thurs

Calculate spin frequency from rotation change in degrees

I have an object that rotates in the same direction at a variable speed. I have the ability to measure the angle of this object in degrees (0-360) every frame (

center of mass in each cell of N-dimensional rectilinear grid

I have an n-Dimensional rectilinear grid, such that the edges in each dimension i are given by x_i = {x[i, 0], x[i,1], ..., x[i, Ni-1], x[i, Ni]}, with N_i edge

Plot Cassini ovals in Python using numpy and matplotlib

I am trying to plot Cassini ovals in Python using these parametric equations for x,y. https://mathcurve.com/courbes2d.gb/cassini/cassini.shtml Here is my progra

PCA on sklearn - how to interpret pca.components_

I ran PCA on a data frame with 10 features using this simple code: pca = PCA() fit = pca.fit(dfPca) The result of pca.explained_variance_ratio_ shows: array

How do I fill Matrix4 with translation, skew and scale values in flutter?

Suppose, I have these values for a container of height 200 and width 300: scaleX = 0.9198 scaleY = 0.9198 skewX = -0.3923 skewY = 0.3923 translateX = 150 transl

How to put mathematical equations in source code without making it unreadable?

When implementing complex calculations, I found that readability suffered a lot. For example, this formula is absolutely unreadable when translated to code (I c

Scaling the X axis of a rotated ellipse

I have a scatter plot and I'm allowing points to be selected by drawing an ellipse like so: In the above image the X axis and Y axis are scaled differently. I'

Scale current item to 1

I wonder how to scale the current index from 1 to 0.8 when swiping to the next item. I've been building a carousel on how to make the centered item from 1 to 0.

What's the time complexity of prod() in math in Python

Summary) What's the time complexity of math.prod() How to improve this code to get to the pass Details) Currently working on 'Product of Array Except Self' on L

Translating Screen Coordinates [ x, y ] to Camera Pan and Tilt angles

I have a IP Camera which can PTZ. I am currently streaming live feed into the browser and want to allow user to click a point on the screen and the camera will