Answered
start a predictive maintenance
Your explanation has offered no reason for anyone to expect that learning to use a tool like MATLAB would be a good way to solve...

18 giorni ago | 0

Answered
NLINFIT error of model being overparameterized
When you learn your model is overparameterized, there is no magical solution. You can do one of two things: Use a simpler model...

19 giorni ago | 0

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Answered
Selecting random element without replacement with capacity constraint
So where is the problem? Select a random set of customers. If that set violates the constraint, then try another set. If you don...

19 giorni ago | 0

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Answered
Trying to learn griddata function.
You have two (actually, three) problems here. First, GRIDDATA is a interpolation tool. What does interpolation mean? It means i...

19 giorni ago | 1

Answered
Why is 0.3 - 0.1 - 0.2 ~= -0.1 - 0.2 + 0.3
The answer arises by understanding how floating point numbers are stored in MATLAB. Here are 0.3, 0.1, 0.2, expressed each as w...

19 giorni ago | 1

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Question


Why is 0.3 - 0.1 - 0.2 ~= -0.1 - 0.2 + 0.3
I see this same question over and over again on Answers. Why do computations like this fail in MATLAB? 0.3 - 0.1 - 0.2 == -0.1 ...

19 giorni ago | 1 answer | 0

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answer

Answered
Solving Equations in MATLAB
SOME problems can be handled to find all solutions. syms x >> xsol = solve(cos(x) == 0,'returnconditions',true) xsol = s...

19 giorni ago | 0

Answered
interpn vs griddata, not producing the same results when interpolation is only in 2 dimensions
Are you testing for EXACT equality, which is something you should absolutely never do in any floating point environment? Instead...

20 giorni ago | 0

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How can ı generate 100 samples of zero-mean, unit variance gaussian noise ?
You need to read the manual. Read the getting started tutorials. (Try the MATLAB Onramp.) Else you will be asking hundreds of ba...

20 giorni ago | 0

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Answered
inline VS anonymous functions
I think what people are not drawing attention to here are the real differences between inline and anonymous functions/function h...

20 giorni ago | 1

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How to solve a time-varying polynomial with fractional exponents?
First, why would you possibly home for a UNIQUE solution? Be serious. There will be multiple solutions, some of them probably co...

21 giorni ago | 0

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Amplitude and phase estimation of a sinusoidal signal
Using tools from the curve fitting toolbox (fit). Or the optimization toolbox (lsqnonlin, or lsqcurvefit). Or the statistics too...

22 giorni ago | 0

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Solving complicated system of symbolic equations
Let me see.... eqn1 is a scalar, so it adds one piece of information. The same is true of eqn3. eqn2 is three pieces of informa...

24 giorni ago | 0

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Answered
Minimizing a function of two variables
First, LEARN TO USE MATLAB SYNTAX. That is, when you write an exprtession, learn to use MATLAB syntax when you write an expressi...

24 giorni ago | 0

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Local optima problem in minimization problem
On problems like this when you do not state the complete story we always find ourselves needing to read your mind. What is your ...

25 giorni ago | 0

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Answered
How do I find the itegration's order of convergence?
Um, you cannot just magically know the order of convergence of something. There is no simple rule where you can look at code and...

27 giorni ago | 0

Answered
Solving a linear ODE with along with an unknown constant.
syms k certainly does work. Ta = 20; syms k syms T(t) ODE = diff(T,t) == -k*(T-Ta); dsolve(ODE) ans = C1*exp(-k*t) + 20...

27 giorni ago | 0

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Answered
suggestion: please put an option to display variable data type in head function
This is not even a question. Answers is not a place to post feature requests for MATLAB. Answers is entirely composed of volunt...

27 giorni ago | 0

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Answered
Find the area of the regions enclosed by the curves y=x^2-2x, y=x.
You know the x locations of the two points where the curves intersect. Is the area not just the integral of y2-y1 between those...

28 giorni ago | 0

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Help me find the eigenvalues for the five interior vertices of the differential equation with the polynomial method
I've never heard this called "the polynomial method". And if your ODE was only slightly more complicated, then the result would ...

28 giorni ago | 1

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Answered
Since the matrix is near to singular I have tried pinv to solve but getting too deviated answers. Can you please let me know if there is any other way to solve the equations
So what can we say about the solution? David and Walter have both told you the matrix really is singular. A singular matrix will...

29 giorni ago | 1

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I need general MATLAB bvp4c code for study .
Then you are in luck. bvp4c is already available as part of MATLAB. What is the problem? Why do you say you need it? You already...

circa un mese ago | 0

Answered
roots() function does not give exact roots
What it seems is people have not explained the "cause" of the problem as seen. format long g roots( [1 -3 3 -1] ) Remember th...

circa un mese ago | 2

Answered
random numbers in Matlab 2009
There is no alternative, since rang does not appear to be a MATLAB function, nor was it ever a MATLAB provided function. I also ...

circa un mese ago | 1

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Set Limits for x in optimization using fminunc
If you have fmincon, then you also have fmincon so there cannot be a problem. This is not a question of how to get fminunc to so...

circa un mese ago | 0

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How can I solve a problem using Constrained Nonlinear Regression?
Sorry. lsqnonlin cannot handle general equalty or inequality constraints. Only bound constraints, and while you do have bound co...

circa un mese ago | 2

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Solving non linear system of equations
Are theta_rotor, theta_stator, and u_axial all known values? If not, then no, fsolve cannot solve it. But if we assume those are...

circa un mese ago | 1

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Integrating without using the symbolic toolbox
This is an arc length integral. Apparently you wish to compute the length of that curve in the plane, with x going from 0 to pi/...

circa un mese ago | 1

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Answered
Trying to solve this equation exp^(-((2.*n+1).*pi/2).^(2)*t)/(2.*n+1).^2 where n varies from 0 to infinity and the final equation is equated to zero to get value of 't'
First, exp is a function. Use it like this: syms n t exp(-((2.*n+1).*pi/2).^(2)*t)/(2.*n+1).^2 That presumes your parens were...

circa un mese ago | 0

Answered
sinh solver and numerical solution
One mistake in what you are both doing: Do not use == there to form equ1. Just subtract off the right hand side constant. The =...

circa un mese ago | 0

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