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contour for scatter data
Let me give an example of how to use a tricontouring tool for scattered data. x = rand(100,1); y = rand(100,1); zfun = @(x,...

3 years ago | 0

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Unable to use 'fit' function from Curve Fitting Toolbox
Is fit giving you fits? First, check that MATLAB thinks the curvefitting toolbox is installed, and that you have a license for ...

3 years ago | 0

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Generating a distribution of points relative to closed surface (alphshape)
Ok. I''ll offer a couple of solutions. Recognize that nothing will be perfect, since these are ad hoc solutions, and an alpha sh...

3 years ago | 0

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help me fix the Error
which distance_to_earthcos -all This function is not a MATLAB function. It is not found in any toolbox either. For that matter,...

3 years ago | 0

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Problem with derivative function
What you don't seem to appreciate is that in the eyes of the symbolic toolbox, something like 2^(-1/2) Is a numerical result. So...

3 years ago | 0

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Answered
Planes and vectors in 3d
Are these vectors with a tail at (0,0,0)? If so, then they must cross the plane, as long as the z-component is not zero. Or are ...

3 years ago | 0

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How to fit multiple gaussian in a curve ?
Easy enough. You NEED good starting values though. Crappy starting values --> crappy results. load dsp.mat plot(f,pxx) grid o...

3 years ago | 0

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replace the values by nearest mean of the matrix
Using my inpaint_nans.... y = randi(10,[7,7]) - 2 y = 0 5 0 8 1 0 2 6 5 7 -1 ...

3 years ago | 0

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Going back to unvisited node through visited node by minimum weight of edge
Why are you not using the existing graph tools to solve graph problems? It is never a good idea to write your own code to solve ...

3 years ago | 0

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my objective function should return less than 10^-6.
First, suppose your car had a problem. Would you take a picture of your car and send it to your local auto mechanic? Would they ...

3 years ago | 0

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plot a matrix in 3D
DID YOU TRY IT? Why not? So, given some arbitrary complex matrix, how do you compute the magnitude? ABS does that. How you you ...

3 years ago | 0

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Trapezoidal numerical integration of f(y) = ( 1 / x(y) ) dy
You are confusing yourself here. Probably because you have created this variable x that has gotten you confused. But let me give...

3 years ago | 1

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lsqnonlin providing very poor model fits
You have not posted the data, so it is impossible to test your code. Regardless, there are several common reasons why a solver ...

3 years ago | 0

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What is the purpose of zero function?
Consider these two codes: tic x = []; for i = 1:100000 x = [x,i]; end toc clear x tic x = zeros(1,100000); for i...

3 years ago | 1

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While loop that stops if certain number is inserted
You should read the help for while. What you wrote was not even close to valid MATLAB syntax. Look at the examples found in the ...

3 years ago | 0

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multiplying row vector by a scalar
I think @Kay needs an example. A = ones(4,3) B = 1:3; A(3,:) = A(3,:).*B

3 years ago | 0

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Doubt regarding angles of tan inverse
atan2 has nothing to do with it. At least not based on anything you said. The difference between angles can exceed the range yo...

3 years ago | 0

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Bessel Function Calculation in Matlab
Several common problems in this, regardless of whether you got the factiorial/gamma problem solved. You want to use a series so...

3 years ago | 1

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somebody help me please! I've gone over the irritation of approx_sqrt and the only way I've got each value of the function while using a calculator it was if I used y=2
The site seems to want an answer to your question, and we just answered you in the comments. Oh well. But seriously, your solut...

3 years ago | 0

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How to remove noise (unwanted data)
Finding and removing what I might call singleton outlier's while leaving in place small amounts of noise can be a difficult task...

3 years ago | 2

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How to check the proportionaly of columns of a complex rectagular matrix?
Checking if two vectors (in your case, just columns of a matrix) are proportional is pretty easy, as well as then computing the ...

3 years ago | 1

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error with function ode45
You need to tell the ODEsolver FROM where, TO where will it integrate? So will the integration be, perhaps FROM 0 to 0.5? All y...

3 years ago | 0

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save loop data with non integer steps
acvalues = 0.01:0.01:1; detectorsignal=zeros(size(acvalues)); for ind = 1:numel(acvalues) absorbing_coeff = acvalues(in...

3 years ago | 0

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Write a function quadraticSolver that takes one 3-element array input and returns two outputs (root condition and root values). Use an if-elseif-else structure in your code.
The error message apparently tells you your array is composed of uint8 numbers. How do you convert a variable of integer type,...

3 years ago | 1

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Creating an array of partial sums of certain array
For example, consider the vector (I've used syms here, so you can see that it works, and generate the correct terms. Had a been ...

3 years ago | 2

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Numeric approximation of infinite sum
Um, first, legendreP will return either 1 or -1, depending on the value of n. So effectively, we can replace that call to Legend...

3 years ago | 0

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how to solve two equations
Note that the two equations are fully uncoupled. This means U20 appeared only in one equation. It has absolutely no impact on th...

3 years ago | 0

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How to find a root and know if fsolve or fzero is better?
IF you have a function of more than one variable, you ALWAYS need to use fsolve. fzero would not apply. IF you have a function ...

3 years ago | 2

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Collection of Squares RGB Matrix
Really pretty simple. You have a list of colors. 24 of them, apparently. The thing is, all the examples you would see will hav...

3 years ago | 0

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Finding Limits of Two variables
As stated in my comment to @Sulaymon Eshkabilov, the one variable at a time solution is rarely correct. Again, I'll give my exam...

3 years ago | 0