I keep getting the error "NVARS" must be positive integer while implementing GA. please help....

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priyanka jindal 2020-4-23

评论： priyanka jindal 2020-6-12

I am trying to optimise neural network using Genetic algorithm. but getting error

Error using ga (line 317)

Number of variables (NVARS) must be a positive integer.

Error in GAONN (line 53)

[x, err_ga] = ga(h, c, ga_opts);

please help me how to fix this error...

I am attaching here the code i am using....

Alan Weiss 2020-4-23

I did not read your code in detail, but the line where you call ga is

[x, err_ga] = ga(h, c, ga_opts);

Look at the documentation for the correct syntax of ga:

x = ga(fun,nvars,A,b,Aeq,beq,lb,ub,nonlcon,options)

Use [] for inputs that you do not use. You need to include nvars as a positive integer.

Alan Weiss

MATLAB mathematical toolbox documentation

priyanka jindal 2020-6-12

@Alen Weiss Thankyou sir for helping me..........

priyanka jindal 2020-6-12

I have one more question sir........

How to find out number of fields in structure?

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