can we determine input varibles accuracy in genetic algorithm?

hello dears,

I'm using genetic algorithm in matlab and i have two input variables (they are temperatures). I want the variables have the exact accuracy of 0.1. Is this possible?

[Adam Danz]

What does it mean that a variable has an accuracy of 0.1? Do you mean that you want the input to always equal 0.1?

[mozhgan shahidani]

no i mean the inputs be like 5.3 or 7.4 or 58.6 ...... in the optimization i get numbers like 1.008 or 2.358 ....... but i want the genetic algorithm consider inputs with just one decimal number.

[Adam Danz]

Ahh.... that's 'precision', not accuracy.

Answer 1

[Adam Danz]

You can round the numbers to one decimal place like this.

 round(x*10)/10

Also note the 2nd optional input to round() since r2014b.

https://www.mathworks.com/help/matlab/ref/round.html

[mozhgan shahidani]

thanks for your thorough answer but this can act just on output values I want the inputs have 0.1 precision. i want the input numbers that are given to my program by ga have 0.1 precision.

[Adam Danz]

Where are the inputs coming from? What's preventing you from doing the rounding just before the numbers go into the algorithm? maybe I'm not understanding the problem.

[mozhgan shahidani]

Ahhhhhhhhhh............. now I got it!!!!Yes this is a good way thanks a lot.

Another question: Is'nt there any way that ga takes inputs with 0.1 precision itself without us doing it?may be by some change in the options or ....?

[Adam Danz]

For that quesiton I'll refer you to this lead: See Alan Weiss's answer

https://www.mathworks.com/matlabcentral/answers/84433-genetic-algorithm-limiting-significant-digits-of-optimization-variable#answer_94136

[mozhgan shahidani]

thanks a lot for all your help and attention.