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Questions tagged [equations]

194 questions
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display math on nbviewer?

I write an ipython notebook which correctly display the equations on my local machine. However, when I paste the ipynb file to Gist and use the nbviewer to view it, some math equation disappear. What causes the problem? Any way to fix it? The ipynb…
sgu
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Trying to solve over 1000 different equations as fast as possible

I have a chunk of code which uses symbolic variables to solve various different equations. Currently I'm using a loop from say 1: 1000+, so that at each point it selects the right equation (depending on various if statements), and with the right…
user2983967
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How to solve a combined set of linear equations and inequalities in Matlab?

I have a problem that involves a system of linear equations and inequalities. The problem is defined by Ax = 0 and Cx > 0 (A and C are matrices, x is a vector of variables to be solved for). This problem likely has a range of solutions. I'd like to…
Moot
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Write mathematical equation in flash

I am working on a math quiz using flash CS3 with ActionScript 3.0 I have the source document in Microsoft Word. They have all been typed in equation nicely. I cannot copy them straight into flash document. I do not want to printscreen those…
Juniki Takuya
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I am using Ipython and sympy to solve a system of equations

I am trying to solve a system of equations and then have the results stored in variables variables for plotting or further calculation. %pylab inline from sympy import init_printing;init_printing() from sympy import…
user2610827
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How can I plot 3 equations with 3 variables in MATLAB?

I am trying to plot this system: x1 - x2 + 3x3 = 8 2x1 - x2 + 4x3 = 11 - x1 + 2x2 -4x3 = -11 I tried with ezsurf and meshgrid, but I wasn't able to do it. clc clear all close all A = [1 -1 3; 2 -1 4; -1 2 -4]; B = [8 11 -11]'; C = [A…
Mattia Manzo Manzati
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I can't understand the mathematical equations of Easing function

I'm learning Easingfunction's application in XNA. But I can't understand the mathematical equations of it. For Example, the formula used for BackEase: f(t) = t^3 - a * t * sin (t * pi) SinEase: f(t) = 1 - [Sin (1 - t) * (pi / 2)] and BounceEase,…
user2360585
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A system or language to reverse equations?

Lets say I have a simple equation as follows: x = 50 * (20 * item) Is there a system or language to reverse this automatically? So lets say I have x as an input and want to find out which item it is. item = (x - 50) / 20 A very trivial and…
Robin Rodricks
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Solving two algebraic equations in java

I have two equations that need to be evaluated in java y=(x+1)*2-3 y=5 These equations are dynamic in nature y= x*8x6-5*5 y= 3 y is known in these equations, I need to determine the value of x What is the best and easy way to write a program in…
user1130906
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find the position of a point inside a triangle to have specific area for each part (2D)

Consider an in-plane Triangle (Black) with 3 edge points, (1,2,3). The area of this triangle is considered to be A. Then for an arbitrary point inside the triangle and connecting this point to each edges, we will have 3 small triangles, (Areas A12…
NKN
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Software where equations are the principal objects of interest?

I'm working on a program where the main entities are mathematical equations. Equations can only return a double or a boolean result. The problems: 1- Lots of equations. (~300 per file) 2- There has to be a computations-log at the end, so every…
Mohamed Tarek
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Sudoku solving solution for only row and columns

If have 9 lines that are 9 line just like sudoku, but they are instead like 530070000 600195000 098000060 800060003 400803001 700020006 060000280 000419005 000080079 Which transforms into…
keyerer
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Try solver System of linear algebraic equations in Shell Bash

I want to try solving system of linear algebraic equations using the bash shell but have had problems. The input value is a matrix, however I dont know how to input matrix in bash because that is doesn't support 2-dimensional arrays. Thank you so…
denmodo
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C#: How to create and use a database of equations?

I've been trying to create a database of equations that my windows form application will supply variables to and then calculate the solution. I was trying to store my equations in a text file and load them into a list but I haven't been able to…
matt pruent
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MATLAB Code for solving desired 'n' number of simultaneous equations of the type Ax = b

Problem in MATLAB Code for solving desired 'n' number of simultaneous equations of the type Ax = b provided that the solving involves the method of upper triangular matrix and the values of A and b are evolved into Aprime and bprime along with the x…
Hariharasubbu Balamoorthy
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