Answered
Replacing special character 'É' to 'E'
Easy peasy. str = 'ABCDEFGHIJKÉÉÀÀÄÄabcdefghijkl' strrep(str,'É','E') If there are other special characters you want replaced...

3 years ago | 0

Answered
Broad confidence bound range when fitting in Matlab
Wide confidence limits are typically a symptom, a reflection of uncertainty in some form. And unfortunately, we don't have your ...

3 years ago | 1

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How to perform svd without using the inbuilt function?
Why? That is, why is SVD not acceptable? Yes, you could write a complete code to compute the SVD, without using a call to SVD. ...

3 years ago | 0

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Why am I getting this error? "Array indices must be positive integers or logical values".
Is P0 a function? (NO. It is a scalar variable.) You have this: P_twitch_short(i) = P0(0.0258*(exp((stiff*RLS)))-0.0258); Did...

3 years ago | 1

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How to recover jpg or RAW images?
I'd be looking at my backups. (A GREAT thing to do.) Of course, if you are asking this question, there are no backups. Before th...

3 years ago | 0

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I need to smooth a 3d graph
x=1:10; y=1:21; z=[0 0 0 0 0 0 0 0 0 0; 0 0 0 0 0 -9 0 0 0 0; 0 0 0 0 -5 -7 0 0 0 0; 0 0 -10 -25 -15 -5 0 0 0 0; 0 -20 -32 -46...

3 years ago | 0

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How i can solve the problem of primitive root?
What you mistake is that a and p are represented as DOUBLES. Can you compute a number as you want to do? What happens? a = 3; ...

3 years ago | 1

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Answered
Best way to solve this non-linear equation?
dsolve is not used to solve a PDE. It applies ONLY to an ODE or a system of ODEs. help dsolve There are no symbolic solvers in...

3 years ago | 0

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Empty sym: 0-by-1
Don't write a whole mess of code, withput actually thinking about whether virtially the very first (significant) line you write ...

3 years ago | 0

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simpsons 1/3 rule calculating error
Before you worry about how to plot things, and compute the error, should you worry if your code is correct at all? Gosh, that ju...

3 years ago | 1

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Answered
How find the function (equation) of the fitting surface using interpolation (method biharmonic)?
This question is asked hundreds of times on the site. The answer is, there is no simple "equation" you can write down. That is t...

3 years ago | 1

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What distribution is appropriate for my data?
Why would you expect a distribution like that, with a strange hump on one side to have some predefined distribution that fits it...

3 years ago | 0

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Plot two functions in one diagramm with different y-axis limits
Easy peasy. x = linspace(-5,5,1000); y1 = sin(x); y2 = cos(x); y2(y2 > 0) = NaN; plot(x,y1,'b-',x,y2,'r-') ylim([-1,1]) y...

3 years ago | 1

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Answered
How to change Options of PSO during iterations?
Sorry, but no. You cannot change the options for a solver in the middle of the solve. This is essentially true for any solver. (...

3 years ago | 0

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Solving Nonlinear System of Equations with 10 variables
Use fsolve. You are trying to formulate this in terrm of a symbolic variables, but fsolve is a NUMERICAL solver. So you need to ...

3 years ago | 0

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i want to solve for 'L' using iteration method in MATLAB for the equation below
help fzero Consider that your question is the same as (gT^2)/(2*pi) tanh (2*pi*d/L) - L == 0

3 years ago | 0

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How to find the maximum element by length without a loop?
I'm a bit confused as to your question. If you want to choose the longer of two strings, then do as @Florian Bidaud suggests. Bu...

3 years ago | 1

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MatLab eig vs LAPACK
If I had to guess, you don't need to use it. A = randn(500); timeit(@() eig(A)) ans = 0.0800828164545 B = A + A'; timeit...

3 years ago | 0

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Answered
How to solve 'Equation solved at initial point' with fsolve?
As is often necessary on a problem like this, it helps to look carefully at what you have. x = sym('x',[1 2]); mu_earth = 39...

3 years ago | 0

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Optimization: Capacitated Facility Location Problem
First, what is the difference between the summation over i in a sum like this: sum(f(i)*yi)) and the dot product of two ve...

3 years ago | 1

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im trying to solve a system of 4 nonlinear equations with 4 unknowns
x = sym('x',[1,4]) eq1 = x(1)+.17*x(1)-x(2)-x(3)-x(4) == 0 eq2 = (((x(3)^(1/2))*x(4))/x(2))-.465797 == 0 eq3 = 2*x(1)-2*x(2)-...

3 years ago | 0

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Another question on eliminating for loops....
Try it. If you can't see ndgrid doing it, then look harder. :) (By the way, lower case l (L) is a really bad variable name to us...

3 years ago | 0

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Answered
How to do piecewise linear approximation from x and y points?
x = [20 60 240 480 1440 2880]; y = [0.0278 0.1626 1.8126 4.006 18.2491 44.4084]; plot(x,y,'o-') You have only 6 data points...

3 years ago | 0

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Answered
How do I access an element of an array of equations
If x is symbolic, you CANNOT use it in a colon call. But in the end, you did not ask for a symbolic result, but a function of x....

3 years ago | 0

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I want to build the square wave: build a 6 subplot figure to show the time domain, and use respectively 1, 3, 5, 10, 50, 500 frequencies.How can i achieve this?
Solve a problem that is too large for you to handle by breaking it up into small enough chunks to handle. Do you know how to u...

3 years ago | 0

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How to get the numerical rank of the matrix in matlab?
To compute the numerical rank of a matrix, use rank. Surely that seems logical. And you even know about rank. Bu then you seem ...

3 years ago | 2

Answered
Function to solve an equation for a given variable
If it is symbolic problem, then it is trivial. Just assign those variables, subs them in, and use solve. WTP? If it is a numeri...

3 years ago | 0

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Answered
How to identify the infeasibility from the set of equality and inequality constraints
You have a scalar problem? But then, you have TWO equality constraints? So a solution will exist only if BOTH equalities are s...

3 years ago | 0

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I wanna make a .mat file
help save

3 years ago | 0

Answered
Problém with graph of implicit function
If you change the value of a, then the implicit function itself changes. So you MIGHT decide to use fimplicit3. But if you need...

3 years ago | 0

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