Recent questions tagged Math

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math - Project Euler #10 Java solution not working

I'm trying to find the sum of the prime numbers < 2,000,000. This is my solution in Java but I can't seem get ... new Helper(); p.run(); } } 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 - Similarity Between Colors

I'm writing a program that works with images and at some point I need to posterize the image. This means I ... most accurate to the human eye. 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 - x86-64 Big Integer Representation?

How do hig-performance native big-integer libraries on x86-64 represent a big integer in memory? (or does it ... Internals.html Whats a limb?) 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 2^n modulo 1000000007 , n = 10^9

what is the fastest method to calculate this, i saw some people using matrices and when i searched on ... which require computing large values 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 - Transform 2d spline function f(t) into f(x)

So I've got a special case set of cubic splines, whose 2d control points will always result in a curve ... good enough to draw is sufficient. 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 do I round a number in JSTL?

I'm doing a division in a JSP and I'd like to round the result - how should I do this? i.e. <c:set var ... ...how do I round the result? 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 - Java algorithm for normalizing audio

I'm trying to normalize an audio file of speech. Specifically, where an audio file contains peaks in volume, I'm ... in the demo code doesn't? 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 there a way to find the approximate value of the nth prime?

Is there a function which will return the approximate value of the n th prime? I think this would be something like ... the n th prime number.) 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 total number of nodes in a full k-ary tree, in terms of the number of leaves?

I am doing a unique form of Huffman encoding, and am constructing a k-ary (in this particular case, 3-ary) tree ... the case of a k-ary tree. 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 - Gravity Compensation in Accelerometer Data

Given an Accelerometer with 9 DOF (Accelerometer, Gyroscope and Magnetometer) I want to remove/compensate the ... this given above information? 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 get Yaw, Pitch and Roll from a 3D vector

I have a direction vector that applied to a position gives me the point at which the camera should look ... properly? Thanks in advance 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 do I initialize the t-variables in "A Fast Voxel Traversal Algorithm for Ray Tracing"?

I am trying to implement the algorithm explained on this paper, used to traverse grid cells in order ... /pseudocode expression for me? 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 - Difference between the two quaternions

Solved I'm making a 3D portal system in my engine (like Portal game). Each of the portals has its own ... I have tested it with GLM library 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 create a large (High Quality 300dpi) image from JSON / array of Data (width,height,x,y,angels) using PHP ImageMagic / Imagick

I created a design (270x470) with some pictures and text on Canvas using FabricJs then i export all pictures ... are useful for everyone. 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 - mathematica envelope detection data smoothing

The following Mathematica code generates a highly oscillatory plot. I want to plot only the lower envelope of the plot ... 15], Axes -> False] 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 - Kinect intrinsic parameters from field of view

Microsoft state that the field of view angles for the Kinect are 43 degrees vertical and 57 horizontal (stated ... the field of view? 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 - Why should I use t1 - t0 < 0, not t1 < t0, when using System.nanoTime() in Java

When I was reading System.nanoTime() API in Java. I found this line: one should use t1 - t0 < 0 ... ? These two things make contradiction. 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 - Approximate e^x

I'd like to approximate the ex function. Is it possible to do so using multiple splines type based approach? i.e ... , in fact size is critical. 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 - Sample uniformly at random from an n-dimensional unit simplex

Sampling uniformly at random from an n-dimensional unit simplex is the fancy way to say that you want ... distribution java random percentages 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 - Non-linear regression in C#

I'm looking for a way to produce a non-linear (preferably quadratic) curve, based on a 2D data set, for ... the coefficients for such a curve? 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 difference between tf.truncated_normal and tf.random_normal?

tf.random_normal(shape, mean=0.0, stddev=1.0, dtype=tf.float32, seed=None, name=None) outputs random values ... . But didn't understand much. 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 so special about Monads?

A monad is a mathematical structure which is heavily used in (pure) functional programming, basically Haskell. However, ... would work 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 - Algorithm to find two points furthest away from each other

Im looking for an algorithm to be used in a racing game Im making. The map/level/track is randomly generated ... floodfill, but thats 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 - What is the difference between equality and equivalence?

I've read a few instances in reading mathematics and computer science that use the equivalence symbol ≡, ( ... between these two concepts? 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 - Line Equation with angle

How can I find equation of a line or draw a line, given a starting point, length of line and angle of line (relative to x-axis)? 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 does one convert world coordinates to camera coordinates?

I have an input 3D vector, along with the pitch and yaw of the camera. Can anyone describe or ... required transformation and matrix mapping? 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 - Discretized continuous Fourier transform with numpy

Consider a function f(t), how do I compute the continuous Fouriertransform g(w) and plot it (using numpy ... solution to the Fourier Integral. 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: Finding a trend in a set of numbers

I have a list of numbers in Python, like this: x = [12, 34, 29, 38, 34, 51, 29, 34, 47, 34, 55, ... What's the best way to get this in Python? See Question&Answers more detail:os...

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

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