How can I make a function be run with only teenager variables in matlab

Dear All,

I have a function with four variables. I want this function be run with only integer variabes. I want to define a bound for each variable and let it run within those span to find the best answer. I dont know how to define the variables to be limited to integers and not other values. for exaple:

Function (A)= optim(B,C,D,E)
B=1:1:10:
C=1:1:10:
D=2:2:10:
E=73:1:77:

It is noted that I am going to run this on Genetic algorithm toolbox. In there I have to determine the upper and lower bound of each parameter. But my problem is that it would be run with all poosible values between the upper and lower bound. I want them to be integer only. How can I do that?

I would appreciate your support in this matter

[dpb]

1. There's no point in having B,C,D,E as input arguments to the function if you're going to define them internally -- either pass the input vectors or remove the arguments
2. B=1:1:10 --> [1 2 3 ... 9 10] which are only integer values so I fail to see where the problem would be?

[R@SH]

Thanks you so much dear dpb for your support.

the proble is that I have to find the minimize of A in GA, and in order to to that I have to define the allowed bound and values for B,C,D and E to look around and find the minimum value for A and its corresponding B,C,D and E.

Since in GA toolbox, I will define the lower and upper bound of each parameter, here in the m.file of matlab I only have to specify that these parameters are integer and also specify the lead value of each parameter. for example:

"B" is an integer and the lead value of that would be 2.

I previousely chose:

Function A=optim(B,C,D,E)

B=x(1);

C=x(2):

D=x(3):

E=x(4);

but when I specified the upper and lower bound for each parameter in GA toolbox, I found that it consider all possibe cases and not only integers. (for example 4.5 for "B" is not acceptable)

I hope it is clear now, and also hope to have your feedback on this matter.

Answer 1

[Image Analyst]

Try this:

function A = optim(B, C, D, E)
% Clip values to a defined range
B = max([1, B]); % Clip so there are no values lower than 1.
B = min([10, B]); % Clip so there are no values more than 10.
% Round to nearest integer.
B = round(B); 
% Clip values to a defined range
C = max([1, C]); % Clip so there are no values lower than 1.
C = min([10, C]); % Clip so there are no values more than 10.
% Round to nearest integer.
C = round(C); 
% Clip values to a defined range
D = max([2, D]); % Clip so there are no values lower than 2.
D = min([10, D]); % Clip so there are no values more than 10.
% Round to nearest integer.
D = round(D); 
% Clip values to a defined range
E = max([73, E]); % Clip so there are no values lower than 73.
E = min([77, E]); % Clip so there are no values more than 77.
% Round to nearest integer.
E = round(E);

[R@SH]

I appreciate your respoce dear Image anayst, which is really valuable.

But the problem is that in GA toolbox, I have to define the maximum and minimum of each input variables (B,C,D,E) and let them to look around between them to find the minimum of objective (A).

In m.file code I only have to define that B,C,D and E are integer and specify their lead value.

In my previous code I specified them as below:

Function A=optim(B,C,D,E)

B=x(1);

C=x(2):

D=x(3):

E=x(4);

and the proble was that I got

B=4.5, C=2.2, D= 52.1 and E= 73 which provide the minimum of A.

I just want this code look around between integers to specify the minimum of A, and I have to determin it in my m.file.

I would appreciate you if you can help me how I should define my input variables in my m.File

[dpb]

I don't have the TB but what see the doc at https://www.mathworks.com/help/gads/mixed-integer-optimization.html?searchHighlight=integer%20optimization&s_tid=srchtitle_integer%20optimization_1 that illustrates how to set integer constraints on variables.

NB: the limitations on the types of problems that can be solved when doing this.