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How to get the combination "nCk", if either n or k is a variable.
if x(3) is NOT an integer, then what do you expect? If x(3) is NOT at least as large as d, then what do you expect? In either...

3 years ago | 0

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Fitting 3D data into a function
The curve fitting toolbox does not fit models with more than 2 independent variables. You can use my polyfitn tool, found on th...

3 years ago | 1

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Answered
How to solve exponential variables
The problem is, you have been trying to SOLVE them. More approproately, you want to use a tool that will FIT your model to the...

3 years ago | 0

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Laguerre polynomials of large degree.
If you are using double precision, then OF COURSE high order polynomials of any form in MATLAB should not be trusted!!!! At leas...

3 years ago | 1

Answered
Shifting an array without circshift
Nobody can know what you did wrong. circshift DOES work. I'm not even sure what you would have done that would cause an error. T...

3 years ago | 1

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trying to solve two non-linear simultaneous equations but I had an error figuring out my two unknowns (X(1) &x(2)) , can anyone pls help?
ARGH. Why would you post a picture of your code? And at that, only a partial picture? Even if I try to show why your code fails,...

3 years ago | 0

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How to determine concavity point?
You give no data, so I'll need to make some up for an example. x = linspace(-30,30,500); y = cumsum((atan(x - 10)/2 + 1)); pl...

3 years ago | 0

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Answered
What to be chosen c so that all elements of matrix B will be a round number. B=A.c; where A is the matrix of non integers.
You want to find some scalar value c, such that for some given vector A, you want the product A*c = B to be purely a vecto...

3 years ago | 2

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How can i simulate a generic poisson process?
Not sure how you built the vector. Is it a Poisson process? Could be. :) As I recall, if you have exponential inter-rarrival tim...

3 years ago | 1

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Answered
mvncdf gives different results before and after the variable is standardised
No answer yet? The distinction as I see it is a subtle one. And had your covariance matrix been a diagonal one, then I expect it...

3 years ago | 0

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Answered
Delete a plane (2d) within a 3d matrix
Sometimes it is simpler to take what you want, than it is to delete what you don't want. Here is a matrix: A = rand(256,256,256...

3 years ago | 0

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Answered
How do I find the (right) null space of a matrix?
Easy. A = rand(5,2)*rand(2,3) A has rank 2. Arnull = null(A) A*Arnull It kills A, which is what the right nullspace would d...

3 years ago | 0

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asking for a polynomial expression in an input
Can you type in a polynomial? Why not? You type it anyway. Just use input, which can return the result as a string. Or, use a di...

3 years ago | 0

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How do i keep track of eigenvalue on pzmap for a pariticular system matrix A containing a variable D?
You can use the tool I wrote, eigenshuffle. It sorts the eigenvalues in as consistent an order as possible, by assuming the corr...

3 years ago | 0

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Error using "*" in my equation, assumes I am trying to do matrix multiplication.
Even though you are not using matrices, does not mean that linear algebra could not be intended. MATLAB does not know what you a...

3 years ago | 0

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Finding the turning points
If all you will use are the 100 coarsely sampled points you are plotting, then min and max will do what you want. Look at the se...

3 years ago | 0

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surface area of 3D surface
Would our doing your exam for you really help you? Seriously? If you need help that badly, then you should have been studying mo...

3 years ago | 0

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How do I place a point anywhere along x axis (with range 100m) in a plot?
Highly confusing. Do you want to plot a single point? What y value? Maybe you want to do this? k = 53; plot(k,0,'ro') % A sing...

3 years ago | 0

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Cantor function in matlab
To be honest, I'd probably be lazy, and just use the simple algorithm found in wikipedia. https://en.wikipedia.org/wiki/Cantor_...

3 years ago | 1

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Wrong answer for ODE
As is so often the case, a DIFFERENT answer is not always a WRONG answer. It may just look different. But different is not alway...

3 years ago | 0

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function of two uniformly random variables
I think you need to learn how to write a function. You also seriously need to learn about the dotted operators. What you wrote f...

3 years ago | 0

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Create a series of variables with names that include numbers
https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval The funny th...

3 years ago | 0

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Answered
Can we trace the qualification of person using matlab?
Huh? If I had to guess, you want to see if an algorithm exists to know the degree of skill a person has as a MATLAB coder, based...

3 years ago | 2

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Non linear fit of y=f[x] where y can have multiple values for a single value of x
No. You cannot use polyfitn. It is designed to solve a SINGLE valued problem, but with 1 or more independent variables. You cann...

3 years ago | 0

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How to give a condition based on the following situation
Why does it matter? Just pick one of them. Or choose randomly between them. Or on odd numbered days, choose the first, on even n...

3 years ago | 0

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Answered
How to replace the non zero values of a matrix with another value?
A(A ~= 0) == 0.1; One line of code. That applies to ANY release of MATLAB. As far back as I have been using MATLAB, so only bac...

3 years ago | 0

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Answered
how to script rectangular function in MATLAB
Define what a rect function is, since I find it difficult to read your mind. I'll guess it might be a unit rectangular pulse of ...

3 years ago | 0

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How can I 3d interpolate a function f: R^3 --> R^3 ?
This is a common problem, at least in the world of color modeling as I worked for many years. You will want to build 3 interpola...

3 years ago | 0

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Answered
Positive definite and LQR
R = 1; C = [0 0 1]; Q1 = 25*C'*C; N = zeros(3,1); matrix = [Q1 N;N' R]; The matrix Q1 has rank 1. You formed it from a vect...

3 years ago | 1

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How do I simplify polynomial coefficients with symbolic variables to the least possible forms?
The simplest form in your eyes is not always what a computer sees as the simplest form. It may require factoring the polynomial ...

3 years ago | 0