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Why does the SUBS command is not working with numbers?
Odds are, you don't understand floating point numbers. When you see this value in MATLAB: 0.8909, generally that is not the true...

más de 3 años hace | 0

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I am trying to run a simulation 1000 times and generate a matrix 600x1000. My simulation creates a 1x600 vector
Easy. Create a matrix, of size 1000x600. results = zeros(1000,600); Now, in your loop, assign the vector to one column of that...

más de 3 años hace | 0

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Problem is unbounded with linprong
Unbounded means what it sounds like. We can move in SOME direction, making the objective as small as we wish. I.e., as close to ...

más de 3 años hace | 1

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fmincon optimizes a non-differentiable function, How?
No. It does NOT throw an error, though maybe sometimes a warning. It may often even survive as it did here. fmincon does not aut...

más de 3 años hace | 2

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Solving an Equation in Matlab
Sounds like you got an answer that worked, but let me expand. You have a function: f = @(t)16.68*t - (16.68*(1-(exp(-0.21*t)))/...

más de 3 años hace | 0

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Not sure why I keep getting this error message?
Parens need to be balanced. This is true in pretty much any language I can think of, but I am sure there are exceptions. Square ...

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Determine in an interpolation the contribution of each node nearby
The most significant nodes? The nearest neighbors to a given point. Beyond that, the significance will die off, probably exponen...

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Efficient multiplication by large structured matrix of ones and zeros
Are there more efficient ways to do this? Well, perhaps, arguably so. Why you want to do it, is I supose your problem. THINK ab...

más de 3 años hace | 1

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Generate normal distribution with LGC random issue
After looking at your code in my other answer, the problem clearly reduces to your RNG. Is that even a valid linear congruential...

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Generate normal distribution with LGC random issue
I might check that you REALLY are using the same expressions for both of the transformations to Normal. Have you done so? (STRON...

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Does anyone have the source code of the regression decision tree in MATLAB?
You already have the source code. For example, just do this in MATLAB: type fitrtree The code is written in MATLAB itself, so ...

más de 3 años hace | 0

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How to find mutually orthogonal vectors with unknown?
In theory, Gram-Schmidt would be sufficient. https://en.wikipedia.org/wiki/Gram–Schmidt_process In practice, if the number of ...

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Random numbers generation problem
Just compute the set of all numbers in the interval you care about that are NOT divisible by those small primes. Technically, th...

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Match two columns with names/strings that are not 100% identical
Searching for degree of similarity is not a completely trivial task. In a sense, you want to describe the distance between two "...

más de 3 años hace | 0

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How can I calculate 5 lions in a row?
I'm so used to coins having heads or tails though. ;-) I guess I can deal with lions. Anyway, your code gets at the question at...

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fminsearch for a function f(x,y) = x^4 -3xy+2y^2
This MUST be a homework question. But by now, you have multiple answers, that I think don't explain in any depth what you asked....

más de 3 años hace | 0

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Tic toc without output
First, using tic and toc are bad ways to compute the time to do something. Why? They compute only ellapsed time, and even then, ...

más de 3 años hace | 0

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How can I nest a function in a function?
See that I wrote hilbert differently. Feel free to use doubly nested loops there. But why? As well, NEVER name a function the s...

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I want to find 4 consecutive number which is present in array.
Easy. What property does a sequence of 4 consecutive numbers have? I suppose there may be many such properties, for example, the...

más de 3 años hace | 1

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How to I plot a graph that reflects the percentage of change of an equation when an varable changes
Your question is not one with an always easy answer. Effectively, you are asking for a sensitivity analysis. The basic answer wo...

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how to split a string (char value) with zero in front of it but showing the value in the matrix?
MATLAB does NOT allow you to store or represent an integer as the number 0100. If you try, you will get 100. The leading zero go...

más de 3 años hace | 0

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different result of PCA function and my PCA
Congratulations! You are the 1 millionth person to have this happen, and then be confused. Your reward is a free trip to Newark,...

más de 3 años hace | 0

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Using GA to optimize a fuction of a fuction that is dependent on the
I don't see the problem. If you know x1,x2,x3, then you can compute b. You tell us that. Yes, it is a nonlinear equation. So wh...

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Why do I get unrecognized function for a built in function?
which psdg -all As you can see, psdg does not exist as a MATLAB function, in any toolbox we can search, and they are all pretty...

más de 3 años hace | 0

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i want to solve a 297 linear equations with 298 unknown variables
There are some serious problems in this. I won't even get into the literal impossibility of what you have done, to write down an...

más de 3 años hace | 1

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Slope of line intersecting with y axis
What has this to do with MATLAB? The axis has NOTHING to do with the slope!!!! The slope in both cases is (y2 - y1)/(x2 - x1)....

casi 4 años hace | 0

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A random symmetric matrix whose row and column sum is equal to one and diagonal is zero
If it is symmetric, AND the row sums are 1, then so are the column sums. But if you are not picky about the distribution of th...

casi 4 años hace | 1

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Is there a reason why Triangular is not an option in fitdist?
Is there a GOOD reason why not? Probably not, but then I don't expect a triangular distribution is in high demand either. Could ...

casi 4 años hace | 0

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Complex number division of matrix over a vector
You SAID divide. You did not say you were solving a linear system of equations, as that is what backslash does. Regardless, I'll...

casi 4 años hace | 2

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Solving Trigonometric Function Equations with Time varying Parameters by MATLAB
Way better than using fsolve is to compute the analytical solution. That is, if t is the time varying parameter, then we have s...

casi 4 años hace | 0