Recent questions tagged math

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math - How would you program Pascal's triangle in R?

I am reading, on my own (not for HW) about programming, and one exercise involved programming Pascal's triangle ... this. Any hints? thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - What is the Mathematical formula for CUMIPMT function of EXCEL(how it is calculated)?

What is the Mathematical formula for CUMIPMT function of EXCEL(how it is calculated)? I want to calculate it mathematically. Please Help See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Can i calculate exp(1+2j) in python?

Can i calculate exp(1+2j) in python? exp(1+2j) Traceback (most recent call last): File "<stdin>", ... TypeError: can't convert complex to float See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - What is the result of casting float +INF, -INF, and NAN to integer in C?

Does any standard specifies what should be the output? For example this code: #include <stdio.h> #include <math.h> int ... (int)+inf < 0 !?! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Check to see if box fits in another box

Given LxWxH of a box A, and LxWxH of a box B, how can I do a simple check to see if A fits ... checking all the possible permutations. Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Is angle in between two angles

I have 3 angles a b c a=315 b=20 c=45 ok so would like to know giving all three if b is in ... self clear my first language is not English See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - C# double addition - strange behaviour

public static void Main() { Dictionary<string, double> values = new Dictionary<string, double>(); values.Add("a" ... know what is going on here? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Cubic Regression (best fit line) in JavaScript

I'm having the worst time trying to find a JavaScript code that could allow me to do cubic regressions. Would ... for any guidance. Best, Tom See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Given XOR & SUM of two numbers. How to find the numbers?

Given XOR & SUM of two numbers. How to find the numbers? For example, x = a+b, y = a^b; if x,y are given, ... b? And if can't, give the reason. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - How can I get view direction from the OpenGL ModelView Matrix?

I am writing a volume render program that constantly adjusts some plane geometry so it always faces the camera. ... possible and how it works? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - JAVA - exponential distribution

I need to find formula for exponential distribution of probability, but i don′t know how to find it :( This ... log(rand.nextDouble()); } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - How to Calculate Centroid in python

I'm beginner to python coding. I'm working over structural coordinates. I have pdb structure which have xyz coordinate ... point how?????? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Matlab formula optimization: Radial Basis Function

z - matrix of doubles, size Nx2; x - matrix of doubles, size Nx2; sup = x(i, :); phi(1, i) = {@(z) ... times, and it takes a lot of time... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - javascript - ceiling of a dollar amount

So I am adding and subtracting floats in javascript, and I need to know how to always take the ceiling of any number ... 3.20 3.00000001 = 3.01 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Inverse of Tan in python (tan-1)

I am trying to calculate the inverse of tan in python, but it does not give me the correct value, for example, ... the correct way to do than? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Get the maximum permutation matrix from logical matrix

A (m rows, n columns) is a (0,1)-Matrix (or logical matrix). How to get a sub matrix B (p rows, ... each row and each column and 0s elsewhere. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Find corners of a rotated rectangle given its center point and rotation

Can someone give me an algorithm that finds the position of all four corners of a rectangle if I know its ... the sides of the rectangle. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Negative & Positive Percentage Calculation

Let's say i have 3 sets of numbers and i want the % of their difference. 30 - 60 94 - 67 10 - 14 I ... just guessing ) 10 - 14 : +40% Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - How can I perform 64-bit division with a 32-bit divide instruction?

This is (AFAIK) a specific question within this general topic. Here's the situation: I have an embedded ... library documentation, of course). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Java: How do I perform integer division that rounds towards -Infinity rather than 0?

(note: not the same as this other question since the OP never explicitly specified rounding towards 0 or - ... int and long arithmetic.) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Base conversion of arbitrary sized numbers (PHP)

I have a long "binary string" like the output of PHPs pack function. How can I convert this value to ... a matching "pack base62" function. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - 3D Vector defined by 2 angles

So basically I'm looking for a way to calculate the x, y and z component of a vector using 2 angles as ... zero. All help would be appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Arithmetic in ruby

Why this code 7.30 - 7.20 in ruby returns 0.0999999999999996, not 0.10? But if i'll write 7.30 - 7.16, ... the problem, and how can i solve it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - perspective correction of texture coordinates in 3d

I'm writing a software renderer which is currently working well, but I'm trying to get perspective correction of ... normals etc.) as well? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - How to multiply/divide/add/subtract numbers of different types?

I'm working through the second edition of the Rust handbook, and decided to try and make the classic Celsius-to- ... type, as I did here? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Floating point exponentiation without power-function

Currently I have to work in an environment where the power-operator is bugged. Can anyone think of a method ... a power function or operator? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Open source C++ library for vector mathematics

I would need some basic vector mathematics constructs in an application. Dot product, cross product. Finding the ... own. I like that. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Separating Axis Theorem and Python

This is what I am currently doing: Creating 4 axis that are perpendicular to 4 edges of 2 rectangles. Since they ... works please let me know. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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