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systems of equations, with constraints
This is a question more about understanding the mathematics of the problem, than of understanding how to solve it in MATLAB. Unt...

3 years ago | 1

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Answered
How to describe a function with a sum of discrete values?
Just use cumtrapz to perform the cumulative integral. help cumtrapz

3 years ago | 0

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Answered
change class syms to double
If your sym variable still contains ANY symbolic parameters, then nothing can change it to a number. A double connot store a sym...

3 years ago | 0

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Answered
Generating random points between two n-dimensional boxes
In 2-dimensions, I posted a solution on the FEX that would work. But 2-d is trivial. You triangulate the domain, then generate r...

3 years ago | 0

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Answered
Adjust the parameter of the Uniform Random Number Module
rand ALWAYS generates numbers in the interval (0,1). ALWAYS. You cannot change that. However, if you bother to read the docs for...

3 years ago | 0

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how to convert a real number/or integer into fixed number of bits?
I'm confused, by a confusing question. You want to convert a real number into a representation as a fixed number of bits, so co...

3 years ago | 1

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Answered
find maximum distance between a point (outside of polygon) and a polygon?
You DON'T need QUADPROG!!!!!!! There is no need to quadratic programming to solve the maximum distance to polygonal region. Al...

3 years ago | 1

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Answered
Why some points do not satisfy the condition?
So often this mistake is made. Are those the EXACT values of those coefficients? To me, that would seem a surprise, that they we...

3 years ago | 0

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How to repeat a vector over and over?
So write a function that does it for you. vec = 1:4; repvec(vec,7) vec = [0;1]; repvec(vec,8) function newvec = repvec(vec,...

3 years ago | 1

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Answered
Pentadiagonal matrix to solve for Pressure variable
WHY? Don't write code to do what was already written well by world class experts in linear algebra. You are using MATLAB. So use...

3 years ago | 1

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I cannot the error in the bisection method...
Get used to using the dotted operators for some things. That allows MATLAB to use vectorization in tools like fplot. f = @(x) x...

3 years ago | 0

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Hello! How to define on which plane lies a given point with coordinates? I have coordinates of plane and normal
Does a point lie in a plane? This is quite easy to do. The equation of a plane is a simple one. In fact, it works in any number...

3 years ago | 0

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Question

Should equationsToMatrix handle inequalities?
equationsToMatrix is a very nice tool. It works great to unpack an equality relation, like this: syms x y EQ = x + 2*y == 3 [...

3 years ago | 1 answer | 0

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answer

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polynomial curve fitting error
Is there a good reason why you called the script you wrote polyfit? Yes, I suppose you had a very good reason, because you wan...

3 years ago | 0

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Answered
How I can check if planes are parallel to each other in 3d?
planes(:,:,1) = [0 3 3; 0 0 3; 0 3 0; 0 0 0; 0 0 0]; planes(:,:,2) = [0 0 3; 3 0 3; 0 0 0; 3 0 0; 0 0 0]; planes(:,:,3) = [3 0...

3 years ago | 2

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Answered
What is the command for calculating expectation in MATLAB?
As a hint, generally, expectation and mean are terms with a similar meaning. Is there a function in MATLAB to compute a mean?

3 years ago | 0

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Answered
How can I restore image if I need to use command "interp2"
What does restore mean to you? Does it mean to some how recover the exact original image, after having interpolated it to some ...

3 years ago | 0

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Write a Gauss-Seidel preconditioner for ML
Learn what a sparse matrix is. And how to build them, how to use them. help sparse help spdiags The point being, you don't wa...

3 years ago | 0

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3D Surface of revolution from a 2D perimeter
Ok. (I should probably write code to do this in general, for any arbitrary polygon.) Quad elements. I'll show how to do it for ...

3 years ago | 0

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Answered
Solving a set of 8 non-linear equations using symbolic toolbox results in empty sym 0 by 1
NO. The equation POSSIBLY has a solution. In theory, it MIGHT have a solution. But having a theoretical solution does not mean i...

3 years ago | 0

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Find Indefinite Integral from Array Values
Sorry. there is no need for them to be exactly the same. Cumtrapz is a simple variation of a fixed stepsize Euler integration,...

3 years ago | 1

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How can I find a multiplication coefficient between two signal?
Your need is to solve the problem signal2 = constant*signal1 Where the variable "constant" is unknown. This is easy to solv...

3 years ago | 0

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Equation solution is not found for all array element
For SOME of these sub-problems, no solution was found. I would suggest that when the result from vpasolve is empty, you could ...

3 years ago | 0

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How to reduce dimensionality of a rectangular matrix
Your matrix has size 640000 by 288. So there are only 288 pieces of distinct information in your data. You CANNOT use PCA to do ...

3 years ago | 0

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Answered
Symbolic acos( cos(theta) ) does not return theta.
Is it true, that acos(cos(theta)) ALWAYS returns theta? TRY AN EXAMPLE. acos(cos(10)) So it is not true. It works the other wa...

3 years ago | 0

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curve fitting of two equation to two data sets simultaneously
Are the values of x the same for the two vectors y1 and y2? You don't show any data, so it is difficult to help more, as there ...

3 years ago | 0

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Create a single variable to store multiple correlation coefficients
A = rand(300,7); B = rand(1,300); C = corrcoef([A,B']); C = C(8,1:7) The correlation coefficiens of each column of A, agai...

3 years ago | 1

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How do I remove every row that has a zero in it?
TSLA = rand(366,7); TSLA(TSLA(:,4) == 0,:) = []; One line. No loops.

3 years ago | 0

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Answered
Creating a mxn matrix that is all zeros except for the middle row and middle column which are 1s
Clearly a homework assignment. But now long since past, and with multiple answers, most of which are not in one line. However, s...

3 years ago | 1

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find the index number using bsxfun command
But why would you use bsxfun at all to do this? A = [12 13 15 1]; B = [1 2 12 15 10 13 11 14 3 4 5 6 7 8 9 16]; Use ismember ...

3 years ago | 0