Recent questions tagged Math

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math - Explain - Formula to curve through a control point

I have a question regarding formula curving through a control point. As you know, HTML Canvas has quadraticCurveTo( ... derived? Thanks, Venn. 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 the double asterisk ** a valid JavaScript operator?

I solved a kata on CodeWars and was looking through some of the other solutions when I came across the double ... have found nothing about 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 - How to check for division by 7 for big number in C++?

I have to check, if given number is divisible by 7, which is usualy done just by doing something like n ... done using only standard libraries. 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 convert a 3x3 rotation matrix into 4x4 matrix?

I'm currently using a 3x3 rotation matrix to work with 3D points. How does this matrix differ from a 4x4 Matrix? ... a 3x3 matrix into a 4x4? 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 determine if a point is within a quadrilateral

Goal I want to determine if a test point is within a defined quadrilateral. I'm probably going to implement the ... 4, 4 connects to 1) 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 - Python prime generator in one-line

I'm trying to create prime number generator in one-line of Python just as a fun exercise. The following code works as ... I haven't got a clue. 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 - WAV File Synthesis From Scratch - C

Recently I saw a video lecture in my CS 101 class that inspired me to start playing with the WAV File Format in C. ... %s ", output); return; } 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 - Addition and multiplication in a Galois Field

I am attempting to generate QR codes on an extremely limited embedded platform. Everything in the specification ... operation in this circuit. 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 - For RSA, how do i calculate the secret exponent?

For RSA, how do i calculate the secret exponent? Given p and q the two primes, and phi=(p-1)(q-1) ... equation. Can someone help please, cheers 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 fastest algorithm for division of crazy large integers?

I need to divide numbers represented as digits in byte arrays with non standard amount of bytes. It maybe ... any conversions to numbers. 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 probability of guessing (matching) a Guid?

Just curious but what is the probability of matching a Guid? Say a Guid from SQL server: 5AC7E650-CFC3-4534-803C- ... = (1152)! discuss =D 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 does the [0]*x syntax do in Python?

A flash question, I'm looking at the following code from __future__ import division import math import time def dft ... the double asterisk ** ? 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 - Interfacing octave with C#

I have developed a program in Octave to which I would like to add a GUI layer. I want to create an ... C# linear algebra library, perhaps? 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 - Why does Gnu Octave have negative zeroes?

This is an odd one I'm puzzled about. I recently noticed at the Gnu Octave prompt, it's possible to ... not displayed in the default output. See Question&Answers more detail:os...

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

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1.1k views

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math - Why does C++ mandate that complex only be instantiated for float, double, or long double?

According to the C++ ISO spec, §26.2/2: The effect of instantiating the template complex for any ... higher-precision real numbers, etc. 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 - Moving an Image in circular motion based on touch events in android

I am trying to move an ImageView (not rotate). The movement is supposed to be on the edge of a circle. This ... true; break; } return true; } 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 - Catmull-Rom splines in python

Is there a library or function in python to compute Catmull-Rom spline from three points ? What I need in the end ... testing (or to save 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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1.2k views

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math - Converting a decimal to a mixed-radix (base) number

How do you convert a decimal number to mixed radix notation? I guess that given an input of an array of each ... of the values of each column. See Question&Answers more detail:os...

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

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1.2k views

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math - Moving a Point Along a Line in JavaScript Canvas

Let's say that I have the coordinates of a line (25,35 45,65, 30,85 - It would be a two part line). ... distance every frame. How can I do this? See Question&Answers more detail:os...

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

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983 views

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math - One-to-one integer mapping function

We are using MySQL and developing an application where we'd like the ID sequence not to be publicly visible.. ... : http://pastebin.com/np28xhQF See Question&Answers more detail:os...

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

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1.0k views

1 answer

math - How can I make a "working" repeating decimal representation of a rational number?

I've figured out how to display the repeating part of a repeating decimal using OverBar. repeatingDecimal doesn't actually ... in Cases 3 and 4? See Question&Answers more detail:os...

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

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1.0k views

1 answer

math - Simple way to interpolate between points in 3D space to form a smooth surface

I'm trying to come up with a simple and efficient way to create a smooth surface which intersects a number of given ... a simple way to do this? See Question&Answers more detail:os...

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

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1.2k views

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math - Extracting View Frustum Planes (Gribb & Hartmann method)

I have been grappling with the Gribb/Hartmann method of extracting the Frustum planes for some time now, with little ... not in world-space... See Question&Answers more detail:os...

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

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975 views

1 answer

math - One-to-one integer mapping function

We are using MySQL and developing an application where we'd like the ID sequence not to be publicly visible.. ... : http://pastebin.com/np28xhQF See Question&Answers more detail:os...

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

0 votes

1.0k views

1 answer

math - How can I make a "working" repeating decimal representation of a rational number?

I've figured out how to display the repeating part of a repeating decimal using OverBar. repeatingDecimal doesn't actually ... in Cases 3 and 4? See Question&Answers more detail:os...

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

0 votes

1.0k views

1 answer

math - Simple way to interpolate between points in 3D space to form a smooth surface

I'm trying to come up with a simple and efficient way to create a smooth surface which intersects a number of given ... a simple way to do this? See Question&Answers more detail:os...

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

0 votes

1.1k views

1 answer

math - Extracting View Frustum Planes (Gribb & Hartmann method)

I have been grappling with the Gribb/Hartmann method of extracting the Frustum planes for some time now, with little ... not in world-space... See Question&Answers more detail:os...

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

0 votes

1.1k views

1 answer

math - Moving a Point Along a Line in JavaScript Canvas

Let's say that I have the coordinates of a line (25,35 45,65, 30,85 - It would be a two part line). ... distance every frame. How can I do this? See Question&Answers more detail:os...

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

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