Questions tagged [equations]
194 questions
0
votes
1 answer
Difference equations with initial and final condition in matlab
Consider the following equations:
enter image description here
x_1(k+1) = 2x_1(k) + 0.2x_2(k)
x_2(k+1) = 2x_2(k) - 0.4λ_2(k)
λ_1(k) = 0.1x_1(k) + 2λ_1(k+1)
λ_2(k) = 0.2λ_1(k+1) + 2λ_2 k+1)
k=0, 1, 2… 10
x_1(0)=2 x_2(0)=0 …
S.Rostami
- 9
- 2
0
votes
0 answers
Finding values of two variables with two equations in Python
I am simply trying to find the values of the two variables X and Y using the following system of two equations, in Python:
z = arccos [(sin(a) * sin(X)) + (cos(a) * cos(X) * cos(Y - b))]
Az = arctan2[(cos(X) * sin(Y - b)) , (cos(a) * sin(X)) -…
0
votes
2 answers
How to past the text without formatting loss in MathType editor
I would like to convert the 'text to MathType' in word document.
For example I have already keyed the text "A2 + B2 = C2", instead of keyed in MathType editor. So I have tried to copy and paste that text into MathType editor, while doing so the…
Prabhu M
- 21
- 5
0
votes
1 answer
Solving set of exponential equations in python
Trying to solve a set of exponential equations but keep getting errors saying that "can't convert float" or "float is not callable"
You may run the code, just replace the variables with any values you'd like.
from sympy.abc import x, y
import numpy…
Salchem
- 118
- 1
- 2
- 11
0
votes
0 answers
How to execute an equation with variables from 3 lists and make a list of results?
from __future__ import division
import numpy as np
import math
from math import *
import random
a_1 = -3.54
a_2 = 0.83
b_1 = 9601.0
b_2 = -2366.0
c_1 = 196.0
c_2 = 32.0
mpf = 0.6 #maximum packing…
Rob C.
- 11
- 1
0
votes
2 answers
Solve a system of many algebraic equations in Matlab
I am trying to solve a system of nine algebraic equations in MATLAB of the following form:
eq1 = x1 * 3.12091E-17 * 10.96 * exp(x2 + x3 * 4.96) - 1765;
eq2 = x1 * 3.12091E-17 * 5.08 * exp(x2 + x3 * 5.09) - 720;
eq3 = x1 * 3.12091E-17 * 57.2 *…
I.M.
- 9
- 2
0
votes
1 answer
VBA (word) Writing a equation in a table
So I am working on a word template which needs to automatically write specific data in specific places of the document. Now I Need to write and mathematical equation in a cell (for example: 〖∆U=α〗_(steel )∙ ∆T ∙ ∆L_vp) I know I need to replace…
Fyer-Zero
- 123
- 2
- 11
0
votes
1 answer
Basic math functions in VB.net
So i am currently in process of adding a basic calculator that allows the user to define 2 variables and then press a button that puts the variables into a basic math equation and presents the result but i think i have gone about it completely…
David Hosker
- 17
- 3
0
votes
1 answer
Summation of Equation Program
So basically I'm trying to make a program that will do equation for every value of nStart to nEnd. This is my code so far
def summation(nStart , nEnd , eqn):
sum = 0
while nStart - 1 != nEnd:
sum = sum + eqn
nStart += 1
…
Joy
- 7
- 3
0
votes
0 answers
locate the 3D point given the distance via python
I wanna locate a 3D point, given the distance between three base point.
I tried spicy.optimize.fslove, but it seems that the result is not satisfying.
point1 = [0., 0., 0.]
point2 = [1., 0., 0.]
point3 = [0., 1., 0.]
def solveLocate(x):
xp =…
KeyYD
- 1
- 1
0
votes
3 answers
php - Is it possible to use result of equation stored in a variable directly?
For example
$var = '10/2';
Is there a way for me to output the value 5 from that easily?
So something like this:
$foo = ($var) + 5;
I want $foo to have a value of 10?
Currently, the best way I know is to explode $var and then divide $var[0] by…
T. Short
- 3,481
- 14
- 30
0
votes
1 answer
How to solve differential equation in matlab
How can I show that y(t)=Yo/Yo+(1-Yo)e^-at is the solution of the differential equation dy/dt=ay(1-y) using MATLAB. What function should I use?
Rachel
- 43
- 1
- 8
0
votes
3 answers
equations with 3 numbers not displaying on HTML
I'm writing a math problem generator, but when I run it only equations with 2 numbers are displayed, anything more and it says "undefined" and refuses to show the answer. Here is the entire code(please note it is incomplete right now)
var type =…
0
votes
1 answer
Parentheses under equations with two lines of text Rmarkdown
I would like to write in a Rmarkdown document an equation with some explanations below it. I have found the functions \underbrace{} coupled with _\textrm{}.
\underbrace{X}_\textrm{Text1 for X} = \underbrace{Y}_\textrm{Text1 for Y}
This is working…
Robin.N.
- 99
- 8
0
votes
1 answer
autocorrect the whole math equations within ms-word
I have written a plain text in notepad editor. This text contains some embedded mathematical formulas like \sumw_if(x_i) which refers to \sumw_if(x_i) or \alpha^2 + \beta^2 = \gamma^2 which refers to \alpha^2 + \beta^2 = \gamma^2etc.
Now, I'm…
mohsine mohsine
- 1
- 2