CODEWITHSUNDEEP
java
Vijay Vennapusa
Vijay Vennapusa

Reputation: 179

How to write UNITS power in decimal value?

I am using Javax.Units package in my project, to write some formual's. I am trying to write this line of code:

Unit newton = SI.NEWTON;
Unit newton09 = newton.pow(0.9);//not allowing me to input decimal value 0.9

The pow method only takes int as parameter, but I am looking for float or double as parameters.How can i write float or double in parameter?

Upvotes: 0

Views: 51

Answers (2)

Hunter McMillen
Hunter McMillen

Reputation: 61540

I think you need to take a step back and recall what exponentiation means, especially with fractional exponents. You are trying to raise some value X to some power M/N.

If you recall what M/N means from your arithmetic class, it is the same as M * 1/N. This is important because it means you can phrase your expression like this: 

X^M^(1/n)

So we have this equivalence :

X^(M/N) == X^M^(1/N)

and anything raised to the 1/N is the same as taking the Nth root, so you can have an equivalent expression by computing this:

Nroot( X^M )

which in that API, would be: 

Unit newton09 = newton.pow(9).root(10);

Upvotes: 1

GriffeyDog
GriffeyDog

Reputation: 8386

You could make use of the root() and pow() methods. A number, n, taken to the 0.9 power is equivalent to n taken to the 9/10 power, which in turn is equal to the 10th root of (n taken to the 9th power). So, you could have this using only ints:

Unit newton09 = newton.pow(9).root(10);

Upvotes: 1

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