Questions tagged [equation-solving]
763 questions
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Calculation int to decimal fails
Im working on a method calculating conversion rate, problem is i devide Visitors with orders and get a result (whole numbers like 84) but when i divide the other way around i get 0.0.
If i devide orders with visits with a calculator the result…
WhoAmI
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Trilateration Math check
I'm trying to crate an indoor trilateration program working off of N BLE objects. Where I have any number of beacons in a room and my ipad can track its location within them to a sub meter degree of accuracy (I hope).
I asked this question on the…
N0xus
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maxima and converting output of variable to float
I can get maxima to solve an equation but can't figure out why it won't show it's numerical value without typing the extra command/step of float(%). Is there away to automatically convert a solved variable to a numerical format.
Example of…
Rick T
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where is cula "culaSgesv" answer for X?
I just downloaded Cula and I want to use it's implemented functions for solving system of linear equation I looked into Examples Directory and I saw below code but it's very confusing when they want to obtain X solution of A*X=B they just copy B in…
Alexander1991
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How to invert a matrix
I need to solve a system of n-linear equations with n-unknown variables in C++ using the gaussian method of elimnation. Any hints how to achieve that? I'll be probably using rand(); for the amount of n, since isn't available, because C++11 I can't…
user3182683
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how can I solve a redundant symbolic system in matlab?
let
n0 =
nx*cos(a) + nz*cos(b)*sin(a) + ny*sin(a)*sin(b)
ny*cos(b) - nz*sin(b)
nz*cos(a)*cos(b) - nx*sin(a) + ny*cos(a)*sin(b)
in a and b,with the ns fixed (but of course,not assigned) values.
if I…
user1834153
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From ODE45 take Angular acceleration MATLAB
I'm solving the eqaution motion and I need numerical integration, so I decided to use ode45 in Matlab. I found the displacement and the velocity, now I need to find the Angular acceleration and make plot with time.
There's my code and…
MrPitivier
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Mathematica, solving non linear system of equations with lot of equations and variables
I need to find a square matrix A satisfying the equation
A.L.A = -17/18A -2(A.L.L + L.A.L + (L.L).A) + 3(A.L + L.A) -4L.L.L + 8L.L - 44/9L + 8/9*(ID)
,where L is a diagonal matrix L = {{2/3,0,0,0},{0,5/12,0,0},{0,0,11/12,0},{0,0,0,2/3}}.
I can…
user3053271
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Integration of a system of differential equations MATLAB
I am a fairly new Matlab user which I had to explore to numerically integrate a system of differential equations. Now I am trying to resolve a simple equation but which gives me a "lambertw" output.
(s - 1) * exp(-s) = k
Therefore, for a given k,…
KannonX
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Transcendental equation solution by numerical method
I want to solve one transcendental equation numerically. I have used the function 'solve' for the solution but my results are varied as compared to graphical solution. My code is written below and I am sending the graphical solution results.
clear…
Rizwan
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Gaussian elimination modulo p
I'm trying to rewrite a code in Java solving a set of linear equations doing Gaussian Elimination on floats, to work on equations modulo a prime. The problem is that it does not work, and I cannot figure out what's wrong. It seems to work on small…
Jambaman
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Solving systems of nonlinear equations
Help. I am trying to solve this system of nonlinear equations in MATLAB for a homework assignment. I have tried wolfram alpha and this online equation solver, and neither of them work.
I have tried my graphing calculator and it keeps saying non…
user2928537
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Matlab: Solving Symbolic System of Linear Equations with Interpolation functions
I've been trying to solve a system of linear equations, with some variables being interpolated functions of other variables. I've tried turning these functions into symbolic functions, but that doesn't seem to work. Does anybody have a workaround…
teh_allchemist
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Wrong answers with Solving an equation
I am doing ray tracing and I have 5th order polynomial. So I am solving this one as follows but the answer at the end "tCounter" are quite different from the truth (I have the data as reference and it is different totally). But I couldn't debug it.…
Jack_111
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Get running total of numbers?
I am desperately trying to get the last column of my code to add up all the middle column numbers in a running total.. but it seems to start at 1 already.
Also, a side question: When I input 12.. I get 11 results, due to "y" starting at 1. Is there…
user2808966