CODEWITHSUNDEEP
javaandroidmathmethods
zsh5032
zsh5032

Reputation: 141

Math formula not returning correct answer

So i'm trying to make a simple calculator to calculate a wilks score. I'm not getting the correct answer which i'm sure is because i'm not setting up the formula correctly. If I pass in a weight of 180, squat of 300, bench of 300, and deadlift of 400 in lbs I should be getting a wilks of 305.78 but i'm getting 2.0414858^-5

Heres my calcWilks method

   public double calcWilks(double weight, double squat, double bench, double deadLift) {

    double a = -216.0475144;
    double b = 16.2606339;
    double c = -0.002388645;
    double d = -0.00113732;
    double e = Math.pow(7.01863, -6);
    double f = Math.pow(-1.291, -8);
    double x = weight;
    double coeff;
    double score;

    coeff = 500 / (a + (b*x) + (c* Math.pow(x, 2))+ (d* Math.pow(x, 3))
            + (e* Math.pow(x, 4)) + (f* Math.pow(x, 5)));

    double total = squat + bench + deadLift;
    score = coeff* total;
    return score;
}

and heres a link to the actual formaula https://en.wikipedia.org/wiki/Wilks_Coefficient

I'm trying to use the Male formula

Thanks for any help!

Upvotes: 0

Views: 182

Answers (1)

Andy Turner
Andy Turner

Reputation: 140484

The e coefficient's value in the wikipedia page is

7.01863E-06

but you've used

Math.pow(7.01863, -6)

That's not the same thing:

7.01863E-06 = 7.01863 * Math.pow(10, -6).

Just use the value 7.01863E-06 (or 7.01863e-6) directly.

(Same problem with f)

Also, note that the inputs to the formula should be in kilograms; not in pounds, as you state in the question.

Upvotes: 2

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