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f(x)=0 matlab code for fixed point
You have been given a function f(x), and you now want to write a fixed point solver that will first, automatically create g(x) b...

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How to prevent MATLAB from using parallel calculations for QR factorization?
https://www.mathworks.com/matlabcentral/answers/103133-how-can-i-limit-the-number-of-computational-threads-used-by-matlab-in-mat...

más de 3 años hace | 0

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How to make a linear regression coefficient algorithm
Why do you want to write your own linear regression code? This is generally a bad idea. Never write code to do what a profession...

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Populating off-diagonal blocks of diagonal matrix and making it sparse
There are several mistakes you seem to be making here, surprising if you have been reading a lot about sparse matrices lately. ...

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lsqnonlin initial conditions (transcendental equation)
This does not make sense. x_data = importdata("x_data.mat"); x_data Your x_data vector is identically constant values. uniqu...

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Philosophical question: How to get a vector from the output of solve? Why isn't it a vector already?
I tried it with a vector, wondering if that might make solve work more easily. And it does work. A = magic(3); X = sym('X',[3,...

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Why does fmincon using the sqp algorithm need a full matrix to specify linear constraints?
This sounds like a good excuse for a feature request to me. However, my gut tells me there is a technical reason in the algorith...

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How to build a function fun that takes as input the matrix A and as output provides the matrix B which is produced out of A in the following ways.
Possibly homework. (I never trust simple problems like this, where the goal is simply to move thigns around in a matrix. They ar...

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How to get numerical values of nonlinear implicit function?
This is far easier then you may think. Um, trivially so. Just solve for t, as a function of y. Pencil and paper suffice for that...

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How to write the equation in matlab I= A A* T² exp (qob/kT) exp (q(V - Rs I /kT)) (exp (-1/n) ? Why is the curve not shown in the drawing?
n=5.2; %Ideality factor A =8.16; %Richardson constant q = 1.602e-19; % electron charge K = 1.380e-23; %Boltzmann constant...

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How to find a point on this plot?
X = [-205078000000000.00 -190430000000000.00 -175781000000000.00 -156250000000000.00 -141602000000000.00 -117188000000000.0...

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How to find a coordinate of a circle with a given equation tangent to the circle
You (apparently) want to find the circle of radius 4, with center at (0,y0), where y0 is unknown, that is tangent to the curve. ...

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Fsolve can't solve this simple nonlinear equation
c = 3; eq = @(z) c - (z.^3/3 - z); [xsol,fval,exitflag] = fsolve(eq,0) fplot(eq,'b') hold on plot(xsol,fval,'rs') grid o...

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Unrecognized function or variable 'imnoise2'.
which imnoise2 -all We cannot help you to use a function that does not exist as part of MATLAB, Possibly, the code you are usi...

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how to construct this in matlab? can anyone explain step by step?
One line of code. The explanation is right there. If you want more depth, the read the doc for jacobian. The good thing is, MATL...

más de 3 años hace | 0

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Colon syntax for creating a sequence of numbers that skips a given number?
You can't, at least not directly. But it is quite simple. For example: setdiff(1:10,3) % 1:10, missing 3 There are probably ot...

más de 3 años hace | 0

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normalizing a normal distribution
You don't show the actual mean and standard deviation used for that plot, so I'll make a wild guess. mu = 0.55; S = 0.18; fpl...

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How can I calculate the index of when the sequence starts to repeat?
Why is it clear? It is not certain that it repeats at the points you have indicated. For example, what is the repeating sequenc...

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Caesar's cypher working incorrectly
Question: What do the functions upper, and islower do in MATLAB? help upper So upper converts a string to entirely uppercase. ...

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2nd Order ODE Euler method not producing expected results
That is not uncommon with Euler. It can be an unstable method. At each step, a small amount of error gets added in. Eventually,...

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Is possible to integrate numerical data using quadrature method?
TRAPZ already is a quadrature method!!!!! TRAPZ is an implementation of trapezoidal integration, i.e., QUADRATURE. Where do you...

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factorization of Multivariate polynomial
This is a bit of a hack of course, since factor seemingly should have solved the problem with the appropriate setting. The probl...

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I'd like to skip the file that's not there and bring it up!
mat rap? Is that some godawful new song I've never heard before? ;-) That just seems, well, raprehensible to me. You don't want...

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Most efficient way of looking up values in an array.
It hurts my head to see this ordering: (y1, x2, y2 and x1). Sigh. Why? Whatever floats your boat, I guess. I would not be usin...

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matlab some polyfit problem
It is NOT abnormal. It is perfectly normal, and, in fact, perfectly correct. And the scaling is actually a valuable tool, when n...

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how to use big prime in meshgrid
Pick some random integer X, less than p. You will need to use some tool capable of working with large integers, greater than the...

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Find column number for every row in matrix
Simple. One line. A = randi([-5,5],[10,7]) [~,col] = max(A > 0,[],2) Why does it work? A > 0 returns an array that is true (1...

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Does the eig() function return normalize eigen vector (unit length)?
Yes. V is normalized to have unit 2-norm, at least in common cases. Surely you could have checked that? A = magic(5); [V,D] = ...

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How to change the independent variable?
plot(x,f)

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Solving differential equation in series general solution
I just showed you how to solve the problem, for two unknown constants. Of course, your question here involves an initial value a...

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