Discussion

Using graphs to learn about Kaprekar constant(s)
D.R. Kaprekar was a self taught recreational mathematician, perhaps known mostly for some numbers that bear his name. Today, I...

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Solve more complex problems in matlab
Can you just throw it at solve, and hope solve can figure out what is your question? Probably not. A tool like solve is not that...

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Solve equation with multiple variables
Let me explain SOME of the the mathematics here. First, you have 4 equations, in 4 unknowns. Typically, that means there is one...

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If I deactivate my llicense on one computer to try Matlab on my new computer, can I reactivate the old computer Matlab if the new computer Matlab does not work?
Well, yes. You can go back, even though we learned long ago that "You can't go home again", Thomas Wolfe may have fed us a littl...

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Plotting random number in a line
What is it that you want then? A plot requires TWO axes, TWO variables to be plotted, typically we might plot x versus y. My fi...

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How can I plot a hyperbola?
Just for kicks, we can do a little algebra. Start with the original form. syms x y eqn = 0.4829 == sqrt((95-x)^2-(0-y)^2)-sqrt...

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How reduce data from 3917x2 to 1868x2 without change the entire of graph?
Just take every other data point, if you just want to roughly reduce the size. But you say you want a specific length. So then y...

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I want to start a youtube channel where i develop flight control algorithms. Which matlab license do i need?
You definitely want to contact support, as only they can answer your question. I am not a lawyer. However, it seems if you are ...

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How to filter out the noisy portion of contourf plot?
One basic rule that always applies to things like this. You DON'T want to smooth contours after you have found them. You can't t...

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How to plot one curve and change color according to value
As ifs often the case, I am far too late to the party. :) But there are often many ways to solve a problem, so I like to be able...

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why does this line of code give error- disp("The density of " + element ... + "is" + density). When i press the 'enter ' key after the 3 dots and rerun, it works.
Do this instead: disp("The Density of " + element + " is " + density) What did you write? disp("The Density of " + element .....

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How to fit power-law to each column of data arranged in a table?
Why should it work? I see these lines: [fitresult, gof] = fit( xData, yData, ft, opts ); % Goodnes of the Fit R^2 result...

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To RESHAPE number of elements must not change
How do you fix it? Make sure you know what the size of your array is, before doing a reshape. This way when you do that reshape ...

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hi, find the value of x theoretically?
Do you assume that every expression you can write down has an analytical, neatly written algebraic solution? Surely not. Start ...

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Is a matrix with a condition number of 1e20 definitely more ill-conditioned than a matrix with a condition number of 1e19？
NO. There is effectively no significant difference between the two. At that point, you are into what are essentially random bit ...

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How to generate vector with non-linear spacing?
It sounds like you want a deterministic, non-random set of points. You can use the inverse gaiussian CDF to do what you want. a...

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Ordering multivariate polynomials by increasing higher order terms
The problem is, the symbolic toolbox does not use the term sequence you personally prefer. In fact, you can't control the sequen...

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I'm doing an project in matlab software and my data set having more than 1 lakh images so can you prefer any best laptop for this processing in i7
I think you do not understand. Moving from an i5 to an i7 will improve things. Multiple cores, lots of memory will be nice, even...

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Multivariate regression for constrained dependent variables
Sorry. You CANNOT insure that y1+y2 == 1, EXACTLY. At least not if there is any noise in your data. All you can do is to use it...

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Using Matlab Runge Kutta Routine
"IT WON'T GO PAST THE FIRST INCREMENT". Lol. Exactly what do you think this does in the very beginning of the loop? for count ...

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Unable to resolve the warning on ill conditioned Jacobian
A not uncommon misunderstanding about modeling. First, look carefully at your data. M = importdata('datai2j3.txt'); x = M(:,1...

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volume of set of points in 3d space with gap
Is there any way you can make the convex hull adequately represent a region that is not in fact convex? Of course not! You have...

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Problems by calculating zero points of a cubic function
Or, you can use analytical tools. syms x a f = -2*x^3 + x^2 + 0.5*x -8; % Remember to use * to multiply fa = f + a; Before y...

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How to choose a single element randomly from a vector
I've upvoted the answer by @R. Please accept it. My answer here is only to express some ideas that are really best put in a comm...

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Discussion

Using MATLAB to find a generative equation for a sequence
This stems purely from some play on my part. Suppose I asked you to work with the sequence formed as 2*n*F_n + 1, where F_n is t...

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Setting unknown constants in equation for known data
This is the classic regression problem, either linear or nonlinear, and that depends on how the parameters enter into the "model...

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Efficient management of interacting atoms based on their mutual distance
No. It is NOT true that in a set, if atom x is one of the k closest atoms to atom y, that the converse is also true, i.e., that ...

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Numerical integration of area
The region in color? The integral will be negative, or course, since depth is entirely negative. But you perform such an integr...

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Particle Swarm Optimization - What method is used to find local minimum?
Particle swarm optimization, https://en.wikipedia.org/wiki/Particle_swarm_optimization is one of many meta-heuristics used to ...

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Any ideas for making this exponential decay function match the actual data better?
(I spent so much time writing this as a comment, I might as well make it an answer.) @Image Analyst asks a valid question. I ha...

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