How to compute Frequency distributions ?

[Pierre8r]

Hello,

How to compute Frequency distributions ?

I have a sample array of doubles.
It's just a sample, the real array it's a lot bigger.

double[] array = { 10.1, 34.0, 15.0, 22.5, 24.2, 31.0, 32.0, 37.0 };

I need to know the frequency for 4 categories.

Which is the frequency for the doubles < 10 ?
Which is the frequency for the doubles >= 10 and < 20?
Which is the frequency for the doubles >= 20 and < 30 ?
Which is the frequency for the doubles >= 30 ?

Thanks,

Pierre8r

 

[Stefan Ram]

double[] array = { 10.1, 34.0, 15.0, 22.5, 24.2, 31.0, 32.0, 37.0 };
Which is the frequency for the doubles < 10 ?
Which is the frequency for the doubles >= 10 and < 20?
Which is the frequency for the doubles >= 20 and < 30 ?
Which is the frequency for the doubles >= 30 ?

for( int i = 0; i < array.length; ++i )++count[( int )( array[ i ]/ 10. )];