An algebraic equation of the form y = mx+b
A linear equation is an algebraic equation in which each term is either a constant or the product of a constant and (the first power of) a single variable. More on Wolfram and Wikipedia.
Questions tagged [linear-equation]
203 questions
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How do I convert if statement to linear equation?
I wanna convert this if statement to linear equation.
for i,j -> 1 to n
if D[i]>D[j] and f[i] > s[j] then w[i]+=c[j]
The line below is what has come to my mind so far, but I do not know how to write the rest. C(j) has to be multiplied by a phrase…
parham
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Is there an algorithm to average using different constraints on data?
Month
Product
Product
Product
Current
1
Y
A
17
2
Y
A
22
3
Y
A
21
4
Y
S
Q
44
5
Y
S
Q
32
6
Y
S
Q
23
7
Y
S
B
56
8
Y
S
B
73
9
Y
S
B
12
10
Y
C
26
11
Y
C
45
12
Y
C
37
As seen in table above I have some data,…
skylight
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Minimizing a system of linear equations with limited variables in Octave
I have scoured Octave resources, pdfs on optimization, and many of the questions here, but I can't seem to find or understand the right solution. I'm trying to find a corrective solution to move a group of data points to match closely another set.…
mhotkow
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1 answer
Matrix rank and determinant vs. linear combinations of column vectors using sympy
If a square matrix is not full rank, its determinant is zero, its column vectors are linearly dependent and we can obtain one of the column vectors as a linear combination of the others. Below is a matrix which, according to sympy, has not full…
Alice Schwarze
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- 21
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1 answer
Uniqueness of the Solution of a Linear Equation System
I solved a linear equation system with np.linalg.lstsq() but I could not define a boolean which returns TRUE if the solution of the system is unique. Thank you in advance!
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1 answer
Can I find coordinates that meet with linear equation?
I have linear equation and list of coordinates.
Can I find coordinates that meet with linear equation?
ZOOOO
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0 answers
Fortran warning for data type
I wrote the main program for a subroutine that solves a set of equations (Thomas algorithm) in Fortran. This is the code for a simple set of equations:
Program Thomas
implicit none
integer i
integer,parameter :: n=2
real,dimension(n) ::…
Elham Q
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votes
1 answer
Using Matlab's backslash operator to invert sparse matrices is leading to some entries being rounded down to zero
I am using Matlab's backslash operator to solve a system of equations written as two matrices M1 and M2. These two matrices are square and tridiagonal, and so I have defined them as sparse. For example, with the dimensions of each being 5x5, they…
teeeeee
- 641
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- 15
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0 answers
Solve system of linear equations for integer solutions
I would like to solve a system of linear equations with the added constraint that the solution vector must only contain integers. I assume this can be accomplished by something like intlinprog, but it is not clear to me how a regular linear equation…
Marcel Tesch
- 184
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Any available methods to speedup cvxpy scs solver?
I meet a problem with the speedup cvxpy solve method(basically use SCS solver)，the task contains lots of constraints and a big matrix. I have tried the following methods:
use mkl blas & lapack library to replace the original library. (got a little…
colin-zhou
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- 15
0
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1 answer
solving linear equationsystem in cpp using lapacke_dgesv
I am trying to solve a very simple equationsystem of the form M*Z=V, where M is a 2x2 Matrix, V and Z are Vectors with 2 entries. If i use Z = linsolve( M, V ); in Matlab the result is correct.
I need to implement this in C++ somehow so I am trying…
Bulbasaur
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- 5
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1 answer
How to solve linear symbolic equations in matlab
I'm trying to solve the following linear symbolic system (20 equations) in Matlab, I get all the values in the solution as zeros, is there any mistake in my implementation?
the data used in the code is here
data
%---------------------
% clear and…
Bilal
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python code for solving linear system by LDL^t factorization
I try to solve linear system that is ax=b by LDU decomposition where L is lower triangular , D is diagonal matrix and U is transpose of L which diagonal entries are 1
but there was error that "TypeError: 'int' object is not subscriptable"
here is…
김세윤
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- 2
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1 answer
Why does row echelon form work for finding the Rank of a matrix?
I have been studying Linear Algebra and came across gauss-elimination method. While it does give the correct answers , I am not able to understand how it works.
So, we compare each row with rest of the rows to see if any is dependent on the current…
Narender
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Eigen, parallel ConjugateGradient failed: More threads, more costs
I want to use a parallel ConjugateGradient in Eigen 3.3.7 (gitlab) to solve Ax=b, but it showed that more threads, more computational costs.
I test the code in this question and change the matrix dimension from 90000 to 9000000. Here is the code (I…
Richard LIU
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