Answered
The support on here is horrible, does anyone have an api for the function calls? I'm tired of searching only to find examples of what I don't need.
Matlab Answers is a discussion forum, not a documentation browser. If you want to find documentation, start here, https://www.m...

12 days ago | 2

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How to use fimplicit with a symbolic function
Using matlabFunction, you can derive a non-symbolic version of your circle equation expression from the symbolic version, >> ci...

12 days ago | 0

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How can I get the elements from a matrix and use them as the coordinates in another matrix
D = C( sub2ind( size(C), W(:,1:end-1), W(:,2:end) ) ), sum(D,2)

12 days ago | 0

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Answered
A class to simulate missing arguments in function calls
The main drawback is that one must always use myfeval, which is not very readable. Yet another solution, which might address th...

12 days ago | 0

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Multiple selection of an array
You can use sepblockfun downloadable from here https://www.mathworks.com/matlabcentral/fileexchange/48089-separable-block-wise-...

12 days ago | 0

Answered
A class to simulate missing arguments in function calls
Clearly, I would have to check for each input argument to be ~isempty(), or ~isnan(), which could be another technique. However,...

15 days ago | 0

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Answered
A class to simulate missing arguments in function calls
Seems to me that you can effectively accomplish what you want by defining a trivial class with no properties or methods, classd...

15 days ago | 0

Answered
Evaluating a complicated integral in Matlab gives NaN
Your integrand has a singularity at psi = pi/2. So perhaps try, f2(i) = integral(f1, 0, pi/2*(1-eps), 'ArrayValued', true);

16 days ago | 1

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How to find "rectangular" corners?
Use pgonCorners from the File Exchange (Download). It applies to any convex polyhedron. numVertices=4; corners=pgonCorners(I...

16 days ago | 1

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How can I change the 'MaxIterations' option in matlab 'createOptimProblem('fmincon',..........)'
You need to do this, opts=optimoptions('fmincon', 'MaxFunctionEvaluations',3000); problem = createOptimProblem('fmincon','x0...

17 days ago | 1

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Answered
Inconsistency in the definition of two geometric transformation matrices (tform)
The second form is the one expected by maketform. The only difference between the two conventions is that with the first, the tr...

17 days ago | 0

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Submitted

Find vertices in image of convex polygon
Estimates the corner points of a pixelated convex polygon having a known number of vertices.

17 days ago | 9 downloads |

Answered
How can I find the coordinates of the top and bottom end plate and calculate the height?
The FEX submission pgonCorners (Download) can be used to find approximate corners for each of the vertebrae. Once you have the c...

17 days ago | 0

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Answered
How to get the maximum value of an implicit function?
I believe this method does not allow me to change the number of points in X, It does, e.g., f = fimplicit(fun,[0,40,0,9],'Mesh...

18 days ago | 0

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How to avoid looping of anonymous function?
You could make it the end-user's responsibility to enter the function in anonymous form, >> f=input('Enter anonymous function: ...

18 days ago | 0

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Fit image datapoints to curve
You would use a 2D version of an Iterative Closest Point (ICP) algorithm. This FEX contribution appears to have one: https://ww...

19 days ago | 0

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Write a script that calculates the ​​user produced polynomial. The polynomial can be input until the user decides to terminate the program.
If you have the Symbolic Math Toolbox and wish to manipulate the polynomials in symbolic form, you can use poly2sym, >> p = inp...

24 days ago | 1

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Answered
sparse and gpuArray/sparse errors very odd! (with MWE)
Ultimately, the reason is that you are creating matrices that violate various internal array size restrictions. There are differ...

24 days ago | 1

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"Index exceeds the number of array elements"
Perhaps this is what you are looking for, function [Ex, Ey, Ez] = E_field(x,y,z) R_s = 0.02; V = 0; epnaut = 8...

25 days ago | 0

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Answered
how to do violin plot in matlab
Here's my personal favorite. https://github.com/bastibe/Violinplot-Matlab

25 days ago | 0

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Answered
Unable to convert expression into double array
One way is to convert the symbolic expression to a function with matlabFunction. Then you can pass values to it as for any funct...

26 days ago | 0

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Answered
Finding the matrix I generated two iterations back, while loop
One option is to maintain a list of the last two D's in a cell array: C = [0 0 0; 1 1 1;0 0 0]; B = [zeros(1, N); C; zeros(...

26 days ago | 0

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Answered
Newton's Method in Matlab
Did you check whether the while loop is ever executed, even once? I don't think it is.

26 days ago | 1

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Constraining Function in fmincon
Now that the problem is clearer, it appears to me that you could have done the whole thing with linprog, f=[2,1]*t; Aineq = -...

26 days ago | 0

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Upsampled image FFT contains NaNs.
You have a division by zero in this line, res = y./scale; That leads to NaNs in cp_vol and hence also in shift_vol.

26 days ago | 0

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Answered
Better parallelization than parfor?
The reason why I think it could be improved is that MATLAB tells me that vec in my above example is a 'broadcast' variable and m...

26 days ago | 0

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Nonlinear Least Squares implementation
[x,resnorm,res,eflag,output1] = lsqnonlin(@(x) myLS(F, S0, r, w, t, Q0, x) ,x0) See also Passing Extra Parameters.

26 days ago | 1

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Answered
Returning an Entire Row Based on the Max in a Column
[~,imax]=max(x(:,2)); out = x(imax,:)

26 days ago | 0

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Answered
Constraining Function in fmincon
It sounds like you need to apply a nonlinear constraint. If so, you need to use fmincon with 9 or more input arguments specified...

26 days ago | 0

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