equation-solving Questions
2
Solved
I am trying to apply an equation to two matrices. Since I am a beginner R user, it seems very difficult to me. I would be greatful if you could give me some advice.
I have two similarity matrices:...
Panier asked 26/11, 2013 at 13:45
2
Solved
I am trying to solve this system of ODEs through deSolve, dX/dt = -X*a + (Y-X)b + c and dY/dt = -Ya + (X-Y)*b for time [0,200], a=0.30, b=0.2 but c is 1 for time [50,70] and 0 otherwise. The code I...
Sneaker asked 4/11, 2021 at 16:57
3
Solved
I have what seems to be an easy problem to solve in Python, but as I am new to python I am unaware on how to solve this.
All I am trying to solve is...
(x * e) mod k = 1 (where e and k are known...
Sabinasabine asked 16/4, 2013 at 18:35
3
Solved
I want to solve some system in the form of matrices using linalg, but the resulting solutions should sum up to 1. For example, suppose there are 3 unknowns, x, y, z. After solving the system their ...
Anarthrous asked 28/6, 2015 at 9:40
3
Solved
I want to find the solution of:
-x^3+6*x^2+51*x+44=0
but with R. Is it possible?
I found the package Ryacas, but nobody seems to be able to make it work.
May sound trivial, but I'm not able ...
Epencephalon asked 16/9, 2015 at 3:21
2
Solved
I'm trying to solve this exponential equation like this:
my ($l,$r);
for (1 .. 100) -> $x {
$l = $x * e ** $x;
$r = 5 * (e ** $x - 1);
say $x if $l == $r;
}
But it doesn't work. How t...
Prevot asked 5/4, 2020 at 21:34
2
Solved
Solve the system of two equations with two unknowns below:
a1, b1, c1, a2, b2 and c2 are inputted by the user himself.
I've been trying to find a math solution for the problem first and I can't...
Hypoderm asked 27/10, 2013 at 14:36
7
Solved
I am coding a function that solves an arbitrary number of simultaneous equations. The number of equations is set by one of the parameters of the function and each equation is built from a number of...
Research asked 29/2, 2012 at 2:52
8
Solved
In a C++ application I'm coding, I need to solve a system of non-linear equations (N equations, N unknowns).
The systems I'm solving will be rather small (up to 10 equations/unknowns), so performa...
Aston asked 20/11, 2010 at 17:16
2
Solved
I am solving this system of equations with tensorflow:
f1 = y - x*x = 0
f2 = x - (y - 2)*(y - 2) + 1.1 = 0
If I choose bad starting point (x,y)=(-1.3,2), then I get into local minima optimisin...
Lichenology asked 29/5, 2018 at 1:54
4
Suppose I have the following equations:
x + 2y + 3z = 20
2x + 5y + 9z = 100
5x + 7y + 8z = 200
How do I solve these equations for x, y and z? I would like to solve these equations, if possibl...
Yovonnda asked 16/11, 2011 at 1:55
2
Solved
Suppose I have the following system of equations:
a * b = 5
sqrt(a * b^2) = 10
How can I solve these equations for a and b in R ?
I guess this problem can be stated as an optimisation problem, ...
Kincardine asked 16/2, 2018 at 18:19
1
Solved
How would I solve an equation containing a summation expression, i.e.
something like.
I would consider the following code fragment to solve this equation:
from sympy import *
i, N, x = symbol...
Evelineevelinn asked 2/10, 2017 at 7:55
1
Solved
Assuming I have the following four equations:
cos(x)/x = a
cos(y)/y = b
a + b = 1
c sinc(x) = d sinc(y)
for unknown variables x, y, a and b. Note that cos(x)/x=a has multiple solutions. Similar...
Comitative asked 27/3, 2017 at 16:42
3
Is there any algorithm to solve a system of equations expressed in different modulo spaces?
For exemple, consider this system of equations:
(x1 + x2 ) % 2 = 0
( x2 + x3) % 2 = 0
(x1 + x2 + x3) % 3...
Burress asked 4/2, 2017 at 19:46
8
Solved
I'm trying to work out how to write the following:
total = (value * 0.95 ^ 0) + (value * 0.95 ^ 1) + (value * 0.95 ^ 2) ...
or:
x = (y * z ^ 0) + (y * z ^ 1) + (y * z ^ 2) + (y * z ^ 3) ...
T...
Meilhac asked 17/11, 2016 at 14:14
2
Solved
I'm currently in need of a class, which must be able to display and solve an equation system like this one:
| 2x-4y+4z=8 |
| 34x+3y-z=30 |
| x+y+z=108 |
I thought it would be a good idea t...
Sheepshead asked 1/4, 2016 at 11:8
2
How do I solve a non-linear equation in SymPy which is of the form
y = P*x + Q + sqrt(S*x + T)
where I know y(0), y'(0), y(c), y'(c). I want to find P, Q, S and T. and represent y as a function ...
Jodijodie asked 26/3, 2016 at 7:40
2
I have an polynomial equation of 4th order and I need to find all roots.
Simple example:
from sympy import (Symbol,solve,I)
a=4+5*I; b=3+7*I; c=12-56*I; d=33+56*I; e=345-67*I; x=Symbol('x')
eq=a...
Cork asked 6/2, 2015 at 13:14
5
Solved
I need help to solve this formula ((n * 2) + 10) / (n + 1) = 3, preferably in PHP. (The numbers 2, 10 and 3 should be variables that can be changed.)
I'm able to solve this equation on paper quite...
State asked 31/8, 2011 at 7:56
1
Solved
I want to solve linear and quadratic modular equations in Haskell in one variable. The way I am doing it right now is by putting x = [1..] in the equation one by one and finding the remainder (expr...
Renny asked 26/10, 2015 at 10:0
1
Solved
Given the equation |x - 5| + |y| = 5, how can one solve it using SymPy?
If I'm using a combination of solve() and Abs() it gives me this error
solving Abs(x - 5) when the argument is not real o...
Hass asked 17/10, 2015 at 16:2
2
Solved
I have a equation system and I want to solve it using numerical methods. I want to get a close solution given a starting seed. Let me explain.
I have a vector of constants ,X, of values:
X <...
Nauseous asked 17/9, 2015 at 7:55
6
Solved
This is a bit difficult to explain without a direct example. So let's put the very simplistic ideal-gas law as example. For an ideal gas under normal circumstances the following equation holds:
PV...
Hand asked 25/3, 2015 at 10:43
2
Solved
I was wondering whether there exist any packages or other pre-built solutions for R that are capable of translating sets of linear equations into matrix form (e.g. for solution via the Gauss Seidel...
Gurgle asked 22/11, 2014 at 11:36
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