Answered
Convex bivariate B-spline by construction (PSD Hessian)?
Even without thinking about it, I'm pretty sure the answer is no. Things get nasty when you move beyond one dimension, and 2d is...

5 months ago | 0

Answered
An easy way to input song chords into a structure of MATLAB
AVOID the function input. It only hurts your code, preventing you from growing. Learn to use other solutions for data input. One...

6 months ago | 2

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Answered
I'm using a 2020 Mac Mini. Will R2017a run on this computer if I upgrade to MacOS Tahoe?
No. 2017a will NOT run on Tahoe. Just read the docs to tell you which OS versions can run R2017a. https://www.mathworks.com/co...

6 months ago | 0

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Answered
Are iterative methods always better than direct methods for solving large linear systems?
The use case which some may miss here, is the very large array, where a dense solver fails due to memory, but even the sparse on...

6 months ago | 2

Answered
solving a system of linear equations where A is a 40*40 sparse matrix
I'd suggest that sparse is almost meaningless when the matrix is only 40x40. At that point, the dense solvers are still extremel...

6 months ago | 3

Answered
Putting spaces between elements of a string/
A = ['011001110000';'101111000000';'110100011000';'011010001100';'010101000110';'110010100010';... '100001010011';'10100010...

6 months ago | 2

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Answered
How to download the certificate
I'm sorry, but no, we cannot resolve your problem. Answers is not customer support. Answers is a volunteer forum, generally comp...

7 months ago | 0

Submitted

HPF - a big decimal class
High precision floating point arithmetic, a new class written in MATLAB

7 months ago | 6 downloads |

4.9 / 5

Answered
Defining inequality constraint A*x <= b for genetic algorithm
As I said in my comment, you cannot set up a linear system of inequalities to constrain that curved path from self intersections...

7 months ago | 0

Answered
i want to add cplex and yalmip on my mac how ?
YALMIP is an external toolbox, written in MATLAB, so it could in theory be used by any MATLAB installation. However, it is proba...

7 months ago | 0

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Answered
flag a question as answered.
While DGM gave a very complete answer, worthy of acceptance in my eyes, I think, from a look at one of the other questions from ...

7 months ago | 1

Answered
Finite elements model using STABIL
I cannot test your code, as I lack the tools you are using. Regardless, IF you tell us the solve yields NaNs, then there are onl...

7 months ago | 0

Answered
Using logic to select specific values in a matrix
Well, you are doomed to failure, as long as you don't use the right variable names as you created them! A = [1, 0.1234 1,...

7 months ago | 0

Answered
In how many functions using the global variable, can a global variable be declared?
There is no limit on how many functions can use a global variable. At the same time, I will plead, for your own sanity, to recon...

8 months ago | 1

Answered
How do I plot a graph with the grid for trig functions with 0 ≤ x ≤ 2π
@Sean syms x f = cos(x) dfdx = diff(f) help fplot

8 months ago | 0

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Answered
Should I need keep in my PC previous versions of Matlab?
Some of us keep older releases, just to answer a question about an older release, testing out code in the old release. I do ten...

8 months ago | 0

Answered
Unable to fetch more decimal points for values stored in sldd
You need to learn about the format command. All of the digits are still there, they were just not reported. I'll add a few digit...

8 months ago | 1

Answered
The symbol "1" is not a scalar in integral3
If ALL you want to do is compute a volume, especially of such a simple domain, there are better ways to do so. If the domain is ...

8 months ago | 1

Answered
How does the svd function determine or fix the phase of singular vectors?
First, signs are to some extent arbitrary. That is, for EIG, you can multiply an eigenvector by -1, and it is still an eigenvect...

9 months ago | 1

Answered
Obtaining the differential equations from graphical representation of the problem
Can you show that a set of equations is a valid representation of some data, merely by comparing them to a curve you find in som...

9 months ago | 0

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Answered
Will the old-style class definitions be supported in future version of Matlab?
One thing you cannot realistically ask on Answers (if you expect a fully valid answer) is what decisions about MATLAB will be ma...

9 months ago | 1

Answered
Modelling a system of differential equations with recurrences in matlab
This is known as a delay differential equation. You will find any solvers for them starting with the letters dde. help dde23 Y...

9 months ago | 0

Discussion

OH NO! isprime is missing? (Just kidding)
What if you had no isprime utility to rely on in MATLAB? How would you identify a number as prime? An easy answer might be some...

9 months ago | 0

Answered
Iterating the eigenvalue function (eig) produces patterns --- is this a well known result?
I'd have a hard time believing this is well known. @Christine Tobler would be the one to know though, and she agrees. It just f...

9 months ago | 0

Answered
Question on the format of 2D curve fit equations in plot
Scientific notation. 6.588e + 06x^2 == 6.588*10^6 * x^2 Note that it is easier and faster to write, and even a bit easier to ...

9 months ago | 0

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Discussion

Approximating a floating point number with a finite representation in decimal form
I saw an interesting problem on a reddit math forum today. The question was to find a number (x) as close as possible to r=3.6, ...

9 months ago | 0

Answered
How do I find the average of a vector of units by using a for loop?
When you create a variable name, NEVER, NEVER, NEVER use a name that is an existing and useful function name. (Well, it might be...

9 months ago | 0

Answered
how to find orthonormal vector with condition?
Confusing question. Which probably means I'm misunderstanding your goal here, or that I am myself confused, which is not uncommo...

9 months ago | 0

Answered
Closed contour with least square differences to dataset
This can be quite difficult if you have some completely arbitrary form. But you tell us this is a simple closed form. And as lon...

10 months ago | 0

Answered
MATLAB R2018a needed
We cannot give you a copy of MATLAB. Answers is not customer support anyway. And even they don't just give out copies for anyone...

10 months ago | 0