Answered
How to calculate between the elements in an array for consecutive indexes.
idx_1 = [32,33,34,35,36,37,38,39,40]; % 1 set of consecutive numbers idx_2 = [32,33,35,36,37,38,40,41,42]; % 3 sets of consec...

26 days ago | 1

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Answered
Can Ridge Regression solve my problem?
Don't buy a toolbox, if your only reason is to hope to use it to solve a problem where you don't fully understand how or why you...

27 days ago | 0

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Answered
How do I declare a for loop with a given number of elements?
I'll only have a loop 5 elements long, as I'm feeling tired right now. :) jvals = linspace(0,0.03,5); for j = jvals disp(j)...

1 month ago | 1

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Answered
How to make a function that calculates many coefficients (>100) and reclaim them on many functions without having to return all these values?
Return a single struct that contains all of these variables as fields.

1 month ago | 1

Answered
How to fit data to the partial differential equation for 1-D diffusion?
Ok. I had some time to look at your surface more closely, It does not fit that PDE. It cannot do so. Now that I have your data.....

1 month ago | 0

Answered
How can I introduce constraints to the nature of solutions provided by a boundary value problem solver such as bvp4c or bvp5c?
The simple fix that treats the problem in a way that is arguably correct, is to NOT work directly in terms of concentration! Tha...

1 month ago | 0

Answered
Find the max of a vector recursive
This is a godawful problem to solve using recursive coding. Why? Suppose your vector has a million elements in it. Then this cod...

1 month ago | 0

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Answered
How to fix this error “Index exceeds the number of array elements (57)” while using minboundquad function
That code was written so long ago, I forgot I ever wrote it. But also, it was written in the days when the convex hull and trian...

1 month ago | 0

Answered
matrix calculation for matrix
Simple. One line. No for loop. Nothing hard. B = A(10:10:end,:);

1 month ago | 1

Answered
Why this function infinity loop
Because if your powers grow larger than 2^53-1 (i.e., flintmax), the number is no longer expressable exactly as an integer. All ...

1 month ago | 0

Answered
why ga does not respect upper bounds ?
Um, ub = [40 1e6 1e6 1e6 1e4 1e4 9000]; numel(ub) I can count, but I let MATLAB do it for me. As you should see, you posed o...

1 month ago | 1

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Answered
i which library can i find those two functions (h-plane and e-plane) ?
There is NO such library, because those are not legal function names in MATLAB. A dash is not legal in a name, in a function OR ...

1 month ago | 0

Answered
How to neatly or properly display the answers for simultaneous equations?
You may want to learn how to use the symbolic toolbox, which can display answers in a form you may want. A = [2 3 5; 3 4 7; 1 1...

1 month ago | 0

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Solved


Divisible by 2
This is the first problem in a set of "divisible by x" problems. You will be provided a number as a string and the function you ...

1 month ago

Answered
First order derivative using Curve Fitter (smoothing spline fit)
For example, we might try using the same fit, on some data where I know the answer. x = rand(100,1)*2*pi; y = sin(x) + randn(s...

1 month ago | 0

Answered
csv to .mat file
help csvread help save Perhaps you need to do the Onramp MATLAB tutorial?

1 month ago | 1

Answered
Optimize function wich only admits scalar input
FIRST, NEVER return a variable that has the same name as your function. That is a dangerously, recursively incestuous operation ...

1 month ago | 0

Answered
How to tell solver that symbols are matrices
A = sym('a',[2,2]) As you can see, A is a 2x2 matrix. B = rand(2,2); X = rand(2,2); Asol = solve(A*X == B,A) So now, for ...

1 month ago | 0

Answered
How to simplify this symbolic equation - nominator and denominator manipulation
I never did understand why people worry about making a symbolic tool give a result in a mathematically identical form, that happ...

2 months ago | 0

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Answered
Estimate area inside point cloud
As long as the curve is a sequence of points defining the perimeter and they are distinct, you can just compute the area using a...

2 months ago | 1

Answered
Graphing a polyfit function
DON'T USE A HIGH ORDER POLYNOMIAL! DON'T USE A HIGH ORDER POLYNOMIAL! DON'T USE A HIGH ORDER POLYNOMIAL! Do I need to say it ...

2 months ago | 0

Answered
natural cubic spline interpolation matlab
PLEASE DO NOT SEND ME E-MAIL ASKING FOR HELP. I ask people not to do this. (Note that for those people who might decide to do so...

2 months ago | 0

Answered
How can I show only the data from variable?
Use semi-colons at the end of those lines where you do not want to see all the crapola dumped to the command window.

2 months ago | 0

Answered
New Variables & Name in loop
Don't do it. https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval...

2 months ago | 1

Answered
How to select last digit of numbers and put it into a matrix?
Well, since you did write a fair amount of code, homework or not is irrelevant. There are some issues with your code however. ...

2 months ago | 0

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Answered
Real solutions to polynomials
When you use solve, remember that first of all, it will be impossible to find algebraic solutions to a general polynomial of deg...

2 months ago | 0

Answered
Why in a function an output argument isn't saved to workspace?
Suppose you use ANY MATLAB function? How does it work? For example... x = 1:5; Suppose you want to compute the mean of that ve...

2 months ago | 0

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Answered
Hilbert Matrix in least squares polynomial regression
Is A really a hilbert matrix? LOOK CAREFULLY AT WHAT YOU WRITE!!!!!!!!! In fact, A is not even a valid 3x3 matrix. If you fail ...

2 months ago | 1

Answered
Find a value in a matrix
help max Look at the SECOND argument returned from max.

2 months ago | 0

Answered
How to find solution using VPASOLVE
You have 2 variables, with 4 equations. vpasolve is NOT a tool that attmepts to solve a problem APPROXIMATELY. You cannot use vp...

2 months ago | 0

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