Answered
How do I find all the positive roots of (e^(-.2x ))(cos(2x))-.15x^2+1
2 things: 1) fzero is designed to find a single zero at a time. You will need to loop through each value for x0 and record the ...

12 years ago | 0

Answered
Genetic Algorithm - Plotting fitness values
PlotFcns needs to be passed in as an option for ga: problem.options.PlotFcns = @gaplotbestf;

12 years ago | 1

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Answered
export m-file with fmincon to C-Code for PowerPC
Hi Daniel, Generating C-Code from MATLAB code that includes optimization solvers such as fmincon is currently not supported. ...

12 years ago | 0

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Solved

Add two numbers
Given a and b, return the sum a+b in c.

12 years ago

Solved

Weighted average
Given two lists of numbers, determine the weighted average. Example [1 2 3] and [10 15 20] should result in 33.333...

12 years ago

Solved

Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Example...

12 years ago

Solved

Find all elements less than 0 or greater than 10 and replace them with NaN
Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...

12 years ago

Solved

Distance walked 1D
Suppose you go from position 7 to 10 to 6 to 4. Then you have walked 9 units of distance, since 7 to 10 is 3 units, 10 to 6 is 4...

12 years ago

Answered
Nonlinear fit to multiple data sets with shared parameters
So if I understand correctly, you want to fit tau1, tau2, tau3 to all the data, but the other parameters are fit on an individua...

12 years ago | 0

Solved

Generate a vector like 1,2,2,3,3,3,4,4,4,4
Generate a vector like 1,2,2,3,3,3,4,4,4,4 So if n = 3, then return [1 2 2 3 3 3] And if n = 5, then return [1 2 2...

12 years ago

Answered
Plotyy - Managing the colors of y-labels
For (1) you can set the YColor property of each of the axes, for example: set(AX(1),'YColor','k'); For (2), if you just ...

12 years ago | 1

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Answered
Solve Non Linear Equations using fsolve
From what I can tell this problem has 1600 equations and only 4 unknowns, which would mean it is overdetermined and likely doesn...

12 years ago | 1

Answered
how can I change symbols in symbolic equations with x(1), x(2), ...
I believe the _matlabFunction_ function is what you are looking for: <http://www.mathworks.com/help/toolbox/symbolic/matlabfu...

12 years ago | 0

Answered
matlab2012a vs matlab20111b. Why does the latter produces an error message?
I think the cause here is that fminunc was updated in R2012a to attempt to recover when the objective function returns NaN or In...

12 years ago | 2

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Answered
How to fit parameters in an m.file to a curve?
Take a look at lsqcurvefit from the Optimization Toolbox. <http://www.mathworks.com/help/toolbox/optim/ug/lsqcurvefit.html>...

12 years ago | 0

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Answered
A very simple question for GA
It looks like there is an issue with the way your decision variables are defined. The input to the objective function (which is...

12 years ago | 0

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Answered
Genetic Algorithm - weights ensemble optimization
Hi Michiel, If you aren't 100% set on using a Genetic Algorithm, I recommend starting with a gradient-based optimization solver...

12 years ago | 0

Answered
Optimization in LinProg
Hi Meemai, The message "Optimization Terminated" means that the optimization completed as normal. If you look at the value o...

12 years ago | 2

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Answered
Optimization Toolbox - Choosing a Solver
Hi Norbert, Since your decision variable shift will need to be an integer (it's being used as an index), you would need to use ...

12 years ago | 1

Answered
matrix inside a matrix
The REPMAT and DIAG commands should be able to do what you need: A = repmat([3;4;5],5,1) B = diag(A,0) Check out the ...

13 years ago | 0

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Answered
Mixed integer optimisation with genetic algorithm problem
Hi Calen, The GA solver uses a penalty function when optimizing mixed-integer problems. The penalty function takes into accoun...

13 years ago | 0

Answered
How can I save the settings of fsolve in the optimization tool ?
You can create an options structure in your MATLAB function and then pass that structure to FSOLVE. The options structure is cre...

13 years ago | 1

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Answered
OUT OF MEMORY
This looks like it might help: <http://www.mathworks.com/products/image/description7.html>

13 years ago | 1

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Answered
Optimization Technique
If you're trying to minimize or maximize Y, and Y is a scalar, I'd recommend trying <http://www.mathworks.com/help/toolbox/optim...

13 years ago | 0

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Solved

Make an awesome ramp for a tiny motorcycle stuntman
Okay, given a vector, say v=[1 3 6 9 11], turn it into a matrix 'ramp' like so: m=[1 3 6 9 11; 3 6 9 11 0; 6 9 ...

13 years ago

Answered
Lsqcurvefit on function depending on syms
Hi Gustav, You'll first need to use the matlabFunction command to convert the symbolic equation into a MATLAB function handle...

13 years ago | 0

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Answered
Solving overdeterminated linear equation system with specified conditions
Hi Thomas, If you have the Optimization Toolbox, LSQLIN can solve constrained least-squares problems: <http://www.mathworks.com...

13 years ago | 1

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Answered
Optimization: share additional output of cost function with constraint function
There was a good discussion on this issue here: <http://www.mathworks.com/matlabcentral/newsreader/view_thread/269936> The te...

13 years ago | 1

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Answered
How to use the OutputFcns function in the optimset options?
<http://www.mathworks.com/help/techdoc/math/bsgpq6p-23.html>

13 years ago | 0

Answered
For LSQNONLIN is it okay if the number of elements in the vector-valued function varies per iteration?
Hi Kevin, LSQNONLIN is using the values in the Fopt vector to determine the gradient, and it does this by calculating Fopt at...

13 years ago | 2

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