Answered
How do I partition a n by m matrix into equal rows
Hint: Consider repelem https://www.mathworks.com/help/matlab/ref/repelem.html

10 days ago | 0

Answered
Integral calculation using matlab
My difficulty stems from the absolute value which is "outside" of the integral Why is this a difficulty? Because it prevents yo...

10 days ago | 0

Answered
finite difference step size value in fmincon
You might try the sqp or interior point algorithm, instead of whatever fmincon algorithm setting you are currently using. Accord...

10 days ago | 0

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Answered
fmincon output is converging to infeasible point
It appears that you are simply trying to find a point where getCost(Y) returns zero. If so, it might make it easier on the algor...

10 days ago | 0

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Algorithm to extract linearly dependent columns in a matrix
See this FEX contribution https://www.mathworks.com/matlabcentral/fileexchange/77437-extract-linearly-independent-subset-of-mat...

11 days ago | 2

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fminbnd loop leads to same optimizer
In addition to hwat John said, you could plot the function to confirm whether fminbnd is giving you a good approximation of the ...

11 days ago | 0

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Answered
return a single vector after a for loop and not individual results
For a fully vectorized solution: [maxval,place]=max(Divergence<=5,[],2); place(maxval==0)=nan; Or, to do the same with a loop...

11 days ago | 0

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Answered
Index in position 1 exceeds array bounds (must not exceed 1). FMINCON
Make theta0 a column vector: >> theta0 = [2,0.2,0.1,0.4].' theta0 = 2.0000 0.2000 0.1000 0.4000

12 days ago | 0

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Answered
How can I determine the amount of times a certain value can be achieved by summing values in a matrix?
Below is a more advanced version of my original answer, which is showing greater empirical succes. It incorporates initializatio...

13 days ago | 0

Answered
How to logically index multiple indices while indexing other indices normally?
You probably won't notice much difference with such small data sizes, but reshape is slightly better than permute because it wil...

13 days ago | 0

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Answered
How do I get every combination of 3 vectors?
Example: [X,Y,Z]=ndgrid(1:3,10:15,100:102); [X(:),Y(:),Z(:)]

13 days ago | 1

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Particularly strange bug using the eval function
I also know that MATHWORKS would prefer me not to define variables that clash with their own builtins. However, the code st...

13 days ago | 2

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Can one set up initial values for fminbnd?
No, you cannot. However, you might get a comparable effect if you use fminsearch instead, setting your objective to Inf outside ...

13 days ago | 0

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Answered
Given a point, locate 3 point in different 8 directions.
Or maybe this is what you want. In the code below, A is your image and the result Neighbors(i,j,:) contains all 9 neighbors of A...

13 days ago | 0

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calculate mean in a for loop
No need for loops, Mean_answer=cumsum(data,2)./(1:size(data,2));

13 days ago | 0

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Given a point, locate 3 point in different 8 directions.
I'm not sure I understand what the how-to challenge is in the question, but the approach that I think you want is to calculate a...

13 days ago | 0

Answered
How can I determine the amount of times a certain value can be achieved by summing values in a matrix?
This solution (EDITED) requires the Optimization Toolbox: LengthVal = [50,50 ,60,70]; %User Input N=numel(LengthVal); X...

15 days ago | 1

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System of equations: Two different versions of Matlab, with the same script, give different solutions
Seems to me that you are getting the same solutions for each fixed Current level, but presented to you in a different order depe...

15 days ago | 1

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How to monitor the output of a function when being called in a separate function
You could return fileStr from the file as an output argument and perform whatever tests are needed in the calling workspace, e.g...

17 days ago | 0

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Answered
Fitness function increases rather than decreasing with fmincon using hybrid Genetic Algorithm
This might happen if your objective has discontinuities or non-differentiabilities. Such functions are outside the scope of fmin...

17 days ago | 0

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Answered
Can one run fminsearch for a function defined by cases?
Because you are optimizing over a known bounded interval fminbnd is more appropriate: x_optimal = fminbnd(@fun,0,2) function...

17 days ago | 1

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Answered
Automatically update attributes of a class ?
This has to go in a file called Rect.m : classdef Rect properties l,b end properties (Depen...

18 days ago | 1

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How to pass field values to subclass from superclass?
Your terminolgy is confusing, so I'm not completely sure I understand your question. "Classes" do not have property values. Only...

18 days ago | 0

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How to use objects of one class in the methods of another class as input?
objc is a Matlab variable like any other, and therefore you can give it as input to a function or class method just like any oth...

18 days ago | 0

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Answered
maximizing a function of 2 variables where coefficients are given by parameters
You can use fminunc, for example, which would do this for you implicitly. Or, you can write down the first order optimality cond...

18 days ago | 0

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Minimizing a scalar value using "fmincon" derived through many variables
Much is unclear from your post including what your unknowns are and how they determine shortprob. However, if S is a function of...

18 days ago | 1

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Answered
3D Matrices projections
You could also use rotation to align the projection rays with an axis of the image and then use mean(). For example, to take the...

18 days ago | 0

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how can i get exact coordinates (x,y) of a pixel, using imcrop function? as it returns values in decimal points.
Just round the [x,y,h,w] if you want the pixel coordinates measured in positive integers. The upper left corners of the crop b...

18 days ago | 0

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Answered
is not prime number command , function to find the nearest prime number
function k=next_prime(n) k=n while ~isprime(k) k=k+1 end end

19 days ago | 0

Answered
How to insert NaNs on an array based on a condition some other array
Using group1s from the File Exchange https://www.mathworks.com/matlabcentral/fileexchange/78008-group1s index = ~isnan(B); na...

19 days ago | 0

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