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Converting between x,y cartesian variables to angle in symbolic variables
No, the toolbox will never try to understand your equations, and then infer what the variables mean to you, and then perform sub...

2 mesi fa | 0

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how write a matrix with specific features
I think you are confused about what you can do with MATLAB. Those constraints simply tell you the associated matrix for the grap...

2 mesi fa | 1

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I have a nonlinear equation with a symbolic variable and cant solve it.
Look carefully at your problem. n = 2.1; alpha0 = 0; syms p alpha eqn = p^(n+1) - alpha0*p^n + p -(alpha0 + alpha) == 0 So ...

2 mesi fa | 0

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findging eigenvectors with eigenvalues
Most of the time when I see someone worry their eigenvectors are not correct, it is just because of a sign error on the eigenvec...

2 mesi fa | 1

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Library function log10 not found when using fit
x = rand(10,1);y = x + rand(10,1); fit(x,y,'log10') It is almost always, ALWAYS the case that when this happens, you were prev...

2 mesi fa | 1

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iterative estimation of eigenvalues and eigenvectors by the inverse power method. Your MATLAB/Octave code shouldn’t be hardcoded. ● Calculate the eigenvectors and eigenvalues
Let me guess, you have a problem with this matrix. Does the matrix have any special properties? What, for example, are the eige...

2 mesi fa | 0

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using PCA to filter outliers in MATLAB
I've attached my quick shot at an n-dimensional outlier tool, based on Mahalanobis distance. I am pretty sure it has some seriou...

2 mesi fa | 1

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How do I plot a symbolic equation that I have created?
By the way, there is NOTHING symbolic in the code you wrote. syms t % this makes t symbolic % no need to put decimal points ...

2 mesi fa | 0

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scatter command not working
(It is good you are using the tutorials.) But first, learn to read the error message, an important skill in using MATLAB, unless...

2 mesi fa | 1

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Nonlinear optimization with branching solution space
Just solve 11 distinct problems, each of them continuous. Use a loop, setting x to each of the 11 possible values. Save each sol...

2 mesi fa | 1

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how to create nxn matrix with main diagonal that enters odd rows/columns with zero and even ones start with 2(n+1) sequence
Simple is to use diag. n = 5; % Now many non-zero elements will we have? N = 1:(2*n); % a simple index vector D = N.*mod(N-1,...

2 mesi fa | 0

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Does I properly translate the equations in matlab code?
Ouch. That would be a miserable set of equations to try to code. (You have my sympathies.) I did some very quick spot checks, an...

2 mesi fa | 0

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problem in curve fitting
C1 continuous? Is there a difference? Absolutely YES. C1 continuity, using circular "arcs" in 3-d? UGH. I'm a career mathemati...

2 mesi fa | 0

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species go to negative values
Remember that the software does not truly understand your model, and what you are attempting to simulate in that model. It only ...

2 mesi fa | 0

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Better "probabilities"?
How effective is rand? I'm not sure what you mean by "effective", or for that matter, "advanced". It is a state of the art rando...

2 mesi fa | 1

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Need help solving heat equation using adi method
You say it works for sufficiently small values dt. With that exp(t) term in there, do you seriously expect it to work well for...

3 mesi fa | 0

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Non-linear Algebraic 36 equations unsloved
Actually, a starting value set like ones(36,1) is often a dangerous thing to do. Making all of the starting values the same can ...

3 mesi fa | 0

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math model of neural network fitting
As is often the case with such "models", there is nothing you could write down, at least not easily, and without nasty arrays of...

3 mesi fa | 0

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About Fluid dynamics in a porous medium...
As @Torsten said, this is far too vague a question. I would suggest starting with a far simpler problem, especiially good is if...

3 mesi fa | 0

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inversing huge Y Matrix
As always, I'll start by saying that computing the inverse of a matrix is a bad idea. And of course, you don't say what you thin...

3 mesi fa | 0

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How can I solve this implicit function in MatLab?
Trivial, in some eyes. ;-) This is one of the simpler implicit problems you might write down, since a direct solution exists in ...

3 mesi fa | 1

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How to add unknow parameter in matrix and solve it by use det() syntax for finding w
syms w; m1 = 1.8; m2 = 6.3; m3 = 5.4; m4 = 22.5; m5 = 54; c2 = 10000; c3 = 500; c4 = 1500; c5 = 1100; k2 = 1*10^8; k3...

3 mesi fa | 0

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solving linear systems of equations
A long forgotten question and one with an answer that may not be appreciated by @Chloe St John, given that multiple questions by...

3 mesi fa | 0

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MathWorks Administrator Account Privileges
Contact customer support at MathWorks. That is not Answers. We cannot help you directly. https://www.mathworks.com/support/cont...

3 mesi fa | 0

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When integrating acceleration do you need to convert velocity?
When you keep on subtracting off the mean, you do strange things to the result. But you need to consider what a constant of inte...

3 mesi fa | 0

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How to efficiently solve a system with an infinity number of solutions?
Note that a solution need not always exist for all n. When n==1, and so A is a 1x1 matrix, it is completely known. So unless yo...

3 mesi fa | 0

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How can I calculate the integral of Legendre function P(n,theta) ?
@Shreen El-Sapa I think you do not understand that a Legendre polynomial is meaningless over some other interval. It has no spe...

3 mesi fa | 1

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Create a matrix and a map of Hydrologic Soil Group values using integer or character values
MATLAB does indeed allow you to produce a character matrix, with those characters. However, I assume you have scattered data, wi...

3 mesi fa | 0

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Determine row vector out of matrix with most evenly spaced and distributed values
Simple. Sort of. But you need to define what equal spacing means to you, and how you will measure the deviation from equal spaci...

3 mesi fa | 0

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Are polyshape vertices preserved reliably without floating point errors?
Um, probably, yes. But potentially no. Yes, because on most operations, you will just be indexing into the original set of vert...

3 mesi fa | 1