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solving nonlinear equation using newton method
You just misunderstand how to use the exponential function. In MATLAB, e^x is written as exp(x). That makes your fn as: fn = @...

1 month 前 | 0

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How to Set a Minimum Step Size for Variables in GA Solver (Global Optimization Toolbox)?
Really easy. Don't think of a step size for the GA solver. It does not take steps anyway, not like fmincon or other solvers of ...

1 month 前 | 1

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Solution of system of nonlinear equations
This will be literally impossible to do in double precision, given the huge dynamic range of those coefficients. But we can look...

1 month 前 | 0

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Support with interpolation using interp3 in MATLAB
And ... your question about MATLAB is? Far too much vague verbiage to know what is the problem. If you want to know how to use i...

1 month 前 | 0

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Ode45 g and dg
You cannot use the variable dg4, before it is defined. And we see you do this: dg2=m*A+k*g(1)+h1*k*g(3)+dg4 ... dg4=h1*k2x*g(...

1 month 前 | 1

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fitting with custom equation
(I assume you intended to write 1/y, and not I/y, where the variable I is not defined.) y = [1.6E5 2.5E5 4.1E5 8E5 1E6 2E6 7E6 ...

1 month 前 | 1

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improve fit compared to R
x = [0.858734025700000 0.975248753121875 1.02525125312812 1.13140821289062 1.15927407430000 1.18768630564687 1.21665290240...

2 months 前 | 1

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Some .jpeg photos can not be processed by Matlab code.
I've not even looked at your code. But you have jpg images, uint8 code values. So I wonder if adding the code values caused an o...

2 months 前 | 0

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Finding concave hull around abstract shape
I don't know the soure of this data. But, can you start with the two pieces as separate entities, form polyshapes from each, and...

2 months 前 | 1

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Numerical Integration MATLAB vs Python/VBA
This is difficult to say, because we know virtually nothing. First, does the problem arise from the use of subtly different da...

2 months 前 | 0

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Warning: Explicit solution could not be found./ empty sym
Does an analytical solution exist for EVERY equation you can write down? (No.) Even if such a solution does exist, is it certain...

2 months 前 | 0

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fmincon is not converge
It is very rarely easy to know why a solver fails to converge on a messy thing like this. But you should never let it come to th...

2 months 前 | 0

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Is there any way to perform an at least partially symbolic smulation (using ODE or discrete model) in simulink?
Essentially, no. This is a frequent question about tools like ODE45 too. Simulink is a purely numerical tool, like ODE45 and oth...

2 months 前 | 0

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d solve command matlab
syms e P S A t m V0 t0 V(t) real The point being that assumptions can apply only to variables, not functions. V(t) is a functio...

2 months 前 | 0

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Plotting data dependent on three independent variables.
Do you have a 4-dimensional holographic monitor? That is, you can plot things in 3-dimensions. You will see a projection into a ...

2 months 前 | 0

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vector output of a symbolic vector
syms s X Y Z l1 = X*s - 1 == 3*X + Y + Z + 2/s l2 =Y*s == - X - Y - 1/s^2 l3 =Z*s - 2 == X - Z - (s - 1)/s^2 [Xsol,Ysol,Zsol...

2 months 前 | 0

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Optimisation of three function in two variables
There may be an issue here, if you think you can maximize them all simultaneously. The (x,y) coordinates that maximizes one func...

2 months 前 | 1

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About fitting one curve with one equation and calculating two values from fitting
Suppose I gave you a set of data, and asked you to tell me two parameters from the data. All I need is one data point, More woul...

2 months 前 | 0

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How to fit this model with a Weibull distribution?
If this is data that you think comes from a Weibull, then you do not want to use regression techniques to fit the distribution. ...

2 months 前 | 0

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how i can show in matlab tha sqrt(x^2)=x in symbolic toolbox
Except, that equality does NOT hold! The sqrt "function" has two branches. sqrt(x^2) can as easily be -x, as it is x. So you can...

2 months 前 | 1

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I keep getting 4 answers per variable in 4x1 sym
L = 225; % Length of the ship in meters B = 32; % Beam of the ship in meters T = 12; % Draft of the ship in meters v = 0.5; %...

2 months 前 | 1

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Find zero of simple monotonic function where the independent variable can only be integer
@Michael Albert No. You just THINK there is some obscure MATLAB function to solve your problem. You do not know that to be the ...

2 months 前 | 0

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Why is my test accuracy higher than validation accuracy?
Not really. It might be a reflection that you needed more data, that your sets are just not large enough. The law of large numbe...

2 months 前 | 0

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What is happening with the line of best fit here?
StrainStress = [0.00005 010.1; 0.00007 014.3; 0.00011 021.8; 0.00014 027.6; 0.00020 040.0; 0.00030 061....

2 months 前 | 1

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已回答
Generating a matrix of 0s and 1s with constrained domains
Are you saying you want to break the matrix into a set of regions, where within the region, the matrix contains zeros, and the r...

2 months 前 | 0

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How to provide a positive and negative value for the tolerance value?
Good answer by @Voss of course. I'll merely add a few points of interest. You could just test to see if the current term being ...

2 months 前 | 1

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Finding out lengths of sequences of numbers in a set of vectors
It took a few seconds staring at the output you expect to see, and realize what you meant. I THINK the first element in each row...

2 months 前 | 1

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Is there a premade file regarding a verification test to see if there is any issues with the installation?
Is there anything that will test every line of code in MATLAB? Every toolbox you have purchased? No. Not that is given out to yo...

2 months 前 | 0

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I have a question relate to Gauss seidel method
Updating the vector x (small x) and then looking to see if the vector X (capital X) is converging seems like a bad idea. You did...

2 months 前 | 0

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integral using "int" function
Not everything you write down will have a simple, algebraic solution. As much as people seem to think they are, computers are no...

2 months 前 | 0