Proper Decimal Format?

[<M/>]

Is this correct? I wrote a decimal format and it doesn't work. how do i correct this:

    return sum / myFormatter.format(Math.sqrt(x.length - 1));

I will submit the full code if needed.

[JeffGrigg]

OK, I'll assume that the myFormatter variable holds an instance of the DecimalFormat class. And that the sum variable is some kind of number -- like a int or double or something similar.

So the line you gave above doesn't compile -- because the result of the ".format(...)" method is a String value, and you can't do math (like the division ('/') operator) on String values.

Maybe this is what you want...?

return myFormatter.format(sum / Math.sqrt(x.length - 1));

[dev90]

@JeffGrigg

This also won't compile as this will return String and the function returns double.

I've given answer in above thread:
http://www.daniweb.com/software-development/java/threads/469961/mean-standard-deviation