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Simmetry constraints in multivariate regression.
Sure. In fact, I can think of at least 3 ways to do so, almost trivially. Just estimate the upper (or lower half) of the matrix...

alrededor de 1 año hace | 1

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how to find curve fiitng equation through custom equation
You can't. Yes, I want world peace. But do you think that just wanting it is sufficient? Nothing I do will change it either. The...

alrededor de 1 año hace | 0

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Accidental deletion of project, how to contact file exchange admin
Why did you do that? Silly question, I know. ;-) Yes, it should be undoable. I'll contact the FEX admin and ask them to resolve...

alrededor de 1 año hace | 0

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Complex multiplication giving incorrect result
Yet another person who does not understand the realities of double precision arithmetic. Note that the imaginary part is roughl...

alrededor de 1 año hace | 2

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What is the best kind of MATLAB function to teach beginners?
I think I agree with @Stephen23, in that teaching symbolics first can cause issues. We see many new users who think everything s...

alrededor de 1 año hace | 1

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Different results of the same caculation by loop code and by array code
As is almost always the case, when we see this complaint, it is because you do not understand how arithmetic works in terms of d...

alrededor de 1 año hace | 0

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我买了学生版
Are you sure you have the student edition, and not the 30-day free trial? It would appear you have gotten the trial version, by ...

alrededor de 1 año hace | 0

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MINLP problem in MATLAB with both integer constraints and nonlinear equality constraints
NOPE. Were I writing that code, hoping to solve a problem with integer variables, and general nonlinear equality constraints, et...

alrededor de 1 año hace | 1

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How to stabilize the edge effects in a cubic B-spline?
You don't show any data, so there is little we can actually do in a constructive way. But you don't have a great deal of control...

alrededor de 1 año hace | 0

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What is the origin of "Weissinger Implicit ODE"
I usually laugh at the results of the AI tools available. Half the time they are blowing smoke, since they don't really understa...

alrededor de 1 año hace | 0

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my code does not have an answer
The failure of both vpasolve and fsolve suggests it is lkely no solutions exist at all for your problem. But merely the failure ...

alrededor de 1 año hace | 0

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Improved Euler's method compared to 4th order Runge - Kutta's method
Is it as good? COMPARE IT TO THE ANALYTICAL SOLUTION! We have gone through exactly this before. A big problem however, is you a...

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Clarification on Calculations for $v_{1,z} $ in "A Method for Verifying the Generalized Riemann Hypothesis"
I think, from almost line 1 of what you did, you don't understand double precision arithmetic, and that will cause everything yo...

alrededor de 1 año hace | 0

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Is the methodology used in "sdRemoveImpossibles" a heuristic or is it derived from an academic publication?
Note that just because something is found in a paper, does not make it even necessarily good mathematics. The lack of any requir...

alrededor de 1 año hace | 0

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Infinite while loop for Euler's method in order to solve ode
I think you misunderstand what is happening. Your ODE is y' = y - y^2/2 ymax is found when y' = 0, and so you find that y...

alrededor de 1 año hace | 0

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generate random numbers among each non zero column elements
This is a 7 year old question, so there is probably no real utility in my posting an answer. But it is an interesting question t...

alrededor de 1 año hace | 0

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Surface triangulation of 3D points cloud
A common solution is to use a CRUST code. In fact, there is a version of CRUST to be found on the File Exchange, here: https://...

alrededor de 1 año hace | 0

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Identify two linear trends from the data
The amount of noise in your data makes it almost impossible to estimate the two trends in any intelligent way, even assuming the...

alrededor de 1 año hace | 0

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How can I make the following heatmap smoother while preserving the contours outlined by the green line?
I don't think interpolating your data will fix the problem, as your data is seriously bumpy. load DataMe.mat surf(TPP) view(...

alrededor de 1 año hace | 0

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Cannot Understand a Command
I would guess what they did was to ask you to write a matrix by something like the following description: M(a,b) = a + b w...

alrededor de 1 año hace | 0

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Solving non linear system with fsolve
Whenever you have a problem with hugely varying constants in it like this, it makes sense to consider if you should transform th...

alrededor de 1 año hace | 0

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How do I find the equation of points on a spline curve?
This is a question that gets aslked many many times about splines. And, well, you can't easily get a simple equation, as there i...

alrededor de 1 año hace | 0

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Too many input arguments error in objective cost function using fminsearchbnd
Did it even work using fmincon? I can't test that out, since we lack your data. And lacking your data, I can't test fminsearchbn...

alrededor de 1 año hace | 1

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How to map voltage to battery percent?
This is just a simple linear interpolation. Think about it! Suppose you subtract 45 from the voltage. When V was zero, you now ...

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Constraint set to be a real number
First, constraints like: AV_constraint_1 = isreal(A_v); are not differentiable. Sorry. They can't be used in fmincon. Well, y...

alrededor de 1 año hace | 0

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Numerical integration (Trapezoid, Simpson, Gauss)
"shouldn't Gauss' 3 points method give the best value for the integral ?" Why? In fact, no. There is no reason for that to be t...

alrededor de 1 año hace | 0

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Why does MatLab give non integer values for whole numbers?
It is not even remotely ridiculous. Are you seriously claiming that the vector [0.7071;0.7071] is NOT a null vector? Any mult...

alrededor de 1 año hace | 1

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Does anyone know how to get solve to work with one of the variables being a range
Solve does not directly allow you to define a variable as being in a range, but assume will help you out, as I show below. Anywa...

alrededor de 1 año hace | 0

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Algorithm which finds lower bound of the epigraph of a discrete 2D curve which is not a function (i.e. fails vertical line test)
Is there an algorithm that solves it in some slick way? Not that I know of. How would I solve it? Treat this as a way to find ...

alrededor de 1 año hace | 1

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Simplify in GF(2)
In the help docs for simplify, we see: "S = simplify(expr) performs algebraic simplification of expr." The key word there is A...

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