Recent questions tagged math

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math - Check which side of a plane points are on

I'm trying to take an array of 3D points and a plane and divide the points up into 2 arrays based on which ... this sound like it would work? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - How to convert direction vector to euler angles?

I'm looking for a way to convert direction vector (X,Y,Z) into Euler angles (heading, pitch, bank). I ... do I convert that into Euler angles? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - A simple algorithm for generating positive-semidefinite matrices

I want to generate positive random semi-definite matrices. I am looking for an algorithm or more preferably an ... , java or any language. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - What are arithmetic underflow and overflow in C?

What do arithmetic underflow and overflow mean in C programming? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Affine transformation algorithm

Does anyone know of any standard algorithms to determine an affine transformation matrix based upon a set of known ... two co-ordinate systems? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - C# find the greatest common divisor

"The greatest common divisor of two integers is the largest integer that evenly divides each of the two numbers. Write ... return m; } } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Mathematical function differentiation with C#?

I see that I can declare a function with (say) public double Function(double parameter) but what if I do ... the derivative of that function? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - What is the difference between 'precision' and 'accuracy'?

What is the difference between 'accurate' and 'precise' ? If there is a difference, can you give an ... both accurate and precise Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Conversion between RGB and RYB color spaces

I am currently trying to convert colours between RGB (red, green, blue) colour space and RYB (red, yellow, blue ... about this in the right way? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Outline of cubic bezier curve stroke

By stroke of the cubic bezier curve I mean rendering a curve 'A' with a specific line width 'w'. How can I ... of the stroke of bezier 'A' ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Generating sorted random ints without the sort? O(n)

Just been looking at a code golf question about generating a sorted list of 100 random integers. What ... uniform distribution of integers. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Transforming captured co-ordinates into screen co-ordinates

I think this is probably a simple maths question but I have no idea what's going on right now. I'm ... I even begin? Any help appreciated See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Optional args in MATLAB functions

How can I declare function in MATLAB with optional arguments? For example: function [a] = train(x, y, opt) ... opt must be an optional argument. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Mathematical equation manipulation in Python

I want to develop a GUI application which displays a given mathematical equation. When you click upon a particular ... one is my main problem. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Simple 3x3 matrix inverse code (C++)

What's the easiest way to compute a 3x3 matrix inverse? I'm just looking for a short code snippet that' ... not link in additional libraries. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Rotate point about another point in degrees python

If you had a point (in 2d), how could you rotate that point by degrees around the other point (the origin ... function rotates it by 10 degrees See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Why is the range of signed byte is from -128 to 127 (2's complement) and not from -127 to 127?

I read Why is the range of bytes -128 to 127 in Java? it says 128 is 10000000. Inverted, it's 01111111 ... instead of writing -128 as 10000000 ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Optimized TSP Algorithms

I am interested in ways to improve or come up with algorithms that are able to solve the Travelling salesman ... breaking a certain algorithm. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Calculating rectangle 3D coordinate with coordinate its shadow?

Sometimes was a problem what is the rectangle 3D rotated and be perspective transition (for example in CSS) draw ... draw as the tetragon. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - How to calculate the scale's result?

I am new to d3.js library, and I am trying to understand the concept of domain and ranges. I read Scott Murray' ... 't return 180. Any idea why? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - How to use % operator for float values in c

When I use % operator on float values I get error stating that "invalid operands to binary % (have float' ... such large integer values???? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - How to calculate with imaginary numbers in JavaScript?

Recently, I am trying to calculate using some equations that involve the imaginary number i in them. ... prototype.imaginary = imaginary; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Why 0 ** 0 equals 1 in python

Why does 0 ** 0 equal 1 in Python? Shouldn't it throw an exception, like 0 / 0 does? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Concise way to implement round() in C?

The embedded C I'm using doesn't have a round() function it it's math lib, what would be a concise ... 's something more clever. Thanks, Fred See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Associativity gives us parallelizability. But what does commutativity give?

Alexander Stepanov notes in one of his brilliant lectures at A9 (highly recommended, by the way) that the ... ? Out of order execution? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Is there a short-hand for nth root of x, in Python?

Simple syntax question. In maths if I have two number 3 and 2 and I wish to calculate 3 to the power of 2 ... I need to use the math module ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - how to plot ellipse given a general equation in R?

Ellipse general equation: a * x ^ 2 + b * y ^ 2 + c * x * y + d * x + e * y + f = 0 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - Quadratic equation in Ada

I just came around and decided to try some Ada. The downside is that the syntax and function strays quite away ... case, which is strange... See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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