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Non-square matrix inverse
You CANNOT do so. That is, you cannot learn the original values. You cannot go backwards. A simple example is: Choose any two n...

2年以上前 | 0

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How do i make an exponential curve graph from a vector?
You can't have a polynomial that will fit that curve shape. They simply do not have that characteristic form. So using polyfit (...

2年以上前 | 0

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How do I get normal numerical answers using solve or vpasolve?
vpa will turn those products involving pi into more normal looking numbers. For example... x = 17*sym(pi) So x has pi in it. ...

2年以上前 | 0

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Why these two path strings are different? (manual string vs. pwd + fullfile)
LOOK AT THE STRINGS. They are just strings after all. What is different between them? pwd = "C:\Users\username\certain_path"; ...

2年以上前 | 0

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symbolic solving system of non-linear equations
Solve does not apply to over-determined problems. But it does not know there may be some exact solution that solves the entire s...

2年以上前 | 1

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Optimization problem using fminunc
Apparently, your objective function is not well defined at the initial point. I know, this is a wild guess, but that is exactly ...

2年以上前 | 1

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Interpolation of inaccurate datapoints
Interpolation does NOT allow the data to change. Essentially, that is what interpolation means. You need to do SMOOTHING, not in...

2年以上前 | 1

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Change variable name across code lines
Use find and replace. It will search for the next occurence of a. Then you click on either replace, or to ignore that occurenc...

2年以上前 | 0

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How can I find the determinant and transpose of a 13*13 matrix without writing all the numbers one by one?
You have many almost random looking numbers. So without knowing how they were generate, it is impossible to do better than stuff...

2年以上前 | 0

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i'd like to ask is there any function to find asymptotes of an equation y = f(x) that satisfies x = x(t) and y = y(t). I'm new to matlab.
Its an interesting question of mathematics, maybe not really a question about MATLAB in my eyes, because until you know how to s...

2年以上前 | 0

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how to suggest a name to save
Asking a computer to suggest a name is impossible. It cannot know what name might be appropriate, and more importantly, what you...

2年以上前 | 0

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solve function answer is a 2x1 matrix . how to assign it directly to 2 variables ?
For example, I'll compute the mean of an array, which here will generate a vector of length 2. A = rand(10,2); mean(A,1) Defi...

2年以上前 | 0

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How to use substitution on function handle?
ODE45 CANNOT use symbolic parameters. PERIOD. No matter how you try to trick things, you cannot pass a symbolic parameter (here ...

2年以上前 | 0

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Coefficents of piecewise polynomial in matlab
Do you understand the result will not be some simple polynomial like you are used to seeing? plot([1 0 -1 0 1],[0 1 0 -1 0...

2年以上前 | 0

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need source code for voronoi
Sorry. MathWorks does not give out source code for compiled functions. So unless you are employed there, you don't get the sourc...

2年以上前 | 0

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Find zeropoints with interpolation
Almost trivial. LEARN TO USE MATLAB! I'll start with a long vector. x = linspace(0,20,1e7)'; y = cos(x); Yes, we know where t...

2年以上前 | 1

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I need help with cubic splines containing pre existing conditions
Easy enough. And ... also somewhat useless, because this is not how you will have been asked to solve the problem. But it might ...

2年以上前 | 0

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I have a problem with the convergence of fsolve ?
Solve simpler problems. Choose even better starting values. Yes, you think yours are reasonable, but they are not as good as yo...

2年以上前 | 3

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Indexing with min and numel
vector1 = 1:5 vector2 = 2:7 N = max(numel(vector1), numel(vector2)) I'm not sure what you mean by indexing. But the above see...

2年以上前 | 1

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Dsolve gives extra term
Why do you care? Note that C1 is completely arbirtrary! C1 is an unknown constant! So you can trivially add or subtract any c...

2年以上前 | 3

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How to find the best combinations of calculation of function with 36 input constants, each constant is possible to calculate in 3 ways
Brute force is NEVER going to be a good idea. Instead, if you have the global optimization toolbox... help ga

2年以上前 | 0

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which method is usied to solve the Determinant in Matlab
JUST READ THE HELP! (Actually, doc det.) In there, you will see this statement: det computes the determinant from the triangula...

2年以上前 | 3

Discussion

Should the AI apply to all questions posted on Answers?
I saw this post on Answers. https://www.mathworks.com/matlabcentral/answers/2046770-explaining-a-matlab-code/?s_tid=ans_lp_feed...

2年以上前 | 3

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Alternate function of gdivide
help gdivide As you should see, gdivide provides a great deal of very general functionality. And that means it will also includ...

2年以上前 | 0

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how create cell 1:10 vertical
There are always many ways to solve a problem. An easy way to create the cell array directly is to do this: C1 = {1;2;3;4;5;6;7...

2年以上前 | 0

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How can I fill the area under a curve with different colors?
Simple. Just use fill (or patch) to fill THREE patches, each with the desired color. How can it be any simpler? Or, you could ...

2年以上前 | 2

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How to use MATLAB to complete the rank of a matrix?
Trivial. Replace the offending columns with vectors of random numbers. DONE. With probability 1, the result will be full rank. ...

2年以上前 | 0

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how to solve a simplified 2D trajectory problem with defined points and derivatives
I think what you are missing is the time required to perform this movement between points. You have specified the start locati...

2年以上前 | 1

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How to count the occurrence of numbers in certain value range (show 0 if no occurrence)
The simple answer is you want to use the wrong tool. Yes, it looks like you want to use groupcounts. But you don't. P=[1 1 3 4 ...

2年以上前 | 0

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How to extrapolate the first 5 points
load points.mat x = points(:,1); y = points(:,2); i1 = 1:5; i2 = 6:336; plot(x(i1),y(i1),'ro',x(i2),y(i2),'g.') I have no ...

2年以上前 | 0