Questions tagged [equation-solving]
763 questions
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count the digit for the given number
Given a number N. Count the number of digits in N which evenly divides N.
Note :- Evenly divides means whether N is divisible by a digit i.e. leaves a remainder 0 when divided.
Input:
N = 12
Output:
2
Explanation:
1, 2 both divide 12 evenly
Expected…
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Computing an equation-based variable in SPSS with Euler's number
I'm currently working with a large population dataset in SPSS, and at this stage of my analysis I would like to predict how many people are at risk of having nonalcoholic fatty liver disease (NAFLD). I have all the necessary inputs (i.e. BMI, waist…
WelshBOCS
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How to define transfer variables when solving equations in 1stOpt?
I am trying to solve a non-linear integration equations in 1stOpt. The parameters to be solved are x1, y1, Uratio, and 5 transfer variables are used to build the equations: Left, Right, C, pl, pr.
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Problems
1 The code…
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Solving an equation with one variable in Python
I am trying to solve the equation: log(1+x)/x - 1/(1+x) == 2/3 * q * x**2 for x with q = 4e-4
I tried
import numpy as np
import scipy.optimize as so
q = 4e-4
eqn = lambda x: np.log(1+x) / x - 1 / (1+x) - 2/3 * q * x**2
sol =…
Matrix23
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Pressure ratio vs Friction and other geometric factors
The problem I am facing consists of plotting the graph I attach, only the discontinuous lines at the moment.
.
For that purpose I need to take into account these equations:
.
Before starting explaining the process, there is one constant, gamma=1.4,…
Néstor Indu
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How to make a C program to find the interval of a root of an equation
I need help making a C program that calculate the root intervals of a given equation. I made a program based on the concept that if f(a)f(b) < 0, then there exists at least one root in (a, b).
#include
#include
#include…
Tiến Đạt Lê
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Fsolve with multiple vector equations
I am trying to solve an equation similar to the simplified example
x / x.sum - b = 0
where x is an n-dimensional vector. Since one can multiply x with any constant without changing the equation, the solution is up to a normalization. Because of…
eigenvector
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Find the direction in which to look for a solution
Good time dear forum participants!
So, I just need an advice for direction, in which to look for a solution. For example, terminology in mathematics, or examples of similar problems.
I have 3 lists of values A, B and C
A is a list of constants
B is…
Ingenieur
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Is there any way to solve this equation in r?
Suppose I have this equation:
prev = P12/(P11 + P12)
with
P11 <- exp(-(sigma+alpha_h)*t-(beta1_dot_h/beta2_h)*(exp(beta2_h*(x+t))-exp(beta2_h*x)))
for P12 is a little bit long equation so I divided into 3 parts
part1 <-…
Farrelyto Theodorus
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Solving an equation in r
Suppose I have the following equation:
sigmagm <- function(sigma){
(-sigma*t) - (alpha_h*t) - ((beta1_dot_h/beta2_h) * (exp(beta2_h*(x+t)) - exp(beta2_h*x))) - ((beta1_dot_h/beta2_h) * exp(beta2_h*x)*(1 - (1+gama) * exp(beta2_h*t))) + (alpha_dd +…
Farrelyto Theodorus
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Sympy.solve can't eliminate intermediate symbols from systems of equations
WHAT I WANT TO DO
I am building a DIY robot arm. I need to design the length of the links, the joint configuration, and motors size function of my working area and payload.
I decided it would be a fun project to make a program to help me with the…
05032 Mendicant Bias
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Is there a method to create a Sympy equation solving system that recognizes the type of equation as well
I am making an equation solver using sympy. I plan the UI to be a single input field. However, I am not sure that how to make the system recognize the type of equation, lets say simulataneous, diffrential etc. Can anyone guide on this? Thanks
I am…
Hazza Barq
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How can I control my WIFI router configuration in an Android app without using webview?
I want to create An android App to control WIFI router configuration such as change WIFI password , name change limited device and more .
but without used webview
I do not know what should.
please help me.
I Wanna Some one to guide me to right way.
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RPLy parsing problem with implicit multiplication and precedence
I'm using Python's RPly to make a basic algebraic/mathematical equation parser, and I'm having a problem where unary operations make things a bit odd.
with unary operations implemented the way I have:
1 + 2 + 3 : 2 + 3 gets evaluated before 1 + 2…
Tom the Bomb
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Setting up 2x2 system of equations where one unknown is dependent on the other
I'm trying to solve a system of equations to find a point where a line originating from a known point intersects with a known function:
m*x_3 - y_3 = m*x_2 - y_2
Where it also holds that for the given function f:
y_3 = f(x_3)
It's certainly a system…
Sam
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